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Class Information
Number: 423/121
Name: Chemistry of inorganic compounds > Treating mixture to obtain metal containing compound > Group iiia metal or beryllium (al, ga, in, tl, or be) > Forming compound containing plural metals > Alkali metal aluminate > From bauxite
Description: Processes wherein the mixture or source material is the mineral bauxite, which is naturally occurring Al2










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8679427 Process for neutralizing bauxite dissolution residual substance and process for producing aluminum hydroxide Mar. 25, 2014
8628737 Transfer of slurry in a bayer process Jan. 14, 2014
8628738 Bayer process for producing alumina trihydrate, said process comprising a step in which the supersaturated liquor is filtered at high temperature before decomposition Jan. 14, 2014
8545776 Reducing aluminosilicate scale in the Bayer process Oct. 1, 2013
8382991 Method of sorbing discolored organic compounds from water Feb. 26, 2013
8377310 Method and composition for sorbing toxic substances Feb. 19, 2013
8298508 Recovery of alumina trihydrate during the bayer process using cross-linked polysaccharides Oct. 30, 2012
8216534 Water-in-oil-in-water emulsions of hydroxamated polymers and methods for using the same Jul. 10, 2012
7988863 Silane substituted polyalkylene oxide reagents and methods of using for preventing or reducin aluminosilicate scale in industrial processes Aug. 2, 2011
7901583 Treatment of aqueous suspensions Mar. 8, 2011
7875188 Treatment of aqueous suspensions Jan. 25, 2011
7863471 Process for the transesterification of esters Jan. 4, 2011
7863480 Process for alkaline hydrolysis of carboxylic acid derivatives to carboxylic acids Jan. 4, 2011
7820121 Destruction of organics in Bayer process streams Oct. 26, 2010
7807119 Bayer process for production of alumina trihydrate, the said improvement relating to separation of aluminate liquor and insoluble residues Oct. 5, 2010
7771681 Method for improved aluminum hydroxide production Aug. 10, 2010
7704471 Bayer process for production of alumina trihydrate by alkaline digestion of bauxite, the process comprising a predesilication step Apr. 27, 2010
7691348 Process for the removal of anionic impurities from caustic aluminate solutions Apr. 6, 2010
7666373 Alumina recovery using aluminum containing layered double hydroxide Feb. 23, 2010
7658896 Method for attacking bauxite enhancing filterability of sludge in attack output Feb. 9, 2010
7575687 Membranes and methods useful for caustic applications Aug. 18, 2009
7270704 Mixture for fabrication of fireproof high-strength spherical granules and the method of their manufacture Sep. 18, 2007
7264729 Process for reducing contaminants in condensate resulting from the conversion of bauxite to alumina Sep. 4, 2007
7247292 Aluminum hydroxide and production process thereof Jul. 24, 2007
7244404 Process for the removal of oxalate and/or sulphate from bayer liquors Jul. 17, 2007
7217408 Solubilisation of carbonates by recycling condensates during digestion of monohydrate bauxites under pressure May. 15, 2007
6878357 Method for particle size distribution control in a bayer circuit decomposition chain, comprising an agglomeration phase Apr. 12, 2005
6821440 Treatment of mineral materials Nov. 23, 2004
6814873 Method of preventing or reducing aluminosilicate scale in a bayer process Nov. 9, 2004
6740249 Filtration aid for the bayer process May. 25, 2004
6726845 Dextran starch and flocculant combination for improving red mud clarification Apr. 27, 2004
6669852 Separation method of goethite-containing red mud Dec. 30, 2003
6616902 Feed processing for improved alumina process performance Sep. 9, 2003
6599489 Aluminum trihydrate crystals and improved method for the production thereof Jul. 29, 2003
6582670 Feed processing for improved alumina process performance Jun. 24, 2003
6555077 Organic impurity removal process for bayer liquors Apr. 29, 2003
6555076 Bauxite ore digestion in the bayer process Apr. 29, 2003
6528028 Process for treating bauxite in which a desilication product and an insoluble residure are separately precipitated Mar. 4, 2003
6527959 Method of clarifying bayer process liquors using salicylic acid containing polymers Mar. 4, 2003
6479024 Process for removing impurities from bauxite Nov. 12, 2002
6391277 Bayer process for production of alumina trihydrate May. 21, 2002
6365116 Rheology modification of settled solids in mineral processing Apr. 2, 2002
6309615 Process for removing reactive silica from a bayer process feedstock Oct. 30, 2001
6299846 Process for producing aluminum hydroxide from alumina-containing ore Oct. 9, 2001
6296819 Process for the manufacture of coarse aluminium hydroxide Oct. 2, 2001
6296818 Method for processing bauxite rich in alumina monohydrate Oct. 2, 2001
6231768 Rheology modification of settled solids in mineral processing May. 15, 2001
6168767 Production of alumina Jan. 2, 2001
6110377 Process for recovering the sodium contained in industrial alkaline waste Aug. 29, 2000
6086834 Process for the removal of silica from an alkaline solution containing sodium aluminate Jul. 11, 2000

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