GB1230332A - - Google Patents

Info

Publication number
GB1230332A
GB1230332A GB1829169A GB1230332DA GB1230332A GB 1230332 A GB1230332 A GB 1230332A GB 1829169 A GB1829169 A GB 1829169A GB 1230332D A GB1230332D A GB 1230332DA GB 1230332 A GB1230332 A GB 1230332A
Authority
GB
United Kingdom
Prior art keywords
weight
alumina
polymer
starch
acrylic acid
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB1829169A
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 filed Critical
Publication of GB1230332A publication Critical patent/GB1230332A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C01F7/0646—Separation of the insoluble residue, e.g. of red mud
    • C01F7/0653—Separation of the insoluble residue, e.g. of red mud characterised by the flocculant added to the slurry

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

1,230,332. Alumina. NALCO CHEMICAL CO. 9 April, 1969, No. 18291/69. Heading C1A. [Also in Division C3] Alumina is prepared by digesting bauxite in an aqueous solution at an elevated temperature with a strong base to solubilize the alumina and separating the alumina from the water-insoluble impurities by adding at least 0À1% by weight, based on the weight of the imuprities, of a novel composition comprising starch and a polyacrylic polymer, the weight ratio of said starch to said polymer being from 10 : 1 to 200 : 1, said polymer having a molecular weight of at least 50,000 and wherein at least 80% by weight of the polymer structure is made up of acrylic acid or acrylic acid salt groups. Suitable specified polymers include homopolymers comprising polyacrylie acid or salts thereof, and water soluble copolymers derived from copolymerizing 80-99% by weight of an alkali metal acrylate and 1-20% by weight of a monomer having an ethylenically unsaturated polymerizable compound containing a hydrophilic group in a side chain attached to the unsaturated hydrocarbon structure.
GB1829169A 1969-04-09 1969-04-09 Expired GB1230332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1829169 1969-04-09

Publications (1)

Publication Number Publication Date
GB1230332A true GB1230332A (en) 1971-04-28

Family

ID=10109947

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1829169A Expired GB1230332A (en) 1969-04-09 1969-04-09

Country Status (1)

Country Link
GB (1) GB1230332A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478795A (en) * 1982-10-18 1984-10-23 Diamond Shamrock Chemicals Company Aluminum trihydroxide deliquoring with anionic polymers
GB2164639A (en) * 1984-09-17 1986-03-26 Nalco Chemical Co Improved flocculants for bauxite (red mud)
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478795A (en) * 1982-10-18 1984-10-23 Diamond Shamrock Chemicals Company Aluminum trihydroxide deliquoring with anionic polymers
GB2164639A (en) * 1984-09-17 1986-03-26 Nalco Chemical Co Improved flocculants for bauxite (red mud)
GB2164639B (en) * 1984-09-17 1989-03-30 Nalco Chemical Co Process for flocculation of bauxite (red mud)
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

Similar Documents

Publication Publication Date Title
GB1511908A (en) High hlb latex polymers
DE3067033D1 (en) Process for preparing an alkali acrylate polymer having high salt solution-absorbency and polymer produced thereby
ES8602064A1 (en) Process for producing highly water absorptive polymer
GB729382A (en) Improvements in or relating to solutions of acrylonitrile polymers
GB1438449A (en) Preparation of aqueous polymer emulsions
GB1496286A (en) Suspension polymerization of vinyl chloride
JPS54133583A (en) Preparation of polymer
KR890010130A (en) Improved aqueous coating composition containing aluminum pigment and gas evolution inhibitor
GB1230332A (en)
GB1413083A (en) Anionic high molecular flocculants
JPS5620169A (en) Scale inhibitor
GB1287324A (en) Production of acrylonitrile polymer solutions
JPS56103207A (en) Preparation of dried high-molecular weight water-soluble polymer
US3929751A (en) High molecular weight acrylamide polymer production by high solids solution polymerization
ES342275A1 (en) Production of acrylonitrile polymers by photo - polymerization in an aqueous thiocyanate solution
GB1413162A (en) Paint vehicle emulsion copolymers and their production
GB1185775A (en) Improvements in or relating to Suspension Polymerisation
GB1466064A (en) Production of emulsion polymers
GB1466660A (en) Production of emulsion polymers
GB1357973A (en) Aqueous polymer solutions which undergo thermoreversible coa cervation
GB1360432A (en) Process for polymerizing olefinically unsaturated compounds
GB1204775A (en) Process of preparing alumina from bauxite
GB1217106A (en) Anti-caking urea compositions
GB1327267A (en) Process for preparing lactonized acrylic polymer solutions
GB1433345A (en) Vinyl chloride polymers

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee