| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 423111000 | Group IIIA metal or beryllium (Al, Ga, In, Tl, or Be) | 61 |
| 20090028766 | High Purity Anhydrous Aluminium Chloride and Process for Production Thereof - The present invention provides high purity anhydrous aluminium chloride which is freed as completely as possible from all the major impurity components (impurity metals) derived from starting aluminium used in industrial production of anhydrous aluminium chloride, wherein a content of the major impurity components except gallium (Ga), such as Na, K, Si, Fe, etc. is 1 ppm or less, and a purity of the anhydrous aluminium chloride as determined by subtracting a total content of the impurity components is 99.99% by weight or more, preferably 99.999% or more, and a process for production thereof. | 01-29-2009 |
| 20090130006 | USE OF POLYOLS AS SCALE CONTROL REAGENTS IN THE MINING PROCESSES - In the mining process, linear, branched, hyperbranched or dendrimeric polyols or mixtures thereof are employed as process stabilization aids for aqueous solutions and, or suspensions of metal salts. A specific application area of the polyols is the stabilization of bauxite liquor in the Bayer process of producing alumina from bauxite. | 05-21-2009 |
| 20100135877 | Method for removing metal impurity from quartz component part used in heat processing apparatus of batch type - A method for using a heat processing apparatus of a batch type includes performing a preparatory process for removing aluminum present as a metal impurity from a quartz inner surface of a process container, and performing a main heat process on product substrates held on a holder member in the process container after the preparatory process. The preparatory process includes placing a plurality of dummy substrates for allowing the metal impurity to be deposited thereon inside a process container with no product substrates placed therein; then, supplying a chlorine-containing gas and water vapor into the process container and heating the quartz inner surface of the process container at a process temperature, thereby applying a baking process onto the quartz inner surface to discharge the metal impurity from the quartz inner surface and deposit the metal impurity onto the dummy substrates; and then, unloading the dummy substrates with the metal impurity deposited thereon from the reaction container. | 06-03-2010 |
| 20120195814 | METHOD OF TREATING AN ALKALINE GRANULAR CARBONATABLE MATERIAL - The invention concerns a method of treating an alkaline granular carbonatable material which contains aluminium metal and which has in particular a pH of at least 10. The method comprises an oxidation step wherein at least a portion of said aluminium metal is oxidised by contact with moisture. The aluminium should be oxidised to avoid swelling problems when using the granular material as aggregate. In the method according to the invention this oxidation is accelerated by providing at least one oxidising agent in said moisture, which oxidising agent has a higher redox potential than the water contained in said moisture. The method further comprises a carbonation step wherein the granular carbonatable material is at least partially carbonated to lower the pH thereof. In this way the formation of ettringite, which may also release aluminium ions which causing further swelling problems, can be avoided in the granular material or any ettringite present therein can be destabilised. | 08-02-2012 |
| 20130089478 | PROCESS TO OBTAIN POTASSIUM SULFATE FROM VINASSE - A process designed to obtain potassium sulfate from vinasse where such vinasse is mainly obtained as a by-product of ethyl alcohol and the like production distilleries. Such process consists in concentrating vinasse dry solids for their subsequent combustion in a recovery boiler and to obtain electric power by activating a vapor turbine and at the same time recover the melted minerals from the boiler floor to obtain a chemical conversion reaction from carbonates to sulfates. Such reactions produce mainly Potassium sulfate in economic and technically sustainable production rates. Moreover, this process neutralizes the harmful effects of the vinasse polluting residue. | 04-11-2013 |
| 20160108253 | DEGRADATION-RESISTANT SCALE INHIBITORS - Methods for reducing aluminosilicate containing scale in an alumina recovery process involving treating an alumina recovery process equipment surface with a degradation-resistant scale inhibiting composition having high ionic strength prior to exposure to an alumina recovery process stream. | 04-21-2016 |
| 20160185608 | METHOD OF REMOVING HYDROUS SILICA FROM BENTONITE - A method of removing hydrous silica from bentonite includes irradiating an ultrasonic wave after preparing slurry by putting the bentonite and a sodium compound into distilled water or deionized water, adding the distilled water or the deionized water to the slurry, into which the ultrasonic wave is irradiated, to dilute and centrifugate the slurry, and drying a supernatant obtained through the centrifugation. | 06-30-2016 |
| 423112000 | Ion exchanging or liquid-liquid extracting | 6 |
| 20100150799 | PROCESSES FOR EXTRACTING ALUMINUM AND IRON FROM ALUMINOUS ORES - There are provided processes for extracting aluminum ions from aluminous ores. Such processes can be used with various types of aluminous ores such as aluminous ores comprising various types of metals such as Fe, K, Mg, Na, Ca, Mn, Ba, Zn, Li, Sr, V, Ni, Cr, Pb, Cu, Co, Sb, As, B, Sn, Be, Mo, or mixtures thereof. | 06-17-2010 |
| 20100226839 | Method For Recovery of Gallium - The present invention provides a novel process for the removal and recovery of gallium from a feed solution containing the gallium and copper. The process of the present invention utilizes a combination of a supported liquid membrane (SLM) and a strip dispersion to improve extraction of gallium while increasing membrane stability and decreasing processing costs. This novel process selectively removes gallium from feed solution containing the gallium and copper. | 09-09-2010 |
| 20110044869 | PROCESSES FOR EXTRACTING ALUMINUM AND IRON FROM ALUMINOUS ORES - There are provided processes for extracting aluminum ions from aluminous ores. Such processes can be used with various types of aluminous ores such as aluminous ores comprising various types of metals such as Fe, K, Mg, Na, Ca, Mn, Ba, Zn, Li, Sr, V, Ni, Cr, Pb, Cu, Co, Sb, As, B, Sn, Be, Mo, or mixtures thereof. | 02-24-2011 |
| 20140065037 | TREATMENT OF INDIUM GALLIUM ALLOYS AND RECOVERY OF INDIUM AND GALLIUM - There is provided a hydrometallurgical process of recovering indium and gallium values from mixtures thereof with other metal values for example recycled and scrap solar panel cells which comprises subjecting the mixture to strongly oxidizing acid conditions, preferably via the simultaneous addition of sulfuric acid and hydrogen peroxide to the leach vessel, so as to form indium and gallium salt species of at least the major proportion of the indium and gallium values in the mixture, extracting the indium and gallium values with an organic extractant by adjusting the pH so as to extract individually the indium and gallium values with the organic extractant, stripping indium and gallium values from the extractant using an acid and an alkaline solution respectively and recovering the indium and gallium values. | 03-06-2014 |
| 20140301919 | MIXED CHLORIDE PROCESS FOR THE EXTRACTION OF ALUMINA - A process for the extraction of alumina from an aluminum-bearing ore or concentrate, comprising the steps of leaching the aluminum-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of from 90° C. to the boiling point of the solution and at an Eh of at least 200 mV. After a liquid/solids separation step, the solution obtained is subjected to steps for removal of iron and for recovery of alumina. | 10-09-2014 |
| 20150010447 | Method of purification for recycling of gallium-69 isotope - A method of purification for recycling of gallium-69 isotopes includes processes of proton irradiation and dissolution for a silver alloy plating target with gallium-69. After the proton irradiation and dissolution, a high concentration elution liquid of gallium-69 and germanium-68 is obtained by washing through an ion-exchange resin to filter out gallium-69 solution, followed by neutralizing precipitation, drying, and sintering treatments to obtain a gallium oxide. The gallium oxide can be dissolved to produce a solid target, and the washing processes can be repeated. The solid target after use can be placed in recycling again. This method is not only implemented to reduce the cost of production and comply with recycling notion nowadays, but also enhance efficiency in the practical application of radioisotopes. | 01-08-2015 |
| 423113000 | Magnetic separating | 1 |
| 20130115149 | METHOD FOR PREPARING METALLURGICAL-GRADE ALUMINA BY USING FLUIDIZED BED FLY ASH - Provided a method for preparing metallurgical-grade alumina by using fluidized-bed fly ash, comprising: a) removing iron by wet magnetic separation after crushing the fly ash; b) reacting the fly ash after magnetic separation with hydrochloric acid to obtain a hydrochloric leachate; c) passing the hydrochloric leachate through macro-porous cationic resin to deeply remove iron to obtain a refined aluminum chloride solution; d) concentrating and crystallizing the refined aluminum chloride solution to obtain an aluminum chloride crystal; and e) calcining the aluminum chloride crystal to obtain the metallurgical-grade alumina. The method is simple, the procedure is easy to be controlled, the extraction efficiency of alumina is high, the production coast is low, and the product quality is steady. | 05-09-2013 |
| 423115000 | Forming compound containing plural metals | 9 |
| 20110293494 | PROCEDURE FOR OBTAINING CALCIUM ALUMINATE FROM WASTE OBTAINED FOLLOWING TREATMENT OF SALINE DROSS FROM THE PRODUCTION OF SECONDARY ALUMINIUM - Procedure for obtaining calcium aluminate from the dry waste generated in the treatment, for recovery of metallic Al and salts, of the saline dross produced in the metallurgy of secondary aluminium and calcium oxide and/or CaO precursor. The procedure may produce briquettes or pellets of precursors of calcium aluminate through cold sintering or premolten calcium aluminate through hot sintering. | 12-01-2011 |
| 20120020853 | METHOD OF MANUFACTURING ALUMINA BY RECYCLING NICKEL-ALUMINUM - A method of manufacturing alumina by recycling nickel-aluminum comprises a step of “soaking,” by soaking a purified mineral of nickel-aluminum into an alkaline buffer followed by keeping at an environment of 1 ATM to obtain a rough solution of aluminate; a step of “filtration,” by filtering out a purified mineral of nickel and cobalt from the rough solution of aluminate to obtain a solution of aluminate; a step of “purification,” by adding a de-impurity reagent into the solution of aluminate to remove the impurity of vanadates, molybdates and silicates from the solution of aluminate, in order to obtain a purified solution of aluminate; a step of “sedimentation,” by precipitating out aluminum hydroxide from the purified solution of aluminate; and a step of “calcination,” by calcining the aluminum hydroxide, finally to obtain alumina. | 01-26-2012 |
| 20140301920 | PROCESSES FOR RECOVERING RARE EARTH ELEMENTS FROM VARIOUS ORES - There are provided methods for preparing hematite. For example, the method can comprise reacting a basic aqueous composition comprising the iron and the aluminum with hematite under conditions suitable for at least partially converting the iron into hematite under the form of a precipitate, thereby obtaining a liquid phase and a solid phase; and separating the liquid phase from the solid phase. | 10-09-2014 |
| 423118100 | Aluminosilicate other than zeolite | 2 |
| 20100189613 | Process for Removal of Aluminum Oxides from Aqueous Media - The present invention relates to the use of lithium salts and/or magnesium salts for the precipitation of aluminum oxides present in aqueous media. | 07-29-2010 |
| 20140301921 | AMINE-ALDEHYDE RESINS AND USES THEREOF IN SEPARATION PROCESSES - Amine-aldehyde resins are disclosed for removing a wide variety of solids and/or ionic species from the liquids in which they are suspended and/or dissolved. These resins are especially useful as froth flotation depressants, for example in the beneficiation of value materials (e.g., bitumen, coal, or kaolin clay) to remove impurities such as sand. The resins are also useful for treating aqueous liquid suspensions to remove solid particulates, as well as for removing metallic ions in the purification of water. | 10-09-2014 |
| 423119000 | Alkali metal aluminate | 4 |
| 20110311419 | Process for Removal of Aluminum Oxides from Aqueous Media - The present invention relates to the use of lithium salts and/or magnesium salts for the precipitation of aluminum oxides present in aqueous media. | 12-22-2011 |
| 20160186292 | PROCESS FOR COLD HYDROCHEMICAL DECOMPOSITION OF SODIUM HYDROGEN ALUMINOSILICATE - A process for cold hydrochemical decomposition of sodium hydrogen aluminosilicate. The process includes decomposing sodium hydrogen aluminosilicate at low temperature with a chelate to form a solution of soluble compounds and insoluble contaminants; separating the insoluble contaminants from the solution with a coagulator and heating to coagulate the silicic acid and form a silicic acid gel; separating the silicic acid gel to form a silicic acid-free solution; decomposing the silicic acid-free solution to form a precipitate of sodium hydrogen carboaluminate and a mother liquor; separating the precipitate from the mother liquor; concentrating, cooling and regenerating the mother liquor and forming sodium hydrogen carbonate; separating the sodium hydrogen carbonate from the regenerated solution; and calcining the sodium hydrogen carboaluminate at a temperature of about | 06-30-2016 |
| 423121000 | From bauxite | 2 |
| 20130058847 | METHODS TO IMPROVE FILTRATION FOR THE BAYER PROCESS - The invention provides methods and compositions for improving the production of alumina trihydrate. The invention involves adding one or more cross-linked polysaccharides to a filter used to separate solids from liquid in the Bayer process. The one or more polysaccharides can be a cross-linked polysaccharide (such as cross-linked dextran or cross-linked dihydroxypropyl cellulose). The cross-linked polysaccharides can impart a number of advantages including greater flow rate and lower residual moisture in the resulting cake. | 03-07-2013 |
| 20160186289 | PROCESS FOR COMPLEX PROCESSING OF BAUXITE - Method for processing bauxite, including grinding the bauxite and extracting iron; separating the resulting pulp into a solid phase and a liquid phase; extracting aluminium from the liquid phase at a pH of about 7 to 8 to form a precipitate of sodium hydrogen carboaluminate; separating the precipitate of sodium hydrogen carboaluminate from the neutralized pulp; extracting iron from the neutralized liquid phase at a pH of at least about 12 using to form a precipitate of iron hydroxide; separating the precipitate of iron hydroxide from the basic pulp to form an iron ore concentrate and a mother liquor chelate; concentrating the mother liquor chelate using evaporation; cooling the concentrated solution; carbonizing the cooled solution with gaseous carbon dioxide under pressure to crystallize sodium hydrogen carbonate; and separating the crystallized sodium hydrogen carbonate from the carbonized solution to form a chelate liquid phase and a sodium hydrogen carbonate solid phase. | 06-30-2016 |
| 423122000 | Forming insoluble substance in liquid | 28 |
| 20100098607 | USE OF SILICON-CONTAINING POLYMERS FOR IMPROVED FLOCCULATION OF SOLIDS IN PROCESSES FOR THE PRODUCTION OF ALUMINA FROM BAUXITE - The suspended solids content of a process stream in a process for digesting bauxite ore to produce alumina is reduced by contacting the stream with silicon-containing polymers. | 04-22-2010 |
| 20100172811 | Process for Removal of Aluminum Oxides from Aqueous Media - The present invention relates to the use of lithium salts and/or magnesium salts for the precipitation of aluminum oxides present in aqueous media. | 07-08-2010 |
| 20100254866 | NOVEL APPROACH IN CONTROLLING DSP SCALE IN BAYER PROCESS - The invention provides a method of controlling silica in the liquor circuit of the Bayer process. The method involves addition of a promoter material to enhance the precipitation of DSP and includes adding one or more silica dispersion materials or dry silica forms to those parts of the circuit where precipitation of DSP and removal of silica from solution is desirable; for example the desilication stage of a Bayer process plant. The removal of DSP from solution reduces silica concentration in the liquor and thereby enables better control of process issues such as silica contamination in alumina product and DSP formation in later stages of the process where precipitation as scale onto vessel walls and equipment is problematical. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process. | 10-07-2010 |
| 20110200503 | COMPOSITION AND METHOD FOR IMPROVED ALUMINUM HYDROXIDE PRODUCTION - An improved method and composition for producing aluminum hydroxide crystals from precipitation liquor, involves the addition of an emulsified crystal growth modifier comprising a C | 08-18-2011 |
| 20120034142 | RECOVERY OF ALUMINA TRIHYDRATE DURING THE BAYER PROCESS USING CROSS-LINKED POLYSACCHARIDES - The invention provides methods and compositions for improving the production of alumina hydrate. The invention involves adding one or more polysaccharides to liquor or slurry in the fluid circuit of the production process. The one or more polysaccharides can be a cross-linked polysaccharide (such as cross-linked dextran or cross-linked dihydroxypropyl cellulose). The various polysaccharides can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process. | 02-09-2012 |
| 20120034143 | RECOVERY OF ALUMINA TRIHYDRATE DURING THE BAYER PROCESS USING SCLEROGLUCAN - The invention provides methods and compositions for improving the production of alumina. The invention involves adding a product containing one or more polysaccharides to liquor within the fluid circuit of the production process, where one of the polysaccharides is scieroglucan. The use of scleroglucan can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process. | 02-09-2012 |
| 20130052103 | PROCESSES FOR EXTRACTING ALUMINUM FROM ALUMINOUS ORES - There are provided processes for extracting aluminum ions from aluminous ores and for preparing alumina. Such processes can be used with various types of aluminous ores such as aluminous ores comprising, for example, various types of metals such as Fe, K, Mg, Na, Ca, Mn, Ba, Zn, Li, Sr, V, Ni, Cr, Pb, Cu, Co, Sb, As, B, Sn, Be, Mo, or mixtures thereof. | 02-28-2013 |
| 20130195739 | CROSS-LINKED ETHYLSULFONATED DIHYDROXYPROPYL CELLULOSE - The invention provides methods and compositions for improving the production of alumina hydrate. The invention involves adding one or more cross-linked ethylsulfonated polysaccharides to liquor or slurry in the fluid circuit of the production process. The one or more polysaccharides include cross-linked dextran or cross-linked dihydroxypropyl cellulose. The various polysaccharides can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process. | 08-01-2013 |
| 20140010742 | METHOD OF INCREASING THE STABILITY OF A BAYER PROCESS LIQUOR - Methods, and related products and compositions, of increasing the stability of a Bayer process liquor are described. A method of increasing the stability of a Bayer process liquor includes contacting the Bayer process liquor with a ppm quantity of a low molecular weight dextran. Also described are methods, and related products and compositions, for controlling the precipitation of aluminium-containing compounds from a Bayer process liquor. | 01-09-2014 |
| 20140065038 | PROCESSES FOR EXTRACTING ALUMINUM FROM ALUMINOUS ORES - There are provided processes for extracting aluminum ions from aluminous ores and for preparing alumina. Such processes can be used with various types of aluminous ores such as aluminous ores comprising, for example, various types of metals such as Fe, K, Mg, Na, Ca, Mn, Ba, Zn, Li, Sr, V, Ni, Cr, Pb, Cu, Co, Sb, As, B, Sn, Be, Mo, or mixtures thereof. | 03-06-2014 |
| 20140286840 | METHOD FOR RECOVERING METALS FROM WASTE ALUMINUM CATALYST - The present invention refers to a method being easy to recover metals including nickel and aluminum from waste aluminum catalysts, thereby entirely promoting the recovering rate. Said method comprises: preparing and roasting a waste aluminum catalyst with sodium salts, and then obtaining a first solution comprising vanadium and molybdenum, and a dreg comprising nickel and aluminum through leaching and filtrating; collecting and mixing the dreg with alkali powders to obtain a mixture of the dreg and alkali powders, roasting the mixture at 300 to 1000° C. with aluminum in the dreg reacting with hydroxyl generated from the roasting of mixture and further generating aluminum hydroxide, and then obtaining a second solution comprising aluminum and a concentrate having nickel through another leaching and filtrating; and recovering aluminum from the second solution and recovering nickel from the concentrate. | 09-25-2014 |
| 20160060113 | Production of Phosphate Compounds from Materials Containing Phosphorus and at Least One of Iron and Aluminium - A method for concentration of phosphate compounds comprises dissolving ( | 03-03-2016 |
| 423124000 | Agitating during reaction | 2 |
| 20090246104 | Precipitation of Gibbsite from a Bayer Liquor - A Bayer liquor is produced by dissolving bauxite in hot caustic soda. The liquor is cooled so that it is supersaturated, and seed crystals of gibbsite are added to the liquor ( | 10-01-2009 |
| 20140271416 | NEOPOLYOLS SUITABLE FOR CRYSTAL GROWTH MODIFICATION IN THE BAYER PROCESS - The invention provides methods and compositions for the addition of a CGM to precipitation liquor of a Bayer process. The CGM comprises a neopolyol, an ester derived from a neopolyol, and/or an ether derived from a neopolyol. Optionally the CGM may comprise water and/or an antifoaming agent and/or a hydrocarbon carrier liquid. The CGM is quite effective and results in a significant increase in mean particle size of produced alumina crystals. | 09-18-2014 |
| 423126000 | Halogenating | 1 |
| 20120237418 | PROCESSES FOR EXTRACTING ALUMINUM FROM ALUMINOUS ORES - There are provided processes for extracting aluminum ions from aluminous ores and for preparing alumina. Such processes can be used with various types of aluminous ores such as aluminous ores comprising various types of metals such as Fe, K, Mg, Na, Ca, Mn, Ba, Zn, Li, Sr, V, Ni, Cr, Pb, Cu, Co, Sb, As, B, Sn, Be, Mo, or mixtures thereof. | 09-20-2012 |
| 423127000 | Hydroxylating or hydrating | 13 |
| 20090285733 | COMPOSITE ARTICLE AND RELATED METHOD - A method for making a composite includes combining a strengthening agent and an aluminum compound to form a first solution; precipitating an Al(OH) | 11-19-2009 |
| 20110002824 | COMPOSITION AND METHOD FOR ENHANCING THE PRODUCTION OF CRYSTAL AGGLOMERATES FROM A PRECIPITATION LIQUOR - The present invention relates ways to increase the output of a high quality product from the precipitation liquor crystallization process exemplified through the aluminum hydroxide recovery processes such as the Bayer process. The invention is a method of increasing the size of precipitated of a liquor. The invention in one embodiment relates to the use of a crystal growth modifier compositions added to the precipitation process to increase the particle size distribution of the precipitated alumina trihydrate. | 01-06-2011 |
| 20110070133 | SELECTIVE-CATION-REMOVAL PURIFICATION OF ALUMINUM SOURCE - A method of purifying an aluminum source includes dissolving an aluminum ion source to provide a first solution including aluminum ions having a pH of not greater than 4.0, adjusting the pH of the first solution with a tetraalkylammonium hydroxide solution to a pH in range of 4.1 to 8.4 thereby forming an aluminum hydroxide precipitate, separating the aluminum hydroxide precipitate from the first solution, washing the separated aluminum hydroxide precipitate with an aqueous solution having a pH in a range of 4.1 to 8.4, dissolving the washed aluminum hydroxide precipitate using an acid to provide a second solution having a pH of not greater than 4.0, and forming an aluminum salt from the second solution. | 03-24-2011 |
| 20110158868 | IMPROVEMENT TO THE BAYER PROCESS FOR PRODUCING ALUMINA TRIHYDRATE, SAID PROCESS COMPRISING A STEP IN WHICH THE SUPERSATURATED LIQUOR IS FILTERED AT HIGH TEMPERATURE BEFORE DECOMPOSITION - Process for manufacturing alumina trihydrate by alkaline attack of bauxite, following the general steps of the Bayer process, and during which, after settling and before decomposition, the aluminate liquor undergoes a filtration, known as security filtration, so that at the end of the filtration it contains less than 10 mg/l of insoluble particles, characterized in that, during said security filtration, a filtration device is used that comprises a zone in which the liquor is subjected, after passing through said filtration media, to a pressure greater than 2 bar, preferably greater than 3 bar. Preferably, this device also comprises a zone in which the liquor is subjected, before passing through the filtration media, to a pressure greater than 5 bar, preferably greater than 6, typically in the vicinity of 7 bar. In this way, the aluminate liquor can be kept at a high temperature during the security filtration, typically greater than 130° C., preferably greater than 140° C., and be brought to a high degree of supersaturation Rp, typically greater than 1.25, without risk of reversion. | 06-30-2011 |
| 20110212006 | REDUCING ALUMINOSILICATE SCALE IN THE BAYER PROCESS - The invention provides a method of inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process. | 09-01-2011 |
| 20120003130 | ALUMINA PRODUCTION PROCESS - An improved process for producing alumina from bauxite is disclosed comprising the steps of:
| 01-05-2012 |
| 20120148462 | REDUCING ALUMINOSILICATE SCALE IN THE BAYER PROCESS - The invention provides a method of inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process. | 06-14-2012 |
| 20130343970 | REDUCING ALUMINOSILICATE SCALE IN THE BAYER PROCESS - The invention provides methods and compositions for inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process. | 12-26-2013 |
| 20130343971 | METHOD FOR CO-PRODUCING ALUMINA AND ACTIVATED CALCIUM SILICATE FROM HIGH-ALUMINA FLY ASH - A method for co-producing alumina and activated calcium silicate from high-alumina fly ash, comprising the steps that: high-alumina fly ash reacts with sodium hydroxide solution to obtain desiliconized solution and desiliconized fly ash; lime cream is added to the desiliconized solution to obtain activated calcium silicate; limestone and sodium carbonate solution are added to the desiliconized fly ash to blend raw slurry, the raw slurry is baked into clinker, and sodium aluminate crude solution is obtained from dissolution of the clinker; the sodium aluminate crude solution is subjected to the processes of first-stage deep desiliconization, second-stage deep desiliconization, carbonization decomposition, seed precipitation and etc to obtain alumina. According to the invention, less material flow and small amount of slag formation are achieved, the energy consumption, material consumption and production cost are low; the extraction rate of alumina is high, and meanwhile, activated calcium silicate with high added value is co-produced. | 12-26-2013 |
| 20140186240 | PROCESS FOR NEUTRALIZING BAUXITE DISSOLUTION RESIDUAL SUBSTANCE AND PROCESS FOR PRODUCING ALUMINUM HYDROXIDE - A process for neutralization is provided which can maintain a high solid content of a bauxite dissolution residual substance slurry even after a neutralization treatment is completed and the stabilize pH within a short time of the neutralization treatment. Such a process for neutralizing a bauxite dissolution residual substance containing a desiliconizing product which is generated in the production process of aluminum hydroxide using Bayer process, includes: mixing a bauxite dissolution residual substance or a bauxite dissolution residual substance slurry with sulfuric acid in an amount ranging from 0.6 to 1.2 equivalence to the total amount of sodium contained in the bauxite dissolution residual substance or a bauxite dissolution residual substance slurry, such that the solid content after mixing becomes 400 to 700 g/l to gelate the mixture, and thereafter obtaining a bauxite dissolution residual substance neutralized slurry. | 07-03-2014 |
| 20140271417 | CRYSTALLIZATION AIDS FOR BAYER ALUMINUM HYDROXIDE - Disclosed herein are compounds, compositions, and methods for producing aluminum hydroxide crystals from a precipitation liquor. The precipitation liquor may be located in a Bayer process. | 09-18-2014 |
| 20140286841 | PROCESSES FOR RECOVERING RARE EARTH ELEMENTS FOR ALUMINUM-BEARING MATERIALS - There are provided methods for separating iron ions from aluminum ions contained in an acidic composition. The methods comprise reacting the acidic composition with a basic aqueous composition having a pH of at least 10.5 so as to obtain a precipitation composition, maintaining the precipitation composition at a pH above 10.5 so as to cause precipitation of the iron ions, at least substantially preventing precipitation of the aluminum ions, and to obtain a mixture comprising a liquid portion and a solid portion; and separating the liquid portion from the solid portion. There are also provided methods for treating an acidic composition comprising iron ions and aluminum ions. Such methods can be useful for preparing products such as alumina, aluminum, hematite etc. | 09-25-2014 |
| 20140356262 | METHOD FOR TREATING TAILINGS POND LIQUOR - A treatment process for processing raw liquor obtained from a tailings pond containing residue from an alumina production facility is disclosed where the raw liquor is first contacted with a gas containing carbon dioxide (CO | 12-04-2014 |
| 423130000 | Destroying or separating organic impurity | 2 |
| 20090087360 | Removal of sodium oxalate from a bayer liquor - The Bayer process uses hot sodium hydroxide solution to obtain pure alumina from bauxite ore. Alumina dissolves, and is then precipitated, and the remaining caustic Bayer liquor can be recycled for use again. However sodium oxalate tends to build up in the recycled liquor, and causes problems. By removing a stream of the liquor, treating it so as to be supersaturated with sodium oxalate, and then subjecting it to ultrasonic irradiation, crystal nuclei are formed. The resultant crystals can then be separated from the liquor. Surprisingly, other organic compounds in solution do not prevent this crystallisation process from being effective. | 04-02-2009 |
| 20090169447 | METHODS AND COMPOSITIONS FOR THE REMOVAL OF IMPURITIES AND WATER FROM THE BAYER PROCESS - A liquid phase that comprises an oxalate-extracting amount of an organic salt is useful as an extractant in a liquid/liquid extraction process for purifying Bayer process streams. | 07-02-2009 |
| 423131000 | Leaching, washing, or dissolving | 8 |
| 20100119426 | PROCESS FOR RECOVERY OF SILICA FOLLOWED BY ALUMINA FROM COAL FLY ASH - A process for recovery of silica and alumina from fly ash, in which, Si is leached out from the fly ash in the form of Na | 05-13-2010 |
| 20120328497 | PRODUCTION AND/OR RECOVERY OF PRODUCTS FROM WASTE SLUDGE - A method of producing calcium carbonate from a waste sludge containing calcium carbonate and at least one silicate mineral. The method comprises the steps of:
| 12-27-2012 |
| 20150344988 | PROCESS FOR REDUCING OF LEACHABLE FLUORIDES AND CONTROLLING PH OF ALUMINUM WASTE PRODUCTS - The present disclosure provides processes for recycling spent pot lining carbon by-products (SPLCB) obtained from a caustic leach process. The process provides treating spent pot lining (SPL) or SPLCB with Ca/P-containing stabilizing agents. | 12-03-2015 |
| 423132000 | With acid | 5 |
| 20080286182 | Combined Leaching Process - THE COMBINED LEACHING PROCESS comprises a dissolution process of the soluble constituents of an ore by means of the combined execution of two or more serial leaching phases with the first phase comprising atmospheric leaching (AL) and the second one pressure leaching (HPAL). This combined process takes place when the intermediate size fraction (0.075-0.5 mm) is submitted to atmospheric leaching (AL), ensuing an effluent with a high concentration of dissolved iron and aluminum as well as high residual acidity. This said effluent is fed in the following acid pressure leaching (HPAL) phase of the fine size fraction (<0.075 mm) and at reusing free acidity, regenerating the sulfuric acid through iron and aluminum precipitation in a hydrolysis reaction, and bringing forth a considerable reduction in the addition of sulfuric acid. | 11-20-2008 |
| 20090022640 | PROCESSES FOR TREATING ALUMINIUM DROSS RESIDUES - There is provided a process for preparing aluminium chloride comprising leaching aluminium dross residues with H | 01-22-2009 |
| 20110076209 | REDUCING ALUMINOSILICATE SCALE IN THE BAYER PROCESS - The invention provides a method of inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process. | 03-31-2011 |
| 20140314640 | Method for extraction of beryllium from the minerals of genthelvite group when processing the raw minerals (ores, concentrates) - The invention relates to non-ferrous metallurgy and is used for extracting beryllium from genthelvites when processing the raw minerals (ores, concentrates) by heap and vat leaching. The objective of the invention is to disclose a method of leaching beryllium from danalite (Fe | 10-23-2014 |
| 20160177417 | Method for extraction of beryllium from the minerals of genthelvite group when processing the raw Method for extraction of beryllium from minerals of bertrandite and phenakite groups when processing the raw minerals (ores, concentrates) | 06-23-2016 |
