| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 423155000 | Alkaline earth metal (Mg, Ca, Sr, or Ba) | 67 |
| 20090123351 | PROCESS FOR THE PREPARATION OF CALCIUM PHOSPHATE GRANULES OF THE HYDROXYAPATITE TYPE - The objective of the present innovation is a new process for the preparation of calcium phosphate granules of the hydroxyapatite type. The preparation process of a business for the said granules based on the invention is a hydrolysis process of a brushite dicalcium phosphate, in a basic milieu which is characterised by the fact that an aqueous suspension of brushite dicalcium phosphate is treated with lime, in the presence of an effective quantity of a carboxylic acid. | 05-14-2009 |
| 20110020199 | Process for enhanced remediation of contaminated wastewaters, soils and wasteforms - The present invention provides reagents that may be useful for treating wastes such as impure aqueous materials including wastewater to remove a significant proportion of the heavy metals that may be contained therein. The reagents include a calcium aluminosilicate (CAS) source and may include one or more of the following elements as an oxide: calcium oxide, aluminum oxide, silicon oxide, iron oxide, magnesium oxide, sodium oxide, potassium oxide, and sulfate. Further, the reagent comprises lime either as CaO or Ca(OH) | 01-27-2011 |
| 20120164042 | Systems and Methods for Enhancing Rates of Carbonation of Peridotite - Methods and systems for enhancing rates of carbonation of peridotite both in situ and ex situ are disclosed. In some embodiments, the methods and systems include the following: fracturing a volume of peridotite; heating the volume of peridotite; injecting an adjustable flow of carbon dioxide into the volume of peridotite; injecting bicarbonate materials into the volume of peridotite; and forming carbonate with the volume of peridotite and the carbon dioxide in an exothermic reaction thereby generating a self-sustaining heat source, the heat source heating the volume of peridotite. | 06-28-2012 |
| 20140161692 | PRODUCTION METHOD FOR HIGH-PURITY CALCITE AND AMMONIUM SULPHATE BY USING GYPSUM - Provided is a recycling method for producing calcite and ammonium sulfate having a high purity of at least 95% and generated by means of a carbonation reaction for fixing carbon dioxide inside the crystal structure of a mineral, and in which waste gypsum is reacted with carbon dioxide, which is a greenhouse gas, such that the carbon dioxide is fixed as a stable mineral, and high-purity calcite and ammonium sulfate are produced as resultant products. | 06-12-2014 |
| 20140314642 | Method for extraction of beryllium from raw genthelvite (danalite, genthelvite, helvite) and bertrandite (chryosberl, euclase, bertrandite) mineral groups when processing the raw minerals (ores, concentrates) - The invention relates to non-ferrous metallurgy and can be used for extracting beryllium from genthelvite and bertrandtte groups when processing the raw minerals (ores, concentrates) by heap and vat leaching. The objective of the invention is to disclose a method of teaching beryllium from danalite (Fe | 10-23-2014 |
| 20140314643 | Methods and Systems for Controlled Conversion of Minerals to Pigmenting Elements - The present invention may provide talc calciner systems and methods to produce better and more efficient products by engineering a* and b* values for calcinated products perhaps by processing low iron talc in an indirectly heated, multiple zoned calciner which may progressively heat the feed supply at perhaps specifics residence times to produce a desired product. | 10-23-2014 |
| 20150098875 | PROCESS FOR EXTRACTING NATURAL HYDROXYAPTITE GRANULES FROM BOVINE BONE - A process is for extracting natural hydroxyapatite from bone in order to make granules for a bone graft. The process involves soaking and boiling raw bone cubes in deionized water. Soaking and boiling removes lipids, blood components, and proteins and creates bone cubes. Next, washing the bone cubes in deionized water and drying the bone cubes. Then, segregating cancellous bone cubes with densified porous structure from those without densified porous structure. After that, soaking the cancellous bone cubes with densified porous structure in a solution of sodium hydroxide and a solution of hydrogen peroxide. Next, washing the cancellous bone cubes with densified porous structure in deionized water and drying the bone cubes. Then, sintering the cancellous bone cubes with densified porous structure. After that, fracturing the cancellous bone cubes with densified porous structure into the granules for the bone graft. | 04-09-2015 |
| 20150299823 | PROCESS FOR THE TREATMENT OF A SILICATE MINERAL - A process for the treatment of a silicate mineral, includes: preparing a first composition including an alkali metal magnesium orthosilicate and optionally either (i) magnesium oxide or (ii) an alkali metal silicate, by reaction, at a temperature from 500 to 1200° C., of an alkali metal carbonate compound, which compound is an alkali metal carbonate, an alkali metal bicarbonate or a mixture thereof, with a magnesium silicate, the molar ratio of alkali metal carbonate compound, expressed as alkali metal oxide of the formula R | 10-22-2015 |
| 20150322547 | ALKALI METAL AND/OR ALKALI EARTH METAL EXTRACTION METHOD - This alkali metal and/or alkali earth metal extraction method is superior in terms of cost and allows repeated use of the aqueous solution that extracts alkali metal and/or alkali earth metal from a solid. This method is for extracting alkali metal and/or alkali earth metal from a solid containing an alkali metal and/or alkali earth metal, and involves an elution step in which the solid is added to an amino acid-containing aqueous solution, and the alkali metal and/or alkali earth metal is eluted into the amino acid-containing aqueous solution. | 11-12-2015 |
| 20190144333 | HIGH TEMPERATURE HYDRATOR | 05-16-2019 |
| 423157000 | Ion exchanging or liquid-liquid extracting | 3 |
| 20090016944 | Hydrogen generator, Carbon dioxide and sulfate captor - This invention provides a means to produce on site Hydrogen to power fuel cells or Hydrogen engines storing the energy in Calcium metal. It continues by using the Calcium hydroxide byproduct of Calcium generated Hydrogen reaction to capture Carbon dioxide from exhaust situations, both moving and stationary as trucks and power plants. This reaction goes to completion with the sedimentation of Calcium carbonate, which may be useful to the cement industry as a component of their products, or it could be used to capture sulfates in stack gas. Either Calcium carbonate or Calcium sulfate may be electrolyzed to recover metallic Calcium, which is not readily available on the market at this time. Solar power, water wheels, resistive gym apparatus, wind power generation of electrical energy as well as unused power from power plants can electrolyze water into Hydrogen and Oxygen. The Hydrogen is passed through and over Calcium carbonate freeing the Calcium as pure metal and releasing as gases water and Carbon dioxide, which, if fed into a greenhouse, will make plants grow rapidly and during daylight, release heavily Oxygenated air from the greenhouse environment. Oxygen can be sold to health, scuba and industrial businesses. These reactions are commercially feasible making Hydrogen propulsion as with a Hydrogen piston engine and fuel cell driving for generating power safer because large amounts of Hydrogen do not have to be carried or on hand during use or down times. Replaceable vessels for both Hydrogen generation and Carbon dioxide capture systems provide viable options for both transportation and stationary Hydrogen consumption applications. | 01-15-2009 |
| 20120134902 | METHOD OF FIXING CARBON DIOXIDE - A method and system of fixing carbon dioxide is provided. After metal ion components are extracted from, e.g., natural mineral or steel slag through acid treatment, carbon dioxide is injected to fix carbon dioxide by carbonating the same. Since the procedure of pH adjustment is unnecessary, the reaction is carried out effectively and a continuous process is enabled. Accordingly, the disclosed method of fixing carbon dioxide enables effective removal of carbon dioxide produced from the steelmaking industry, thereby significantly reducing greenhouse gas emission and allowing recycling of the discarded steel slag. | 05-31-2012 |
| 20160016809 | METHOD FOR MANUFACTURING CARBONATE - Methods are disclosed for manufacturing magnesium carbonate and calcium carbonate, specifically manufacturing refined carbonates such as magnesium carbonate (MgCO3) and calcium carbonate (CaCO3) through processes including electrolysis, carbon dioxide injection, and calcium oxide (CaO) or calcium hydroxide (Ca(OH)2) injection in seawater. | 01-21-2016 |
| 423157200 | Phosphate rock or ore | 3 |
| 20110256040 | PROCESS FOR MANUFACTURING PHOSPHOROUS TRICHLORIDE, PHOSPHOROUS PENTACHLORIDE AND CEMENT - A process for manufacturing phosphorous trichloride, phosphorous pentachloride and cement comprising of heating at elevated temperature of 1100° C. to 1500° C. pulverised mixture of phosphate ores, carbonaceous substances, silica and/or alumina and treating the resultant gaseous products with chlorine in the ratio of 1 to 5 moles of chlorine per mole of phosphorous oxide contained in the phosphate ores while maintaining the temperature between 400° C. to 1000° C. by cooling and thereafter firstly separating gaseous mixture of primarily phosphorous trichloride and phosphorous pentachloride, from cement and later separating phosphorous trichloride and phosphorous pentachloride, both separations by known methods. | 10-20-2011 |
| 423157300 | Acid treatment | 2 |
| 20120087850 | Process for Obtaining Apatite Concentrates by Flotation - The present invention, named Bunge/Fosfertil process, is applicable at different lithologies of phosphate ore with carbonated-silica matrix from igneous and sedimentary sources, i.e., consists of comminutioning the ore by crushing, homogenization, milling and disliming, prior to the apatite flotation. The dislimed and milled ore pulp with solids concentration above 40%, being initialy conditioned with a depressor reactant, a vegetable source polymer gelled with sodium hydroxide solution; and subsequently, submitted to a conditioning with a scavenger reactant of the sulphosuccinate or sulphosuccinamate groups. This pulp conditioned with reactants goes to the apatite flotation in a circuit comprising the “rougher”, “scavenger”, “cleaner” and “recleaner” steps. In all steps of the circuit flotation the carbon dioxide gas may be added up to saturation of such gas in the temperature and pressure conditions of the pulp. The system to generate bubbles for flotation works independently, being feed with atmospheric air for the self-aspirated machines or compressed air for the flotation cells with air insufflation and notation columns. The final concentrate of apatite is the flotated portion of the last cleaning step of the flotation circuit. | 04-12-2012 |
| 20150086451 | ADSORBENT AGENT, COMPOSITION FOR BIOFLOTATION AND BIOFLOTATION PROCESS FROM APATITE-QUARTZ SYSTEM - The present invention discloses the use of | 03-26-2015 |
| 423157500 | Phosphorous or phosphorous compound containing waste as feed | 1 |
| 20120288425 | METHOD FOR PRODUCING PHOSPHATES AND PHOSPHATE-CONTAINING COMPOUNDS, PARTICULARLY ALKALINE EARTH PHOSPHATES, ALKALINE EARTH SILICOPHOSPHATES, OR ALKALINE EARTH OXIDES - A method for producing phosphates and/or compounds containing phosphates is provided, in particular alkaline-earth phosphates, alkaline-earth silicophosphates, and alkaline-earth oxides, comprising the following steps: (a) heating bones and/or fish bones or a composition of said components in a pyrolysis process in the absence of oxygen and under reductive conditions at temperatures between 500 and 1100° C., wherein among other things high-energy gases, vapors, and carbon are produced, (b) subsequently combusting the carbon produced in step (a) under oxidative conditions in an oxidation step, wherein an inorganic radical of alkaline-earth carbonates, alkaline-earth oxides, and alkaline-earth phosphates is produced. | 11-15-2012 |
| 423158000 | Forming insoluble substance in liquid | 34 |
| 20090280044 | Continuous process for purification of brine - A continuous process for purification of brine contaminated with alkaline earth metals. The process comprises combining the brine with an aqueous solution containing at least one of an alkali metal hydroxide and an alkali metal carbonate with efficient mixing by a micro-mixing device. | 11-12-2009 |
| 20100166627 | USE OF HYDROPHOBINS AS ADDITIVES IN THE CRYSTALLIZATION OF SOLIDS - Use of hydrophobins as auxiliaries in the crystallization of solids, in particular the use for producing gypsum from an aqueous phase. | 07-01-2010 |
| 20100254867 | Process to Produce Sodium Sulfate and Magnesium Hydroxide - This invention refers to a novel process to obtain magnesium hydroxide and sodium sulfate from a solid raw material, which contains sodium and magnesium soluble salts, preferably in the form of sulfates, coming from a natural source or as a byproduct of an industrial process. The process consisting in the conditioning of the raw material to guarantee the correct concentrations of sodium and magnesium sulfates that is subjected to a salting-out crystallization when mixed with sodium sulfate obtaining sodium sulfate; the resulting solution is subjected to an alkali treatment to precipitate the magnesium hydroxide and the mother liquor is fed to a regeneration stage of the alkali used in the precipitation of the magnesium hydroxide as well in the sodium sulfate solution for the crystallization. The crystallization can be performed as a multistage process countercurrent to increase the purity of sodium sulfate. | 10-07-2010 |
| 20110110831 | MULTI-STAGE CRYSTALLIZATION APPARATUS AND METHOD - A crystallizer system for forming solid crystals includes a vessel defining a cylindrical sidewall, a sparge device located at a bottom of the vessel, a plurality of impellers attached to a shaft, and a plurality of redistribution funnel assemblies vertically spaced apart. Each funnel assembly may be positioned underneath a respective impeller of the plurality of impellers. Each funnel assembly may include a funnel, a disc attached to the shaft such that the disc rotates with the impellers, and a channel extending radially inward from a location near the sidewall. The channel may be adapted to direct gas bubbles from the sidewall to a location near blade outer edges of the respective impeller A lower edge of the funnel and the disc may define a lower gap therebetween, such that solid particles falling from within the funnel are directed out of the lower gap when the disc is rotated. | 05-12-2011 |
| 20140127096 | MAKING MINERAL SALTS FROM VARIOUS SOURCES - Hydrometallurgical systems, methods, and compositions are described in which organic amine-based lixiviants are utilized in the selective recovery of alkaline earth elements. The lixiviant can be regenerated and recycled for use in subsequent iterations of the process. Multiple alkaline earth elements can be recovered from a sample in parallel or in serial applications of the disclosed methods. | 05-08-2014 |
| 423159000 | Subjecting mixture to pressure, vacuum, or steam | 1 |
| 20120082602 | METHOD FOR INDUSTRIAL MANUFACTURE OF PRECIPITATED CALCIUM CARBONATE (CaCO3) FROM CARBONATE BEARING ROCKS - Method for industrial manufacture of pure (precipitated) CaCO | 04-05-2012 |
| 423160000 | Agitating during reaction | 2 |
| 20130243674 | METHODS AND SYSTEMS FOR UTILIZING WASTE SOURCES OF METAL OXIDES - Methods are provided for producing a composition comprising carbonates, wherein the methods comprise utilizing waste sources of metal oxides. An aqueous solution of divalent cations, some or all of which are derived from a waste source of metal oxides, may be contacted with CO2 and subjected to precipitation conditions to provide compositions comprising carbonates. In some embodiments, a combustion ash is the waste source of metal oxides for the aqueous solution containing divalent cations. In some embodiments, a combustion ash is used to provide a source of proton-removing agents, divalent cations, silica, metal oxides, or other desired constituents or a combination thereof. | 09-19-2013 |
| 20160376149 | EXTRACTION OF HYDROXYAPATITE FROM FISH SCALES EMPLOYING IONIC LIQUIDS - An exemplary embodiment provides a method for extracting hydroxyapatite. The method includes washing fish scales with water, drying the washed fish scales, grinding the washed fish scales, mixing the ground fish scales with an ionic liquid, and centrifuging the mixture of the ground fish scales and the ionic liquid to collect a hydroxyapatite powder as a precipitate. | 12-29-2016 |
| 423161000 | Specified particle size used or made | 3 |
| 20110110832 | MAGNESIUM RECYCLING AND SULPHUR RECOVERY IN LEACHING OF LATERITIC NICKEL ORES - The present invention resides in a process of recovering nickel and cobalt, regenerating the main raw materials, said process including the steps of: granulometric separation; leaching; neutralization; MHP production in only one stage and the pressure crystallization of magnesium sulphite. | 05-12-2011 |
| 20140044619 | PROCESS FOR CONVERTING FGD GYPSUM TO AMMONIUM SULFATE AND CALCIUM CARBONATE - A continuous countercurrent flow process for converting FGD gypsum to ammonium sulfate and calcium carbonate including countercurrent flows with internal recycle of liquids to maximize the purity of reaction products while minimizing reaction times, and further include embodiments of the process that provide a yield of both ammonium sulfate and calcium carbonate to be 97 to 100%, and embodiments that provide for processes having a total time of reaction being 8 to 12 minutes, the invention further including processes for removing contaminants from the FGD gypsum employing an acid rinse process and/or a slurry tank reactor process. | 02-13-2014 |
| 20140286842 | RECOVERY METHOD FOR A CONTINUOUS CALCIUM EXTRACTION AND PCC PRODUCTION - A method of mineralizing calcium from industrial waste comprising extracting calcium ions from a suspension of calcium rich granular particles and aqueous ammonium chloride to form a calcium-rich first fraction and a heavy second fraction. The heavy second fraction is separated from the first fraction and the calcium-rich first fraction is carbonated with a gas comprising carbon dioxide to form a suspension of precipitated calcium carbonate and aqueous ammonium chloride. The precipitate is separated from the aqueous ammonium chloride by centrifugal means and the separated heavy second fraction comprises an enriched weight percent of iron. | 09-25-2014 |
| 423162000 | Nitrating or ammoniating | 3 |
| 20100172812 | PROCESS FOR THE PREPARATION OF MAGNESIA (MGO) - The present invention provides an improved process for the preparation of MgO of high purity >99% from salt bitterns via intermediate formation of Mg(OH) | 07-08-2010 |
| 20130315805 | Process For Simultaneous Production Of Potassium Sulphate, Ammonium Sulfate, Magnesium Hydroxide And/Or Magnesium Oxide From Kainite Mixed Salt And Ammonia - The present invention provides an integrated process for the recovery of sulphate of potash (SOP), ammonium sulphate and surface modified magnesium hydroxide and/or magnesium oxide utilizing kainite mixed salt and ammonia as the only consumable raw materials. The process involves treating kainite mixed salt with water to obtain solid schoenite and a schoenite end liquor. The latter is desulphated using CaCl | 11-28-2013 |
| 20150298985 | BOUSSINGAULTITE PRODUCTION PROCESS FROM LIQUID EFFLUENTS CONTAINING MAGNESIUM SULPHATE - Describes a method of producing a magnesium sulfate and hydrous ammonia double salt or Boussingaultite ((NH | 10-22-2015 |
| 423163000 | Halogenating | 1 |
| 20120171091 | METHOD OF MAKING PURE SALT FROM FRAC-WATER/WASTEWATER - The present invention relates to a method for making pure salt comprises recapturing post-drilling flowback water from hydro-fracturing; removing oil from the flowback water; filtering the flowback water using an ultra filter with a pore size of about 0.1 microns or less to remove solid particulates and large organic molecules, such as benzene, ethylbenzene, toluene, and xylene, from the water; concentrating the flowback water to produce a brine that contains from about 15 wt % to about 40 wt % of salt relative to the total weight of the flowback brine; performing one or more chemical precipitation process using an effective amount of reagents to precipitate out the desired high quality commercial products, such as, barium sulfate, strontium carbonate, calcium carbonate; and crystallizing the chemically treated and concentrated flowback brine to produce greater than 99.5% pure salt products, such as sodium and calcium chloride. | 07-05-2012 |
| 423164000 | Hydroxylating or hydrating | 7 |
| 20090010827 | Process for Sequestration of Carbon Dioxide - A process for sequestration of carbon dioxide comprising the following steps: (a) dispersing solid waste material comprising calcium oxide and a calcium-comprising mixed oxide in water to dissolve at least part of the calcium oxide and to form calcium oxide-depleted solid waste material in a calcium hydroxide solution; (b) separating the calcium hydroxide solution from the calcium oxide-depleted solid waste material; (c) converting the calcium hydroxide in the separated calcium hydroxide solution in precipitated calcium carbonate; and (d) contacting an aqueous slurry of the calcium oxide-depleted solid waste material with carbon dioxide for mineral carbonation of the carbon dioxide to form carbonated solid waste material. | 01-08-2009 |
| 20090148365 | Recovery of Solid Magnesium Sulfate Hydrate - A process for recovering solid magnesium sulfate hydrate from a source of magnesium sulfate in solution includes the steps of providing a source of magnesium sulfate in solution that is derived from part of a process associated with the leaching of a metal containing ore or concentrate; adding sulfuric acid to the magnesium sulfate solution to salt out the magnesium sulfate as magnesium sulfate hydrate crystals in a salting process, and partially diluting the sulfuric acid; recycling the diluted sulfuric acid for use in the process of leaching the metal containing ore or concentrate; and recovering the solid magnesium sulfate crystals. | 06-11-2009 |
| 20130343972 | METHOD FOR TREATING LIQUID EFFLUENTS AND RECOVERING METALS - A method for treating liquid effluents and recovering metals is described, which comprises the steps of: a) liquid effluent equalization; b) sulphide addition and precipitation of metals in the form of metal sulphides; c) solid/liquid separation of the metal sulphides produced in step (b) and formation of a metal-free liquid phase; d) addition of a 50 to 250 g/L amine solution to the liquid phase precipitating magnesium in the form of magnesium hydroxide (Mg(OH)2); and e) recovery of amine by stripping and rectification. | 12-26-2013 |
| 20140030173 | PROCESS FOR CONTINUOUS MODIFICATION OF DIHYDRATE GYPSUM AND MODIFIED DIHYDRATE GYPSUM OBTAINED BY THE PROCESS - A process for the continuous modification of dihydrate gypsum includes calcining dihydrate gypsum into hemihydrate gypsum and recrystallizing the hemihydrate gypsum in an aqueous slurry to convert the hemihydrate gypsum into modified dihydrate gypsum of different crystalline form. The aqueous slurry in a recrystallization reaction tank is maintained at a constant temperature under stirring, and a feed rate of the hemihydrate gypsum to the recrystallization reaction tank and a discharge rate of the recrystallized dihydrate gypsum are controlled to substantially equal. Dihydrate gypsum as a starting raw material can be converted into high-purity, modified dihydrate gypsum of large crystals by recrystallizing the starting dihydrate gypsum after it is once calcined into hemihydrate gypsum. | 01-30-2014 |
| 20140186241 | PRECIPITATED CALCIUM CARBONATE FROM PULP MILL WASTE HAVING AN IMPROVED BRIGHTNESS, METHOD FOR THE PRODUCTION AND USE THEREOF - The present invention relates to a process for the production of a precipitated divalent metal ion carbonate product from a divalent metalion carbonate which was recovered from waste, the precipitated divalent metal ion carbonate product having an improved brightness, the process comprising the steps of: providing a low-purity divalent metal ion carbonate material, the divalent metal ion carbonate material being recovered from waste; calcining the divalent metal ion carbonate material in order to obtain a divalent metal ion oxide; slaking the divalent metal ion oxide in order to obtain an aqueous suspension of a divalent metal ion hydroxide; carbonating the aqueous suspension of the divalent metal ion hydroxide with a carbon dioxide containing compound in order to obtain fine precipitated divalent metal ion carbonate particles; posttreating the fine precipitated divalent metal ion carbonate particles to obtain fine discrete precipitated divalent metal ion carbonate particles; adding the fine discrete precipitated divalent metal ion carbonate particles to an aqueous suspension of divalent metal ion hydroxide that was obtained by slaking high-purity divalent metal ion hydroxide in order to obtain a resulting reaction mixture; and carbonating the resulting reaction mixture in order to obtain the precipitated divalent metal ion carbonate product having an improved brightness. | 07-03-2014 |
| 20150368154 | Method for the Dry Slaking of Calcium and Magnesium Oxides from Calcomagnesian Compounds - The invention relates to a method for the dry slaking of calcium oxides and magnesium from calcomagnesian compound containing preferably at least 10 wt. % of MgO in relation to the total weight of said calcomagnesian compound, in which calcomagnesian compound is supplied to a slaking vessel, a slaking aqueous phase is supplied to the slaking vessel, followed by slaking the calcomagnesian compound delivered to the slaking vessel, by means of the slaking aqueous phase, and forming hydrated solid particles of calcium hydroxides and magnesium, in the presence of an additive. The invention also relates to the compound produced in this way. | 12-24-2015 |
| 20150376059 | Method for the Wet Slaking of Calcium and Magnesium Oxides from Calcomagnesian Compounds - A method is shown for the slaking of calcium oxides and magnesium from calcomagnesian compound containing at least 10 wt. % of MgO in relation to the total weight of said calcomagnesian compound, in which a slaking aqueous phase is supplied to a slaking device, and slaking the compound containing anhydrous dolomite delivered to the slaking device, by means of the slaking aqueous phase, forming hydrated solid particles of Mg(OH) | 12-31-2015 |
| 423165000 | Carbonating | 11 |
| 20110033350 | PROCESS FOR RECOVERING SUBSTANCES FROM HIGH SALINITY LIQUIDS - The present disclosure provides a process for recovering from high salinity liquid a substance comprising a selected alkaline earth carbonate salt, the process comprises (i) adding to said high salinity liquid a reagent comprising a solution of an alkali metal carbonate in an amount sufficient to allow precipitation of said substance in said liquid, while continuously introducing into the liquid a gas whereby a high degree of precipitate is formed in the liquid; and (ii) isolating said precipitate from the liquid, wherein said precipitate comprising the alkaline earth carbonate comprising substance in an essentially purified form (at least 95% w/w degree of purity). Also provided are a unit and a system constructed and operative for performing the process, preferably continuously. | 02-10-2011 |
| 20120189515 | PRODUCTION OF CALCIUM CARBONATE - A method of producing calcium carbonate from lime comprises the steps of: (i) providing an aqueous solution comprising 10% to 35% by weight of dissolved polyhydroxy compound and 1% to 5% by weight of dissolved calcium hydroxide (expressed as Ca(OH) | 07-26-2012 |
| 20130078168 | SYSTEM AND METHOD FOR CARBON DIOXIDE SOLIDIFICATION - Disclosed is a method for solidifying carbon dioxide into carbonate, in which carbon dioxide is stably converted into and solidified into carbonate (mineral facies) by using steel slag or natural mineral by extracting an alkali component by supplying an ammonium salt solvent as an extraction solvent to raw slag and injecting carbon dioxide into an extract solution supplied to a carbonation reactor to produce carbonate precipitate from the extract solution through the induction of a conversion reaction of the carbon dioxide into the carbonate precipitate. Then after the above two step are performed at least one an acetic acid solvent is supplied as an extraction solvent to the raw slag so as to finally extract an alkali component; and carbon dioxide is injected into an extract solution to produce carbonate precipitate from the extract solution through the induction of a conversion reaction of the carbon dioxide into the carbonate precipitate. | 03-28-2013 |
| 20130164198 | Recovery Method for a Continuous Calcium Extraction and PCC Production - A method of mineralizing calcium from industrial waste comprising extracting calcium ions from a suspension of calcium rich granular particles and aqueous ammonium nitrate to form a calcium-rich first fraction and a heavy second fraction. The heavy second fraction is separated from the first fraction and the calcium-rich first fraction is carbonated with a gas comprising carbon dioxide to form a suspension of precipitated calcium carbonate and aqueous ammonium nitrate. The precipitate is separated from the aqueous ammonium nitrate by centrifugal means and the separated heavy second fraction comprises an enriched weight percent of iron. | 06-27-2013 |
| 20140010743 | SULFATE-BASED ELECTROLYSIS PROCESSING WITH FLEXIBLE FEED CONTROL, AND USE TO CAPTURE CARBON DIOXIDE - A method including electrolysis processing using sulfate-based electrolytes includes precipitating sodium sulfate decahydrate from a salt solution and then redissolving sodium sulfate decahydrate to prepare feed of electrolyte solution for the electrolysis processing. Front-end processing may be used to treat mixed salt solutions, including brine solutions. Calcium sulfate reagent may provide a sulfate source to regenerate electrolyte solution following carbon capture, and with carbon dioxide being sequestered in the form of calcium carbonate. | 01-09-2014 |
| 20140044620 | METHOD FOR PRODUCING PRECIPITATED CALCIUM CARBONATE USING FOWL EGG SHELLS - The present invention relates to a method for producing precipitated calcium carbonate using fowl egg shells such as chicken egg shells. More particularly, the method comprises: a heat treatment step of heating fowl egg shells; a grinding step of grinding calcium oxide generated in the heat treatment step; a dry-quenching step of feeding the ground calcium oxide into a thermo-hygrostat to convert the ground calcium oxide into dry calcium hydroxide powder; a carbonizing step of mixing the dry calcium hydroxide powder prepared in the dry-quenching step with an organic solvent and feeding carbon dioxide generated in the heat treatment step into the mixture; and a filtering and drying step of filtering and drying the calcium carbonate obtained in the carbonizing step. | 02-13-2014 |
| 20140065039 | Extraction of alkali metals and/or alkaline earth metals for use in carbon sequestration - A method of extracting an alkali metal and/or an alkaline earth metal from a mineral including an alkali metal and/or an alkaline earth metal, or a rock containing the mineral, the method including contacting the mineral, with an aqueous composition including formic acid, and to their use in carbon sequestration. | 03-06-2014 |
| 20140134084 | REFINING AGENTS FOR ALKALINE EARTH PRODUCTION - Hydrometallurgical systems, methods, and compositions are described in which organic amine-based lixiviants are utilized in the selective recovery of alkaline earth elements. The lixiviant can be regenerated and recycled for use in subsequent iterations of the process. Multiple alkaline earth elements can be recovered from a sample in parallel or in serial applications of the disclosed methods. | 05-15-2014 |
| 20140341792 | INSTALLATION FOR THE PURIFICATION OF MINERALS, PIGMENTS AND/OR FILLERS AND/OR THE PREPARATION OF PRECIPITATED EARTH ALKALI CARBONATE - The present invention relates to an installation for the purification of minerals, pigments and/or fillers and/or the preparation of precipitated earth alkali carbonate and/or mineralization of water and to the use of such an installation for the purification of minerals, pigments and/or fillers and/or mineralization of water and/or the preparation of precipitated earth alkali carbonate. | 11-20-2014 |
| 20150125367 | Systems and Methods for Alkaline Earth Production - Hydrometallurgical systems, methods, and compositions are described in which amine-based lixiviants are utilized in substoichiometric amounts to recover alkaline earths from raw or waste materials. The lixiviant can be regenerated and recycled for use in subsequent iterations of the process or returned to a reactor in a continuous process. Extraction of the alkaline earth from the raw material and precipitation of the extracted alkaline earth is performed in the same reactor and essentially simultaneously. | 05-07-2015 |
| 20150315676 | PROCESS FOR THE TREATMENT OF SOLID ALKALINE RESIDUE COMPRISING CALCIUM, HEAVY METALS AND SULPHATE - The invention relates to a process for the treatment of solid alkaline residue comprising calcium, heavy metals and sulphate, the process comprising: a)reacting the solid alkaline residue with carbon dioxide by contacting the solid alkaline residue with a carbon dioxide containing gas to obtain carbonated solid material; and c)washing the carbonated solid material with an aqueous stream to obtain washed solid material and wash water comprising calcium and sulphate and precipitating at least part of the calcium in the wash water as calcium carbonate. | 11-05-2015 |
| 423166000 | Sulfating | 1 |
| 20140334995 | METHODS OF PROCESSING SOLUTIONS OF POTASSIUM SULFATE AND MAGNESIUM SULFATE, METHODS OF PRODUCING POTASSIUM SULFATE, AND RELATED SYSTEMS - Methods of processing an aqueous solution comprising potassium sulfate and magnesium sulfate include crystallizing K | 11-13-2014 |
| 423168000 | Mixing fuel with starting mixture | 1 |
| 20140334996 | VENTURI REACTOR AND METHOD FOR PRODUCING USABLE BY PRODUCTS USING VENTURI REACTOR - A process for producing a usable product in a reactor comprising introducing co-reactants comprising a fuel source and oxygen into a first section through an inlet, the fuel source comprising carbon; combusting at least a portion of the fuel source and oxygen in an exothermic reaction in the first section using a burner; transferring the co-reactants through a second section that includes a throat having a size that is smaller than a size of the first section, such that a vacuum is induced and a velocity of the co-reactants increases; transferring the co-reactants into a third section that is downstream from the throat and includes an inner wall having a size that is greater than the size of the throat; depositing at least a portion of the uncombusted carbon and a metal oxide along the inner wall, wherein the metal oxide is introduced into at least one of the sections; converting the deposited metal oxide into the usable product in a carbothermic reduction reaction within a molten slag along the inner wall at a temperature of at least 1600° C. | 11-13-2014 |
| 423170000 | Treating impure sulfate (e.g., barite, etc.) | 5 |
| 20080226522 | Barium Sulfate Product - This invention generally relates to a barium sulfate product particularly useful as an X-ray contrast agent in preparations administered for examination of the gastrointestinal tract and to processes for making the product from naturally occurring barite ore containing barium sulfate crystals and gangue materials. The process includes treating or contacting the barium sulfate-containing particles obtained from barite ore with a fluidizing agent in a liquid medium to remove gangue materials present therein. | 09-18-2008 |
| 20090148366 | Magnesium Oxide Recovery - A process of recovering magnesium oxide from a source of magnesium sulfate includes the steps of providing a source of magnesium sulfate in solution that is derived from part of a process that is associated with the leaching of a metal containing ore or concentrate; converting the magnesium sulfate in solution to solid magnesium sulfate; contacting the solid magnesium sulfate with elemental sulfur in a reducing atmosphere; and recovering the magnesium as magnesium oxide, and the sulfur as sulfur dioxide gas. | 06-11-2009 |
| 20090291037 | METHOD OF INERTISING THE IMPURITIES IN PHOSPHOGYPSUM - The invention pertains to a method of inertising free soluble impurities of phosphates and/or fluoride ions, in phosphogypsum, for use in commercial and industrial applications. The Phosphogypsum is pre-conditioned over an extended period of time separately or treated along with standard constituents by spraying, interblending or intergrinding during the process of manufacture, with alkyl, alkenyl and/or alkanol derivatives of ammonia, either individually or in combination with one another, to form stable intermediary phosphates and/or fluoride salts of the derivatives of ammonia. | 11-26-2009 |
| 423171000 | Calcining gypsum | 2 |
| 20090208392 | PROCESS FOR PRODUCING ALPHA-HEMIHYDRATE GYPSUM - A process for producing alpha-hemihydrate gypsum from dihydrate gypsum includes feeding a slurry comprising the dihydrate gypsum and water into a heating tube, heating the heating tube at a temperature effective to generate steam and pressure from the water, wherein the steam and pressure are effective to convert the dihydrate gypsum to the alpha-hemihydrate gypsum, and withdrawing the alpha-hemihydrate gypsum from the heating tube. | 08-20-2009 |
| 20110033351 | SYSTEM AND METHOD FOR CALCINING GYPSUM | 02-10-2011 |
| 423173000 | Treating impure carbonate (e.g., oyster shells, etc.) | 10 |
| 20160060132 | Method and Apparatus for the Enhanced Separation of Calcium Eggshell from Organic Membrane - A method and system is provided to separate calcium carbonate inorganic eggshell from the inner lining of organic protein-based membrane in eggshell by-product. The method involves three phases: mechanical agitation/separation, functional chemical digestion and refining chemical digestion. In the mechanical stage, agitation and sieving are used to remove large pieces, and the majority of, membrane material. In the functional chemical digestion stage, the by-product is processed through at least one basic solution to remove additional organic membrane and impurities. In the refining chemical digestion stage, the remaining organic membrane and impurities are removed. The purified calcium carbonate is then rinsed and dried, in preparation for further refinement and processing to finished goods specifications. | 03-03-2016 |
| 423175000 | Calcining | 9 |
| 20110229387 | Method for Operating a Regenerative Shaft Furnace for Producing Lime - The invention relates to a method for producing quick lime from lime stone in a continuous regenerative shaft kiln, characterised in that, starting with standard conditions of excessive combustion air for the operation of this kiln, it especially includes a step where the excessive combustion air is progressively reduced until a content greater than 1000 ppm (in volume) of carbon monoxide is reached in the connection flue between the tanks. An increase in the content of gaseous sulphur dioxide is then observed in the gas flue, with respect to a kiln operated in standard conditions. | 09-22-2011 |
| 20130039824 | METHOD OF PRODUCING SODA ASH AND CALCIUM CHLORIDE - The method of producing soda ash and calcium chloride provides an environmentally friendly method of producing soda ash and calcium chloride without the production of waste and hazardous byproducts. The method of producing soda ash and calcium chloride is initiated with a volume of brine, which is ammoniated with gaseous ammonia to form ammoniated brine. Limestone is heated to produce calcium oxide and carbon dioxide. The ammoniated brine is reacted with the carbon dioxide to produce sodium bicarbonate, ammonium chloride and a brine effluent. The sodium bicarbonate is then calcined and decomposed to produce soda ash and gaseous carbon dioxide. The calcium oxide is reacted with the ammonium chloride to produce calcium chloride, water and ammonia. The ammonia is recycled to be used in the initial step of ammoniating the brine. The water and the brine effluent are also recycled and used to provide the brine in the initial step. | 02-14-2013 |
| 20130084228 | METHOD OF PREPARING POROUS CARBONATE APATITE FROM NATURAL BONE - A method for preparing carbonate apatite from natural bones. The method includes obtaining cancellous bone particles; treating the bone particles with hot water and an organic solvent; repeating the treating step at least once; drying the bone particles; and heating the bone particles at 500° C. to 620° C. for 10 to 50 hours. | 04-04-2013 |
| 20130336859 | PRODUCTION OF HIGH PURITY PRECIPITATED CALCIUM CARBONATE - The present invention relates to a process for the preparation of precipitated calcium carbonate comprising the steps of a) providing and calcining calcium carbonate comprising material; b) slaking the reaction product obtained from step a) with an aqueous ammonium chloride solution; c) separating insoluble components from the calcium chloride solution obtained from step b); d) carbonating the calcium chloride solution obtained from step c); e) separating the precipitated calcium carbonate obtained from step d); the precipitated calcium carbonate obtained by this process, as well as uses thereof. | 12-19-2013 |
| 20140044621 | METHOD AND ARRANGEMENT FOR BURNING LIME MUD - The present invention relates to a method and an arrangement for burning lime mud into lime in a lime kiln The lime mud flows counter-currently to flue gases from a feed end to a firing end and the fuel used is flue gas that is produced by gasifying a fuel in the presence of combustion air in a gasifier. The combustion air for gasification is preheated with heat generated in lime mud combustion. The arrangement is provided with a conduit between the lime kiln and the gasifier for leading air from the lime kiln into the gasifier as combustion air. At least a portion of the combustion air for gasification is preheated with heat generated in the lime mud combustion so that air is led into cooling of lime obtained in the combustion and further into the kiln, from or through the firing end of which air is taken into the gasification. | 02-13-2014 |
| 423177000 | With agitating or at specified temperature | 4 |
| 20110008227 | System and Method for the Calcination of Minerals - A system and method for the calcination of minerals. The system comprises a vertically disposed reactor segment configured to impart horizontal forces on particles passing through the reactor segment in a vertical direction; an injector unit for receiving granular feedstock, the injector unit being disposed at a top portion of the reactor segment, whereby granules of the feedstock move through the reactor segment in a granular flow under at least one of a group consisting of a force of steam, gravitational force and a centrifugal force; a reactor heat exchange unit thermally coupled to a wall of the reactor segment for providing heat to the flowing granules inside the reactor segment through heat transfer through the wall of the reactor segment; one or more inlets formed in the reactor segment for introducing a superheated gas into the reactor segment to create conditions of a gas-solid multiphase system; and one or more exhaust openings formed in the retort segment such that gas products are at least partially flushed from the reactor segment under the flow of the superheated gas from the inlets to the exhaust openings. | 01-13-2011 |
| 20120100050 | PRODUCTION OF CALCINED LIME FROM NATURAL CHALK MATERIAL IN A ROTARY KILN - Disclosed is a method for calcining a natural chalk powder within a rotary kiln. The powder is inserted into the kiln accompanied by an additive that promotes nodulization of the powder to thereby facilitate the treatment of the chalk powder within the rotary kiln. | 04-26-2012 |
| 20130136674 | Powder Lime Calcining Process and System - A powder lime calcining process comprises: transporting fine granules of limestones having a water content less than 4%, and a granule size less than 15 mm, from a raw material storing bin to a small material bin, transporting the materials from the small material bin into an airflow pipe by a belt conveyer, heating and drying the materials, sieving the materials by a sieving device, transporting granules into a cyclone cylinder deduster and a clothbag deduster in turn by airflow pipes, the fine powders of limestones after dedusted are transported into an intermediate bin; the materials within the intermediate bin are transported to four preheating cyclone cylinders by a pneumatic lift pump and airflow pipes, and are preheated and separated; the materials after separated are transported into three cooling cyclone cylinders for cooling and separating the materials, finally transported into a finished product bin by a finished product transporting system. | 05-30-2013 |
| 20140112848 | METHOD FOR BURNING PELLETIZED GOOD - According to the invention, the method for burning fragmented material is carried out in at least one shaft which comprises a preheating zone, a combustion zone and a cooling zone, coal having a swelling index>1 being supplied via combustion lances, and the temperature of the coal in the combustion lances being maintained below a temperature value at which melting phases of the coal used are formed. | 04-24-2014 |
