| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 423179000 | Alkali metal (Li, Na, K, Rb, or Cs) | 78 |
| 20110027152 | COMBINED PROCESS FOR PREPARING CALCINED SODA BY APPLYING SURFACE ENGINEERING TECHNOLOGY TO NATURAL SODA PREPARATION - The invention relates to a combined process for preparing a calcined soda from a natural soda containing sodium chloride, soda and sodium sulphate, which comprises steps: (a) dissolving the natural soda to prepare an aqueous solution; (b) obtaining sodium carbonate decahydrate crystals from the natural soda solution by using a separation method of attaching crystallization; and (c) treating the obtained sodium carbonate decahydrate crystals to obtain the calcined soda. The selection to raw materials in the combined process is widened, and the associated minerals, such as sodium chloride, soda and sodium sulphate, can be separated as simple substances. The species of the obtained calcined soda and anhydrous sodium sulphate are abundant, and their purities are high. Moreover, the entire processes can be recycled, and there is no discharge of smoke, dust, waste liquid and so on. | 02-03-2011 |
| 20110052461 | FILTER TYPE TRAPPING AGENT FOR VOLATILE CESIUM COMPOUND AND TRAPPING METHOD FOR VOLATILE CESIUM COMPOUND THEREOF - A filter type trapping agent for volatile cesium compound and trapping method for volatile cesium compound thereof are provided. More particularly, a filter type trapping agent for volatile cesium compound including silica 40˜65% by weight of silica, 15˜30% by weight of alumina, 5˜15% by weight of iron oxide, 1˜15% by weight of molybdenum oxide, 1˜10% by weight of chromium oxide, and 1˜10% by weight of vanadium oxide and trapping method for volatile cesium compound thereof are provided. Through a filter type trapping agent for volatile cesium compound and a trapping method, only cesium can be selectively separated among the nuclear fission gases. Accordingly, by disposing only the filter where cesium is trapped, the efficiency of an off-gas process improves, expense for disposing filter wastes decreases, and a cesium isotope of the waste filter can be recycled. Therefore, many forms of cesium compound gas are made insoluble efficiently. | 03-03-2011 |
| 423179500 | Lithium | 33 |
| 20090087362 | Cathode Active Material Coated With Fluorine Compound for Lithium Secondary Batteries and Method for Preparing the Same - Disclosed herein is a cathode active material coated with a fluorine compound for lithium secondary batteries. The cathode active material is structurally stable, and improves the charge-discharge characteristics, cycle characteristics, high-voltage characteristics, high-rate characteristics and thermal stability of batteries. | 04-02-2009 |
| 20110002825 | PREPARATION METHOD OF LITHIUM CARBONATE FROM LITHIUM-ION SECONDARY BATTERY RECOVERED MATERIAL - A preparation method of lithium carbonate, in recovering valuable resources of a lithium-ion battery, reducing impurities from lithium carbonate, having a pretreatment process, comprising:
| 01-06-2011 |
| 20110300041 | PROCESS FOR RECOVERING LITHIUM FROM A BRINE - There is disclosed herein a process for recovering lithium from an impure natural or industrial brine, the process comprising adjusting the pH of a feed brine containing lithium to a value of no less than 11.3 and separating the waste solids and a solution containing lithium values. The solution may be further concentrated and treated to obtain lithium carbonate and a lithium chloride solution suitable for obtaining electrolytic grade lithium chloride. | 12-08-2011 |
| 20120141342 | RECOVERY OF LI VALUES FROM SODIUM SATURATE BRINE - The present invention provides a process for recovering Li values from a sodium saturated brine. The process includes recovering Li values from a sodium saturated brine which contains LiX. The process includes concentrating the sodium saturated brine to at least 9000 mg/l LiX, passing the concentrated brine through a bed of polycrystalline hydrated alumina pellets until the pellets are loaded with LiX from the concentrated brine, displacing brine held-up in the bed by using concentrated NaX, unloading LiX from the pellets by flowing through the bed an aqueous solution of LiX which is not saturated, displacing the LiX from the bed using concentrated NaX, and repeating the steps at least one additional time to provide the Li values. | 06-07-2012 |
| 20120189516 | PRODUCTION OF HIGH PURITY LITHIUM COMPOUNDS DIRECTLY FROM LITHIUM CONTAINING BRINES - A process for reducing the amount of magnesium in a lithium-containing brine by adding an aqueous solution of KCl to the brine to precipitate at least some of the magnesium as carnallite salt is disclosed. Lithium salts prepared using this magnesium removal process are also disclosed. | 07-26-2012 |
| 20120237419 | METHOD FOR PRODUCING LITHIUM CARBONATE - The present invention relates to a method for producing lithium carbonate, the method including: mixing ammonia and carbon dioxide gas (carbonate gas) with an aqueous solution containing lithium chloride to conduct a carbonation reaction; and thereafter, recovering a produced solid by solid-liquid separation, and also relates to a method for producing high purity lithium carbonate. | 09-20-2012 |
| 20120288426 | METHOD FOR SEPARATION OF MONOVALENT METALS FROM MULTIVALENT METALS - The present invention is directed to a new more environmentally friendly method for the separation of metals from concentrated solution or more specifically to separate monovalent metals from a solutions that comprise high levels of multivalent metals by using a sulfonic functionalized resin. | 11-15-2012 |
| 20120328498 | METHOD FOR PREPARING HIGH-PURITY LITHIUM CARBONATE FROM BRINE - The present disclosure provides a method of preparing highly pure lithium carbonate from brine. The method includes adding an adsorbent to the brine, from which the magnesium ions Mg | 12-27-2012 |
| 20130071306 | Battery disposal system - Embodiments described herein comprise a system and method for the recycling and recovery of components and metals found within lithium ion batteries. The process includes the safe and effective means of disposing of batteries, including lithium thylnel cloride, lithium ion, conventional designs, in a manner that utilizes a process of alloying to chemically capture the by product. | 03-21-2013 |
| 20130101484 | METHOD FOR THE PRODUCTION OF BATTERY GRADE LITHIUM CARBONATE FROM NATURAL AND INDUSTRIAL BRINES - It is possible to produce battery grade metallic lithium from naturally occurring or industrial brine by a process comprising the following steps: (i) precipitating magnesium with calcium hydroxide; (ii) removal of boron via extraction of solvents; (iii) precipitation of lithium with sodium carbonate; (iv) transformation of lithium carbonate to bicarbonate of lithium with carbonic acid; (v) decomposition of bicarbonate of lithium into high purity lithium carbonate as a result of heating of the solution. Re-precipitation of lithium carbonate by the formation of bicarbonate of lithium allows for the removal of the majority of contaminants which co-purify with lithium carbonate and yield battery grade highly purified lithium carbonate. | 04-25-2013 |
| 20130108527 | Apparatus and Method for Recovering Lithium | 05-02-2013 |
| 20130121899 | METHOD FOR ECONOMICAL EXTRACTION OF MAGNESIUM, BORON AND CALCIUM FROM LITHIUM BEARING SOLUTION - The present invention relates to a method of economical extraction of magnesium, boron and calcium, while minimizing the loss of lithium, from a lithium bearing solution. More specifically, the present invention provides a method for economical extraction of magnesium, boron, and calcium, while minimizing the loss of lithium, from a lithium bearing solution comprising the steps of: (a) adding an alkali in the lithium bearing solution to precipitate magnesium hydroxide; (b) absorbing boron ions on the surface of the magnesium hydroxide by adjusting the pH to about 8.5 to about 10.5; and (c) simultaneously extracting magnesium and boron by filtering the magnesium hydroxide absorbed with the boron ions from the lithium bearing solution. | 05-16-2013 |
| 20130129586 | METHOD FOR ECONOMICAL EXTRACTION OF LITHIUM FROM SOLUTION INCLUDING LITHIUM - The present invention relates to a method of extracting lithium from a lithium bearing solution. More specifically, the present invention provides a method of economical extraction of lithium from a lithium bearing solution by adding a phosphorous supplying material to the solution to precipitate lithium phosphate from the dissolved lithium. | 05-23-2013 |
| 20130251610 | METHOD FOR PRODUCING LITHIUM CARBONATE - The present invention relates to a method for producing lithium carbonate, which is important as a raw material of a lithium ion battery and the like, from brine resources. More specifically, the invention relates to a method for producing lithium carbonate, in which carbon dioxide gas obtained by calcining limestone is introduced, in the presence of ammonia, into a concentrated brine, which is prepared from a lithium-containing brine as a raw material through an evaporative concentrating step, a desulfurizing step and an electrodialysis step, thereby depositing lithium carbonate crystals, and the crystals thus deposited are recovered through solid-liquid separation. | 09-26-2013 |
| 20130272933 | METHOD FOR PRODUCING HIGH-PURITY LITHIUM CARBONATE - Disclosed is a method for producing high-purity lithium carbonate. The method includes: removing magnesium and boron from a brine; separating and removing the remaining magnesium and calcium; concentrating the resulting brine by spray drying to form a powder; washing the powder to concentrate lithium; and carbonating the lithium ions with sodium carbonate (Na | 10-17-2013 |
| 20130287654 | LEACHING SOLUTION AND METAL RECOVERY METHOD - A valuable metal recovery method of recovering metals from a lithium ion battery without using complicate steps and by a relatively simple and convenient facility is intended to be provided. | 10-31-2013 |
| 20140037521 | Processes for Preparing Highly Pure Lithium Carbonate and Other Highly Pure Lithium Containing Compounds - The invention generally relates to methods of selectively removing lithium from various liquids, methods of producing high purity lithium carbonate, methods of producing high purity lithium hydroxide, and methods of regenerating resin. | 02-06-2014 |
| 20140044622 | PRODUCTION OF HIGH PURITY LITHIUM COMPOUNDS DIRECTLY FORM LITHIUM CONTAINING BRINES - A process for reducing the amount of magnesium in a lithium-containing brine by adding an aqueous solution of KCl to the brine to precipitate at least some of the magnesium as carnallite salt is disclosed. Lithium salts prepared using this magnesium removal process are also disclosed. | 02-13-2014 |
| 20140301922 | Preparation of Lithium Carbonate From Lithium Chloride Containing Brines - This invention relates to a method for the preparation of lithium carbonate from lithium chloride containing brines. The method can include a silica removal step, capturing lithium chloride, recovering lithium chloride, supplying lithium chloride to an electrochemical cell and producing lithium hydroxide, contacting the lithium hydroxide with carbon dioxide to produce lithium carbonate. | 10-09-2014 |
| 20140322110 | PROCESSES FOR METAL IONS REMOVAL OF FROM AQUEOUS SOLUTIONS - Provided are continuous methods and processes for removing Li ions from an aqueous feed solution. | 10-30-2014 |
| 20140334997 | PROCESS FOR PRODUCING LITHIUM CARBONATE FROM CONCENTRATED LITHIUM BRINE - Disclosed are methods for a simplified process for preparing lithium carbonate from concentrated lithium brine which can be used for battery grade, pharmaceutical and other high purity grade applications. Impure lithium carbonate is precipitated from lithium concentrated brine, preferably lowered in magnesium, subsequently suspended in aqueous solution and reacted with carbon dioxide to form dissolved lithium bicarbonate. The insoluble impurities are filtered and the dissolved boron and metal impurities such calcium, magnesium and iron are physically separated from the lithium bicarbonate solution using ion selective mediums or other selective processes. Lithium carbonate is then subsequently precipitated. | 11-13-2014 |
| 20140348734 | METHOD FOR EXTRACTION OF LITHIUM FROM LITHIUM BEARING SOLUTION - A method of extracting lithium from a lithium bearing solution and specifically, economically extracting lithium from a lithium bearing solution comprising the steps of: adding a nucleus particle to a lithium bearing solution; and precipitating the dissolved lithium in the lithium bearing solution as lithium phosphate by adding a phosphorous supplying material to the lithium bearing solution including the nucleus particle is provided. | 11-27-2014 |
| 20140377154 | LITHIUM RECOVERY METHOD - To provide a lithium recovery method which is capable of efficiently recovering lithium without containing impurities, such as phosphorus and fluorine. In the present invention, an alkali is added to a discharge liquid and/or a cleaning liquid containing lithium discharged in a process of recovering valuable metals from a lithium ion battery, an acidic solvent extractant is caused to be in contact with the discharge liquid and/or the cleaning liquid under a condition of pH 9 or less and a temperature of 0 to 25° C. and lithium ions are extracted, and the acidic solvent extractant having extracted the lithium ions is caused to be in contact with an acid solution of pH 3 or less and the lithium ions are stripped. | 12-25-2014 |
| 20150071837 | Method for Manufacturing Lithium Hydroxide and Method Using Same for Manufacturing Lithium Carbonate - The present invention relates to a method of manufacturing lithium hydroxide and a method of manufacturing lithium carbonate using the same. The method of manufacturing lithium hydroxide includes: preparation of a lithium phosphate aqueous solution including lithium phosphate particles; addition of a phosphate anion precipitation agent to the lithium phosphate aqueous solution; and precipitating a sparingly soluble phosphate compound through a reaction of cations of the phosphate anion precipitation agent with anions of the lithium phosphate. | 03-12-2015 |
| 20150132202 | Porous Activated Alumina Based Sorbent for Lithium Extraction - This invention relates to a method for preparing a lithium activated alumina intercalate solid by contacting a three-dimensional activated alumina with a lithium salt under conditions sufficient to infuse lithium salts into activated alumina for the selective extraction and recovery of lithium from lithium containing solutions, including brines. | 05-14-2015 |
| 20150147248 | PROCESS AND EQUIPMENT FOR PRODUCING PURE LITHIUM-CONTAINING SOLUTION - The invention relates to a process for producing a lithium-containing solution from a lithium-containing raw-material solution, by: a) precipitating a first part of magnesium and calcium from the lithium-containing raw-material solution, b) extracting a second part of calcium and magnesium from the lithium-containing solution by liquid-liquid extraction, a resultant product being a lithium-containing solution. The invention also relates to equipment for producing a lithium-containing solution from a lithium-containing raw-material solution, including a precipitation unit to remove a first part of magnesium and calcium and an extraction unit to receive the lithium-containing raw-material solution and to remove therefrom a second part of calcium and magnesium by liquid-liquid extraction, and control unit to control the operation of the precipitation unit. | 05-28-2015 |
| 20150299822 | EXTRACTING AGENT FOR SEPARATING LITHIUM ISOTOPES AND USE THEREOF - The present invention discloses an extracting agent for separating lithium isotopes and an organic extraction phase containing the extracting agent; the organic extraction phase easily enriches | 10-22-2015 |
| 20160167976 | Production Of High Purity Lithium Compounds Directly Form Lithium Containing Brines | 06-16-2016 |
| 20170233261 | PRODUCTION OF LITHIUM HYDROXIDE | 08-17-2017 |
| 20190144294 | METHOD OF PRODUCING HIGH-PURITY LITHIUM CARBONATE AND BARIUM SULFATE FROM DISCARDED LITHIUM SECONDARY BATTERIES | 05-16-2019 |
| 20190144295 | METHOD OF PRODUCING HIGH-PURITY LITHIUM CARBONATE BY CONTROLLING PARTICLE SIZE, PARTICLE SIZE DISTRIBUTION, AND PARTICLE SHAPE | 05-16-2019 |
| 20220134291 | LITHIUM EXTRACTION COMPOSITE FOR RECOVERY OF LITHIUM FROM BRINES, AND PROCESS OF USING SAID COMPOSITION - A lithium extraction composite comprising: (i) a porous support and (ii) particles of a lithium-selective sorbent material coated on at least one surface of the support, wherein the support has a planar membrane, fiber (or rod), or tubular shape. A method for extracting and recovering a lithium salt from an aqueous solution by use of the above-described composition is also described, the method comprising (a) flowing the aqueous source solution through a first zone or over a first surface of the lithium extraction composite to result in selective lithium intercalation in the lithium-selective sorbent material in the first zone or first surface; and (b) simultaneously recovering lithium salt extracted in step (a) from said lithium-selective sorbent material by flowing an aqueous stripping solution through a second zone or over a second surface of the lithium extraction composite in which lithium ions from the first zone or first surface diffuse. | 05-05-2022 |
| 20220135416 | EXTRACTION SYSTEM, EXTRACTION METHOD FOR SEPARATING MAGNESIUM AND EXTRACTING LITHIUM AND BORON FROM MAGNESIUM-CONTAINING BRINE WITH COMPLEX SOLVENT OF SECONDARY AMIDE/ALKYL ALCOHOL AS WELL AS APPLICATIONS THEREOF - The extraction system contains secondary amides and alkyl alcohols which are separately used as the extractants for extracting lithium and boron and consist of a single compound or a mixture of two or more compounds, and the total number of carbon atoms in their molecules are 12˜18 and 8˜20 respectively; the extraction system has a freezing point less than 0° C. With a volume ratio of an organic phase and a brine phase being 1˜10:1, at a brine density of 1.25˜1.38 g/cm | 05-05-2022 |
| 423181000 | Ion exchanging or liquid-liquid extracting | 6 |
| 20110268633 | Utilisation Of Desalination Waste - A process for producing soda ash from brine waste, the process including reacting brine waste with carbon dioxide and ammonia to produce soda ash, where in at least a portion of the ammonia is regenerated from the ammonium chloride produced during the reaction, the regeneration ideally be achieved by the use of a weak base anion exchange resin. | 11-03-2011 |
| 20120100051 | RECOVERY OF PHOSPHORUS VALUES AND SALT IMPURITIES FROM AQUEOUS WASTE STREAMS - The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate. | 04-26-2012 |
| 20130272934 | USING THE SOLID WASTE-QUICKLIME MEMBRANE SWQM PROCESS FOR THE PRODUCTION OF SODIUM HYDROXIDE - The proposed invention uses ion exchange technology to produce dilute caustic soda liquor from calcium hydroxide liquor Ca(OH) | 10-17-2013 |
| 20130323143 | USING ALKALINE FLY ASH AND SIMILAR BYPRODUCTS IN AN ION-EXCHANGE/REVERSE OSMOSIS PROCESS FOR THE PRODUCTION OF SODIUM CARBONATE - The proposed invention uses industrial byproducts such as fly ash in an ion exchange/reverse osmosis (IE/RO) patented technology to sequester carbon dioxide CO2 gas and produce 6 to 7% sodium carbonate (Na | 12-05-2013 |
| 20140186242 | WATER TREATMENT - The invention provides a method of reducing the sodium content of a water containing dissolved sodium ions, particularly a water with a sodium ion content of at least 100 ppm. Examples of such waters are effluents such as acid mine drainage and river waters. The method includes the steps of:
| 07-03-2014 |
| 20160160319 | TREATMENT METHOD OF CHLORINE-CONTAINING ZINC OXIDE SECONDARY MATERIAL - The invention discloses a treatment method of a chlorine-containing zinc oxide secondary material, which comprises the following steps: 1) leaching the chlorine-containing zinc oxide secondary material I through an acid solution; 2) selectively extracting zinc through P204-kerosene solvent; 3) implementing stripping-electrolysis zinc recovery; 4) repeating steps 1)-4); 5) taking out the raffinate obtained from the Step (4), mixing the residual taken out raffinate with chlorine-containing zinc oxide secondary material II when balance on chlorine ion input and taking out is achieved; carrying out liquid-solid separation; leaching the separated deposit through acid raffinate of the step 1); 6) after separated solution achieves preset conditions, purifying the chlorine-containing aqueous phase; 7) evaporating and concentrating to crystallize out KCl and NaCl products. The invention is environment-friendly and energy-saving, and free from process wastewater emission; production cost is greatly reduced and secondary pollution of the current dechloridation process is eliminated thoroughly. | 06-09-2016 |
| 423182000 | Regenerating solution | 2 |
| 423183000 | Hydroxide solution | 2 |
| 20140140906 | TREATMENT METHOD FOR SPENT CAUSTIC SODA - An embodiment of the present invention relates to a method for treating spent caustic soda generated from an oil refinery process, a petrochemical process, etc. through a process in which a series of treatment steps are integrated, wherein the method can constitute a process under mild conditions excluding high temperature and/or high pressure conditions and can be advantageous to a post treatment process since the amount of by-products is small. | 05-22-2014 |
| 20150132203 | Process for Treating a Sodium Carbonate Purge - A method for treating a purge stream derived from a sodium carbonate, sesquicarbonate, wegsheiderite, or bicarbonate crystallizer, | 05-14-2015 |
| 423184000 | Forming insoluble substance in liquid | 23 |
| 20100143220 | Cost-Effective Process for the Preparation of Solar Salt Having High Purity and Whiteness - The process of the invention deals with significant improvements in salt purity and whiteness brought about through treatment of brine with alum prior to charging into crystallizers for solar salt production. The improvements realized are partly on account of elimination of suspended impurities like gypsum and clayey matter in the brine, which may otherwise be carried along with the brine in the crystallizer and finally end up in the salt, and partly due to the improved crystal size and morphology that minimizes embedded impurities in the salt. Rain washing of the heaped salt has resulted in a salt with greatly reduced calcium and sulphate impurity levels hitherto not achieved in solar salt production. Alum treatment by the process of the invention requires no additional time or infrastructure and the cost of the treatment works out to <3 U.S. cents per ton of salt. The process can be implemented in any solar salt works. | 06-10-2010 |
| 20100196232 | Ozone treatment of alkali metal compound solutions - An aqueous solution containing an alkali metal compound solute and organic compound contaminants may be treated with ozone to oxidize and/or dissolve the organic contaminants. Treating the aqueous solution with ozone may decrease color contaminants in the alkali metal compound and may also decrease foaming in subsequent crystallization of the alkali metal compound. | 08-05-2010 |
| 20100226840 | Removal of impurities in the production of crystalline sodium carbonate, bicarbonate, or sulfite - A magnesium treatment for removing water-soluble impurities in a process for making crystalline sodium carbonate, bicarbonate, or sulfite. A waste comprising such impurities is treated with a magnesium compound to form water-insoluble matter which is removed to form a purified solution. The treatment may be performed on a solution which contains the waste and optionally dissolved calcined trona. The purified solution may be used as a feedstock to form crystalline soda ash, and/or used as a reactant to produce crystalline sodium sulfite or bicarbonate via reaction with SO | 09-09-2010 |
| 20110274599 | Impurities removal from waste solids in the production of soda ash, sodium bicarbonate and/or other derivatives - A method for removing impurities from a waste solid to provide at least a portion of a suitable crystallizer feed to a process for making crystalline sodium carbonate, bicarbonate, and/or other derivatives. The method comprises: contacting the waste solid with a leach solution to dissolve at least one impurity and dissolving the resulting leached residue. Leaching may include heap percolation. The leach solution may comprise a crystallizer purge liquor, a process waste effluent, a mine water, or mixtures thereof. The method may further comprise adding a magnesium compound to the resulting leached residue during or after its dissolution to remove another impurity. The waste solid preferably comprises a pond solid containing such impurities. The pond solid may be recovered from a pond receiving crystallizer purge liquor(s) and/or other process waste effluent(s). The pond solid may contain sodium carbonate, any hydrate thereof, sodium bicarbonate, and/or sodium sesquicarbonate. The impurities to be removed may comprise sodium chloride, sodium sulfate, silicates, and/or organics. | 11-10-2011 |
| 20130095011 | Process for the joint production of sodium carbonate and sodium bicarbonate - A process for the production of sodium carbonate and sodium bicarbonate out of trona, comprising crushing trona ore and dissolving it in a leaching tank containing a solution comprising sodium carbonate and sodium bicarbonate, and an additive selected from the group consisting of: phosphates, phospholipids, carboxylates, carboxilic acids, and combinations thereof, saturated in sodium bicarbonate, in order to produce solid particles suspended in a production solution comprising sodium carbonate, the solid particles containing insoluble impurities and at least 65% by weight of sodium bicarbonate. The solid particles are separated from the production solution containing sodium carbonate. At least part of the production solution containing sodium carbonate is taken out of the leaching tank. | 04-18-2013 |
| 20150044113 | Potash Processing with Mechanical Vapor Recompression - A potash-extraction system and method for extracting potash from a brine containing potash without the use of water-consuming evaporation ponds or additional chemicals is disclosed. The potash processing system uses a mechanical-vapor recompression (“MVR”) cycle to separate salt and then potash from a sylvinite brine containing salt and potash. In embodiments, the latent heat recovered from condensing vapor may be used to boil the brine to precipitate some salt and remove some water (in the form of water vapor) from the brine. The remaining potash-concentrated brine may then be cooled to precipitate potash from the solution. The precipitated potash may then be further processed for final use. | 02-12-2015 |
| 20150118130 | BORON RECOVERY APPARATUS, BORON RECOVERY METHOD, AND BORON RECOVERY SYSTEM - Disclosed is a boron recovering device including: an aeration-type water-channel reactor including a water channel; at least one aeration unit disposed in the water channel and aerating a boron-containing solution by passing it through the water channel to deposit boron in the form of borax; and a precipitation bath precipitating the deposited borax in the boron-containing solution having passed through the aeration-type water-channel reactor and separating a filtrate by overflowing, a boron recovering device, a method of recovering boron, and a boron recovering system. | 04-30-2015 |
| 423185000 | Fluorinating or defluorinating | 1 |
| 20140170041 | Methods for Removing Potassium, Rubidium, and Cesium, Selectively or in Combination, From Brines and Resulting Compositions Thereof - The invention generally relates to methods of removing potassium, rubidium, and/or cesium, selectively or in combination, from brines using tetrafluoroborates. Also disclosed are methods of producing potassium, rubidium, and/or cesium chlorides using ionic liquids and exchange media. This invention also generally relates to treated geothermal brine compositions containing reduced concentrations of silica, iron, and potassium compared to the untreated brines. Exemplary compositions of the treated brine contain a concentration of silica ranging from about 0 mg/kg to about 15 mg/kg, a concentration of iron ranging from about 0 mg/kg to about 10 mg/kg, and a concentration of potassium ranging from about 300 mg/kg to about 8500 mg/kg. Other exemplary compositions of the treated brines also contain reduced concentrations of elements like rubidium, cesium, and lithium. | 06-19-2014 |
| 423186000 | Carbonating | 10 |
| 20110250109 | Process for the joint production of sodium carbonate and sodium bicarbonate - Process for the joint production of sodium carbonate and sodium bicarbonate out of trona, comprising introducing and dissolving crushed trona ore is introduced and dissolved in a leaching tank containing a solution comprising sodium carbonate and sodium bicarbonate, saturated in sodium bicarbonate, in order to produce solid particles suspended in a production solution comprising sodium carbonate, the solid particles containing insoluble impurities and at least 65% in weight of sodium bicarbonate; separating the solid particles from the production solution containing sodium carbonate; drying and valorizing the separated solid particles; taking at least part of the production solution containing sodium carbonate out of the leaching tank in order to constitute a produced solution which is valorized; and introducing water in the leaching tank. | 10-13-2011 |
| 423187000 | Utilizing or forming nitrogenous compound | 1 |
| 20150093309 | Method Of Recycling Of By-Products For The Production Of Soda Ash And Ammonium Sulphate - A method of producing soda ash and ammonium sulphate by recycling by-products of Merseberg and Solvay processes includes treating brine with soda ash distiller waste for desulphatation of the brine to obtain gypsum, recovering pure salt from the desulphated brine and utilizing it in manufacture of soda ash in a Solvay process, washing the gypsum and reacting it with liquor ammonia and carbon dioxide to obtain CaCO | 04-02-2015 |
| 423188000 | Subjecting mixture to pressure, vacuum, or steam | 1 |
| 20140050639 | SEPARATION METHOD FOR POTASSIUM FROM AQUEOUS KOH SOLUTIONS - The process described herein demonstrates a more efficient and effective way to remove certain chemicals from industrial waste water. Specifically, the invention set forth demonstrates a method comprised of at least two steps in which up to 96% of potassium can be removed from an aqueous solution comprising potassium hydroxide. | 02-20-2014 |
| 423189000 | Utilizing carbon dioxide as reactant | 6 |
| 20130011312 | Process for the joint production of sodium carbonate and sodium bicarbonate - Process for the joint production of sodium carbonate and sodium bicarbonate crystals, according to which: a solid powder derived from sodium sesquicarbonate, having a mean particle diameter comprised between 0.1 and 10 mm is dissolved in water; the resulting water solution is introduced into a crystallizer, wherein a first water suspension comprising sodium carbonate crystals is produced; the first water suspension is subjected to a separation, in order to produce crystals comprising sodium carbonate on the one hand, which are valorized, and a mother liquor on the other hand; and a part of the mother liquor is taken out of the crystallizer and put into contact in, a gas liquid contactor, with a gas comprising carbon dioxide, in order to produce a second water suspension comprising sodium bicarbonate crystals, which are separated and valorized. A reagent powder comprising sodium bicarbonate crystals made by such process. | 01-10-2013 |
| 20140219892 | SEPARATION METHOD FOR POTASSIUM FROM AQUEOUS KOH SOLUTIONS - The process described herein demonstrates a more efficient and effective way to remove certain chemicals from industrial waste water. Specifically, the invention set forth demonstrates a method comprised of at least two steps in which up to 96% of potassium can be removed from an aqueous solution comprising potassium hydroxide. | 08-07-2014 |
| 20140241962 | Interconnected System and Method for the Purification and Recovery of Potash - The present invention provides a kiln for the combustion of agricultural waste. The kiln includes a central cylindrical combustion chamber. The central cylindrical combustion chamber includes a system for the control of combustion air to the combustion chamber. The kiln includes a second concentric cylinder surrounding the central cylindrical combustion chamber. The second concentric cylinder includes a system for the flow of cooling water through the first annulus between the central cylindrical combustion chamber and the second concentric cylinder. The kiln includes a system for the feeding of the agricultural waste into the central combustion chamber. The kiln includes a temperature sensing device to measure and display the temperature within the central combustion chamber during the combustion of the agricultural waste. The kiln includes a system for the recovery of ash from the kiln. In operation, the temperature of combustion is controlled to between 550° C. and 650° C. by a combination of increasing the supply of combustion air when the temperature in the central combustion chamber falls to near 550° C. and the introduction of cooling flowing water when the temperature in the central combustion chamber approaches 600° C. | 08-28-2014 |
| 423190000 | Mixture contains metal chloride | 3 |
| 20130156662 | Process for producing sodium bicarbonate - A process for producing sodium bicarbonate from a sodium carbonate bearing stream (A) comprising at least 2% sodium chloride and/or sodium sulfate by weight, a part of such stream (A) being generated by a sodium carbonate crystallizer, comprising: a) mixing the stream (A) with part of a stream (B) to produce a stream (C); b) bicarbonating the stream (C) with a gas (D) comprising CO | 06-20-2013 |
| 20130156663 | Process for producing sodium bicarbonate - A process for producing sodium bicarbonate from a sodium carbonate bearing stream (A) comprising sodium carbonate and an alkaline metal salt impurity at a concentration C | 06-20-2013 |
| 20150098876 | Process for the joint production of sodium carbonate and sodium bicarbonate - Process for the joint production of sodium carbonate and sodium bicarbonate crystals, according to which: a solid powder derived from sodium sesquicarbonate, having a mean particle diameter comprised between 0.1 and 10 mm is dissolved in water; the resulting water solution is introduced into a crystallizer, wherein a first water suspension comprising sodium carbonate crystals is produced; the first water suspension is subjected to a separation, in order to produce crystals comprising sodium carbonate on the one hand, which are valorized, and a mother liquor on the other hand; and a part of the mother liquor is taken out of the crystallizer and put into contact in, a gas liquid contactor, with a gas comprising carbon dioxide, in order to produce a second water suspension comprising sodium bicarbonate crystals, which are separated and valorized. A reagent powder comprising sodium bicarbonate crystals made by such process. | 04-09-2015 |
| 423192000 | Hydroxylating or hydrating | 1 |
| 20150086452 | PROCESS FOR MANUFACTURE OF SODIUM HYDROXIDE AND SODIUM CHLORIDE PRODUCTS FROM WASTE BRINE - The present invention provides a process for the manufacture of sodium hydroxide and sodium chloride products from a waste brine stream containing sodium chloride, and at least sodium carbonate or sodium bicarbonate. The method of this invention comprises converting the sodium carbonate and/or sodium bicarbonate to sodium hydroxide through addition of lime to the brine, while simultaneously converting impurities to less soluble forms to facilitate their removal. The causticized brine is separated from unreacted lime, calcium carbonate and solid impurities to produce clean brine with reduced levels of impurities. The brine is then concentrated by evaporation, forming relatively pure sodium chloride crystals, which are extracted and rinsed to reduce alkali contaminants. The process continues until sodium hydroxide solution strength of about 46-50% is reached, with cooling of the solution and separation of crystallised salts further reducing impurities to a comparable level to diaphragm cell derived industrial grade sodium hydroxide. | 03-26-2015 |
| 423195000 | Subjecting mixture to pressure, vacuum, or steam | 1 |
| 20090169448 | Catalytic Gasification Process with Recovery of Alkali Metal from Char - Processes are described for the extraction and recovery of alkali metal from the char that results from catalytic gasification of a carbonaceous material. Among other steps, the processes of the invention include a hydrothermal leaching step in which a slurry of insoluble particulate comprising insoluble alkali metal compounds is treated with carbon dioxide and steam at elevated temperatures and pressures to effect the conversion of insoluble alkali metal compounds to soluble alkali metal compounds. Further, processes are described for the catalytic gasification of a carbonaceous material where a substantial portion of alkali metal is extracted and recovered from the char that results from the catalytic gasification process. | 07-02-2009 |
| 423197000 | Halogenating | 3 |
| 20110123420 | PROCESS FOR THE FORMULATION OF POTASSIUM CHLORIDE FROM A CARNALLITE SOURCE - A process for formulating high purity potassium chloride from a carnallite source. The process takes advantage of solubility differences and saturation levels in a multiple salt system generated upon dissolution of carnallite. In the system, the sodium chloride is kept in solution and the magnesium chloride present in the system is controlled to be in a concentration range of between 12% and 25% by weight. This avoids co-precipitation of sodium chloride with the potassium chloride during crystallization and therefore prevents the sodium chloride from contaminating the potassium chloride. The result is high grade potassium chloride. | 05-26-2011 |
| 20150010448 | SELECTIVE EXTRACTION OF POTASSIUM CHLORIDE EMPLOYING TARTARIC ACID AS SAFE, BENIGN AND RECYCLABLE EXTRACTANT - Although U.S. Pat. No. 8,182,784 teaches the recovery of potassium chloride from schoenite end liquor (SEL) using dipicrylamine as extractant, and consequently simplifies the recovery of sulphate of potash (SOP) from kainite mixed salt employing the scheme disclosed in U.S. Pat. No. 7,041,268, the hazards associated with this extractant have thwarted practical utilization of the invention. Many other extractants for potash recovery have been disclosed in the prior art but none has been found suitable so far for practical exploitation. It is disclosed herein that the bitartrate ion, and particularly L-bitartrate, precipitates out potassium bitartrate very efficiently from SEL with ca. 90% utilization of the extractant. In contrast, recovery of potassium bi-tartrate from sea bittern directly is relatively much lower. It is further disclosed that this precipitate can be treated with magnesium hydroxide and magnesium chloride to throw out magnesium tartrate with ca. 90% recovery while yielding a nearly saturated solution of potassium chloride which can be utilized for the reaction with schoenite to obtain SOP. It is further demonstrated that the magnesium tartrate can be treated with an appropriate amount of aqueous HCl and added into a subsequent batch of SEL to throw out potassium bitartrate once again which demonstrates the recyclability of the extractant. The overall loss of tartrate over a cycle was ca. 20% but the dissolved tartrate remaining in the K-depleted SEL and KCl solutions can be precipitated out as calcium tartrate from which tartaric acid can be recovered by known methods, curtailing thereby the loss of tartaric acid per kg of KCl to <5 g. It is also demonstrated that through a similar approach, seaweed sap containing ca. 4% KCl can be concentrated to 20-22% KCl, with excellent utilization efficiency of tartaric acid, and this solution can similarly be utilized for SOP preparation. Potassium salts bearing other anions such as sulphate, nitrate, phosphate and carbonate can also be prepared from the isolated potassium bitartrate. | 01-08-2015 |
| 20160184794 | APPARATUS FOR MANUFACTURING POTASSIUM COMPOUND AND METHOD OF RECOVERING POTASSIUM COMPOUND FROM BRINE - The present invention relates to an apparatus for manufacturing a potassium compound and a method of recovering a potassium compound from a brine, and provides the apparatus for manufacturing the potassium compound, including: a continuous pre-treatment apparatus including a crushing portion, a pulverization portion, and a particle size separation portion for processing a mixed raw material salt obtained after lithium, magnesium, and calcium are extracted from a brine to have a particle size for easy separation and sorting; a continuous potassium compound lump recovering apparatus continuously separating and recovering the potassium compound from the pre-treated mixed raw material salt; a continuous potassium compound separating and sorting apparatus continuously separating and sorting potassium chloride and a glaserite (Na | 06-30-2016 |
| 423199000 | Sulfating | 1 |
| 20130121900 | METHODS OF PROCESSING POLYHALITE ORE, METHODS OF PRODUCING POTASSIUM SULFATE, AND RELATED SYSTEMS - Methods of forming potassium sulfate include calcining polyhalite ore particles to convert the polyhalite ore particles to a water-soluble composition. At least a portion of the water-soluble composition is dissolved in an aqueous medium to form an aqueous solution comprising K | 05-16-2013 |
| 423200000 | Volatizing an alkali metal | 1 |
| 20160130682 | Methods For Recovering Cesium Or Rubidium Values From Ore Or Other Materials - A method to liberate and recover cesium, rubidium, or both from ore or other material is described. The method involves heating the ore or other material in the presence of at least one reactant. The heating is such that it liberates at least a portion of the cesium or rubidium or both from the ore. Cesium or rubidium or both resulting from the method are further described. | 05-12-2016 |
| 423201000 | Agitating during heating or reaction | 1 |
| 20140322111 | BOUNDARY LAYER CARBONATION OF TRONA - A boundary layer carbonation process for producing sodium bicarbonate crystals having specific surface area in the range 0.4 m | 10-30-2014 |
| 423202000 | Treating with acid or acid salt | 1 |
| 20140255278 | Methods To Recover Cesium Or Rubidium From Secondary Ore - A method to recover cesium, rubidium, or both from secondary ore is described and involves using scans and sorting techniques. Refined secondary ore is further described. | 09-11-2014 |
| 423203000 | Subjecting mixture to pressure, vacuum, or steam | 1 |
| 20100239477 | Method of decarbonation and its use in producing crystalline sodium sulfite or other alkali products - A sodium sulfite liquor is formed by reacting sodium carbonate with sulfur dioxide. A CO | 09-23-2010 |
| 423206100 | Mixture contains organic or carbonaceous impurity | 6 |
| 423206200 | Alkali carbonate from trona | 4 |
| 20090238740 | METHOD OF REMOVING FLUORIDE IMPURITIES FROM TRONA AND PREPARATION OF SODIUM BICARBONATE - The invention relates to a method of preparing sodium bicarbonate from trona containing sodium fluoride as an impurity comprising preparing a saturated solution of trona and filtering the trona solution to remove insoluble impurities; introducing carbon dioxide to the trona solution till the pH of the solution reaches the range of 7.5 to 8.75 and sodium carbonate in the trona solution is converted to sodium bicarbonate that precipitates; and recovering the precipitated sodium bicarbonate from the trona solution. | 09-24-2009 |
| 20090291038 | Process For The Joint Production of Sodium Carbonate and Sodium Bicarbonate - Process for the joint production of sodium carbonate and sodium bicarbonate crystals, according to which:
| 11-26-2009 |
| 20120063974 | Method of Beneficiating and Drying Trona Ore Useful for Flue Gas Desulfurization - A method of producing trona suitable for flue gas desulfurization comprising mechanically mining a trona ore deposit containing insoluble impurities; crushing the mined trona ore to create a mixture of uncalcined trona-rich particles and impurities-rich particles; beneficiating the crushed uncalcined trona ore to obtain a trona-rich, impurities-depleted ore fraction; and drying the trona-rich ore fraction under non-calcining conditions to yield a dry uncalcined trona ore. A preferred embodiment includes concurrently milling and drying the trona-rich, impurities-depleted ore fraction to recover a low moisture content trona product having a high NaHCO | 03-15-2012 |
| 20150315675 | Process for producing sodium carbonate from an ore mineral comprising sodium bicarbonate - Process to produce sodium carbonate from an ore mineral comprising sodium bicarbonate, comprising: dissolving sodium carbonate particles having a mean diameter D50, measured by sieve analysis, less than 250 μm in a water solution; introducing the resulting production solution comprising sodium carbonate into less basic compartments of an electrodialyser comprising alternating less basic and more basic adjacent compartments separated from each other by cationic membranes; producing a solution comprising sodium hydroxide into the more basic compartments; extracting the solution comprising sodium hydroxide from the more basic compartments of the electrodialyser and used to constitute a reaction solution; and putting the reaction solution into contact with the mineral ore comprising sodium bicarbonate in order to form a produced solution comprising sodium carbonate. | 11-05-2015 |
| 423207000 | Burning the impurity | 2 |
| 20090169449 | Catalytic Gasification Process with Recovery of Alkali Metal from Char - Processes are described for the extraction and recovery of alkali metal from the char that results from catalytic gasification of a carbonaceous material. Among other steps, the processes of the invention include a hydrothermal leaching step in which a slurry of insoluble particulate comprising insoluble alkali metal compounds is treated with carbon dioxide and steam at elevated temperatures and pressures to effect the conversion of insoluble alkali metal compounds to soluble alkali metal compounds. Further, processes are described for the catalytic gasification of a carbonaceous material where a substantial portion of alkali metal is extracted and recovered from the char that results from the catalytic gasification process. | 07-02-2009 |
| 20130230439 | METHOD FOR RECOVERING POTASSIUM SULPHATE FROM BIODIESEL PRODUCTION - A method is disclosed for treating residues from biodiesel production for the isolation of highly pure potassium sulphate from potassium sulphate-containing sludge. First, potassium sulphate-containing sludge from biodiesel production is heated in the first stage under non-oxidizing conditions to a material temperature between 400 and 700° C.; in a second stage the product from the first stage is heated under oxidizing conditions to material temperatures between 700 and 900° C. | 09-05-2013 |
| 423208000 | Water leaching or forming water soluble substance | 1 |
| 20130171048 | Solution mining of ore containing sodium carbonate and bicarbonate - A solution mining method for recovering alkali values from a cavity of an underground ore formation comprising trona and/or wegscheiderite; a manufacturing process using such method to make sodium-based product(s); and a sodium-based product obtained therefrom. The method comprises: an ore dissolution phase (a) in which the incongruent double-salt in trona and/or wegscheiderite is dissolved from an ore face in a first solvent, and a cavity cleaning phase (b) in which sodium bicarbonate deposited on the ore face during the dissolution phase (a) is dissolved into a second aqueous solvent having a higher pH, hydroxide content, and/or temperature and is partly or completely converted in situ to sodium carbonate. The method further comprises withdrawing a liquor resulting from either phase to the ground surface, optionally recycling some liquor to the cavity; and passing some liquor through a crystallizer, a reactor, and/or an electrodialyser, to form at least one sodium-based product which is recovered. | 07-04-2013 |
| 423209000 | Carbonating | 1 |
| 20140205521 | DRY SORBENT INJECTION (DSI) RECOVERY SYSTEM AND METHOD THEREOF - The invention generally relates to system and method for recovering sodium bicarbonate from a solid waste, and more particularly to a method and system for recovering sodium bicarbonate from fly ash of a coal fired plant collected downstream of an injection process for pollution reduction from the industrial process. | 07-24-2014 |
