WO2021055477A8 - Chemical compositions for improving the rheology of red mud slurry in the alumina extraction process - Google Patents

Chemical compositions for improving the rheology of red mud slurry in the alumina extraction process Download PDF

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Publication number
WO2021055477A8
WO2021055477A8 PCT/US2020/051071 US2020051071W WO2021055477A8 WO 2021055477 A8 WO2021055477 A8 WO 2021055477A8 US 2020051071 W US2020051071 W US 2020051071W WO 2021055477 A8 WO2021055477 A8 WO 2021055477A8
Authority
WO
WIPO (PCT)
Prior art keywords
red mud
viscosity
mud slurry
copolymer
reducing agent
Prior art date
Application number
PCT/US2020/051071
Other languages
French (fr)
Other versions
WO2021055477A1 (en
Inventor
Renata VINHAS
Airong Song
Original Assignee
Cytec Industries Inc.
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
Application filed by Cytec Industries Inc. filed Critical Cytec Industries Inc.
Publication of WO2021055477A1 publication Critical patent/WO2021055477A1/en
Publication of WO2021055477A8 publication Critical patent/WO2021055477A8/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
    • C08F212/02—Monomers containing only one unsaturated aliphatic radical
    • C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06—Hydrocarbons
    • C08F212/08—Styrene
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/06—Preparation 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
    • C01F7/062—Digestion
    • C01F7/0633—Digestion characterised by the use of additives
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
    • C08F222/02—Acids; Metal salts or ammonium salts thereof, e.g. maleic acid or itaconic acid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
    • C08F222/04—Anhydrides, e.g. cyclic anhydrides
    • C08F222/06—Maleic anhydride
    • C08F222/08—Maleic anhydride with vinyl aromatic monomers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L35/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L35/06—Copolymers with vinyl aromatic monomers
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Methods and compositions that can significantly reduce the viscosity of a red mud slurry in the Bayer process, by adding an effective amount of a viscosity-reducing agent. In certain aspects, a sodium allyl sulfonate maleic add copolymer (e.g., a copolymer comprising monomers of formula (I) and (II)), and/or a styrene maleic anhydride copolymer (e.g., a copolymer of formula (III)) may be used as the viscosity- reducing agent. The viscosity-reducing agent may be added during the Bayer process, e.g., after flocculation of the red mud slurry, at one or more washing tanks, and/or at the feed to a press filter. These methods and compositions allow alumina refinery plants to increase alumina production and reduce energy consumption by improving throughput of red mud processing and disposal, reducing energy consumption used to pump the red mud slurry, and reducing the operational costs of press filters.
PCT/US2020/051071 2019-09-20 2020-09-16 Chemical compositions for improving the rheology of red mud slurry in the alumina extraction process WO2021055477A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201962903182P 2019-09-20 2019-09-20
US62/903,182 2019-09-20

Publications (2)

Publication Number Publication Date
WO2021055477A1 WO2021055477A1 (en) 2021-03-25
WO2021055477A8 true WO2021055477A8 (en) 2021-11-04

Family

ID=74884690

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2020/051071 WO2021055477A1 (en) 2019-09-20 2020-09-16 Chemical compositions for improving the rheology of red mud slurry in the alumina extraction process

Country Status (1)

Country Link
WO (1) WO2021055477A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5043077A (en) * 1989-12-11 1991-08-27 Alcan International Limited Treatment of bayer process red mud slurries
JP2658771B2 (en) * 1991-12-27 1997-09-30 日本軽金属株式会社 Addition method of red mud settling aid in sedimentation separation of red mud
FR2742446B1 (en) * 1995-12-14 1999-01-15 Coatex Sa USE OF COPOLYMERS OF STYRENE AND MALEIC ANHYDRIDE AS DISPERSING AND / OR MINERAL LOAD TREATMENT AGENTS. THERMOPLASTIC COMPOSITIONS CONTAINING THEM
US6231768B1 (en) * 1999-01-19 2001-05-15 Nalco Chemical Company Rheology modification of settled solids in mineral processing
WO2005103093A2 (en) * 2004-04-19 2005-11-03 The Lubrizol Corporation Dispersant viscosity modifiers based on maleic anhydride-styrene copolymers
WO2019055960A1 (en) * 2017-09-18 2019-03-21 Cytec Industries Inc. Bauxite grinding aids and methods of use

Also Published As

Publication number Publication date
WO2021055477A1 (en) 2021-03-25

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