WO2009085514A3 - Reducing autoprecipitation in bayer liquor - Google Patents

Reducing autoprecipitation in bayer liquor Download PDF

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Publication number
WO2009085514A3
WO2009085514A3 PCT/US2008/084817 US2008084817W WO2009085514A3 WO 2009085514 A3 WO2009085514 A3 WO 2009085514A3 US 2008084817 W US2008084817 W US 2008084817W WO 2009085514 A3 WO2009085514 A3 WO 2009085514A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
autoprecipitation
process liquor
gum
reducing
bayer liquor
Prior art date
Application number
PCT/US2008/084817
Other languages
French (fr)
Other versions
WO2009085514A2 (en )
Inventor
Qi Dai
Terence Foster
Original Assignee
Cytec Technology Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00Compounds of aluminium
    • C01F7/02Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/06Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
    • C01F7/062Digestion
    • C01F7/0633Digestion characterised by the use of additives
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00Compounds of aluminium
    • C01F7/02Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/06Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
    • C01F7/0606Make-up of the alkali hydroxide solution from recycled spent liquor
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00Compounds of aluminium
    • C01F7/02Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/06Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
    • C01F7/0646Separation of the insoluble residue, e.g. red mud
    • C01F7/0653Separation of the insoluble residue, e.g. red mud characterised by the flocculant added to the slurry

Abstract

A method to inhibit autoprecipitation of aluminum containing compounds in a Bayer process liquor includes adding an effective amount of a polysaccharide to the Bayer process liquor. Polysaccharides which are added in accordance with the present method selected from gum arahic, tamarind gum, gum ghatti and mixtures thereof. Effective addition sites for the autoprecipitation inhibitor are prior to filtering clarified process liquor and subsequent to condensation of caustic soda from spent process liquor.
PCT/US2008/084817 2007-12-28 2008-11-26 Reducing autoprecipitation in bayer liquor WO2009085514A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US1730407 true 2007-12-28 2007-12-28
US61/017,304 2007-12-28

Publications (2)

Publication Number Publication Date
WO2009085514A2 true WO2009085514A2 (en) 2009-07-09
WO2009085514A3 true true WO2009085514A3 (en) 2010-01-14

Family

ID=40344993

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/084817 WO2009085514A3 (en) 2007-12-28 2008-11-26 Reducing autoprecipitation in bayer liquor

Country Status (1)

Country Link
WO (1) WO2009085514A3 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9174852B2 (en) 2010-08-09 2015-11-03 Nalco Company Methods to improve filtration for the Bayer process
US8298508B2 (en) * 2010-08-09 2012-10-30 Nalco Company Recovery of alumina trihydrate during the bayer process using cross-linked polysaccharides
US9199855B2 (en) 2010-08-09 2015-12-01 Nalco Company Chemical treatment to improve red mud separation and washing in the bayer process
CN104768627B (en) * 2012-10-29 2017-03-22 纳尔科公司 A method for improving the Bayer process filtration
US8252266B2 (en) * 2010-08-09 2012-08-28 Nalco Company Recovery of alumina trihydrate during the bayer process using scleroglucan
US9102995B2 (en) 2010-08-09 2015-08-11 Nalco Company Cross-linked ethylsulfonated dihydroxypropyl cellulose
US9187337B2 (en) 2010-09-06 2015-11-17 Alcoa Of Australia Limited Method of increasing the stability of a Bayer process liquor
WO2012037454A3 (en) * 2010-09-16 2012-06-07 Rinker Franklin G Coal processing with added biomass and volatile control
US9260767B2 (en) 2011-03-18 2016-02-16 Orbite Technologies Inc. Processes for recovering rare earth elements from aluminum-bearing materials
WO2012162817A1 (en) 2011-06-03 2012-12-06 Orbite Aluminae Inc. Methods for preparing hematite
RU2014114938A (en) 2011-09-16 2015-10-27 Орбит Элюминэ Инк. Methods for making alumina and a variety of other products
RU2597096C2 (en) 2012-07-12 2016-09-10 Орбит Алюминэ Инк. Methods of producing titanium oxide and other products
US9023301B2 (en) 2012-01-10 2015-05-05 Orbite Aluminae Inc. Processes for treating red mud
WO2014047728A1 (en) 2012-09-26 2014-04-03 Orbite Aluminae Inc. Processes for preparing alumina and magnesium chloride by hc1 leaching of various materials
WO2014075173A1 (en) 2012-11-14 2014-05-22 Orbite Aluminae Inc. Methods for purifying aluminium ions

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734796A (en) * 1956-02-14 Composition comprising stable solid sodium aluminate
FR1356638A (en) * 1963-05-09 1964-03-27 Reynolds Metals Co Improvements to stabilized alkali metal aluminates and methods for their preparation
US4839060A (en) * 1987-04-28 1989-06-13 Suncor, Inc. Methylated starch compositions and their use as flocculating agents for mineral wastes, such as bauxite residues

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734796A (en) * 1956-02-14 Composition comprising stable solid sodium aluminate
FR1356638A (en) * 1963-05-09 1964-03-27 Reynolds Metals Co Improvements to stabilized alkali metal aluminates and methods for their preparation
US4839060A (en) * 1987-04-28 1989-06-13 Suncor, Inc. Methylated starch compositions and their use as flocculating agents for mineral wastes, such as bauxite residues

Also Published As

Publication number Publication date Type
WO2009085514A2 (en) 2009-07-09 application

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