CA2108785A1 - Method for the control of sodium oxalate levels in sodium aluminate solutions - Google Patents

Method for the control of sodium oxalate levels in sodium aluminate solutions

Info

Publication number
CA2108785A1
CA2108785A1 CA2108785A CA2108785A CA2108785A1 CA 2108785 A1 CA2108785 A1 CA 2108785A1 CA 2108785 A CA2108785 A CA 2108785A CA 2108785 A CA2108785 A CA 2108785A CA 2108785 A1 CA2108785 A1 CA 2108785A1
Authority
CA
Canada
Prior art keywords
sodium
sodium oxalate
oxalate
concentration
spheroidal
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.)
Granted
Application number
CA2108785A
Other languages
French (fr)
Other versions
CA2108785C (en
Inventor
Jean Victor Sang
Bryan A. Hiscox
Robert Louis Clegg
Jacques Laurier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rio Tinto Alcan International Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2108785A1 publication Critical patent/CA2108785A1/en
Application granted granted Critical
Publication of CA2108785C publication Critical patent/CA2108785C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C01F7/46—Purification of aluminium oxide, aluminium hydroxide or aluminates
    • C01F7/47—Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors
    • C01F7/473—Removal of organic compounds, e.g. sodium oxalate

Landscapes

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

Abstract

A process is described for removing sodium oxalate from a sodium aluminate liquor produced through bauxite digestiol using the Bayer process. The novel sodium oxalate removal procedure comprises the steps of (a) continuously generating new and reactive seed particles of sodium oxalate by mixing together an aqueous solution of sodium oxalate and a portion of said Baye proccss sodium aluminate liquor to achieve a concentration of sodium oxalate within a range to generate spheroidal particles o sodium oxalate (b) adding a suspension of said spheroidal panicles of sodium oxalate as seed to a second portion of said Baye proccss sodium aluminate liquor, to thereby precipitate the remainder of dissolved sodium oxalate and (c) sepatining the sodiun oxalate precipitate, leaving a liquor of reduced sodium oxalate contamination. The spheroidal panicles are formed by controllin the concentration of sodium oxalate at a level about 5% to about 75% above autonucleation concentration.
CA002108785A 1991-05-03 1992-05-01 Method for the control of sodium oxalate levels in sodium aluminate solutions Expired - Lifetime CA2108785C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69525691A 1991-05-03 1991-05-03
US695,256 1991-05-03

Publications (2)

Publication Number Publication Date
CA2108785A1 true CA2108785A1 (en) 1992-11-04
CA2108785C CA2108785C (en) 1998-06-16

Family

ID=24792272

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002108785A Expired - Lifetime CA2108785C (en) 1991-05-03 1992-05-01 Method for the control of sodium oxalate levels in sodium aluminate solutions

Country Status (5)

Country Link
AU (1) AU650747B2 (en)
BR (1) BR9205965A (en)
CA (1) CA2108785C (en)
IE (1) IE68425B1 (en)
WO (1) WO1992019537A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2135538T3 (en) * 1994-01-07 1999-11-01 Alcan Int Ltd A PROCEDURE FOR CRYSTALLIZATION TO SEPARATE IMPURITIES OF LIQUORS FROM THE BAYER PROCEDURE.
FR2794449B1 (en) * 1999-06-04 2001-10-19 Pechiney Aluminium METHOD FOR PURIFYING SODIUM ALUMINATE LIQUORS CONTAINING SODIUM OXALATE FOR USE OF RESIDUES
CN112047366A (en) * 2020-08-11 2020-12-08 中国铝业股份有限公司 Method for removing sodium oxalate in alumina decomposition mother liquor by using scabs of decomposition tank
CN112939040A (en) * 2021-03-31 2021-06-11 中铝集团山西交口兴华科技股份有限公司 Method for removing sodium oxalate in production process of alumina and fine alumina
CN114408956B (en) * 2022-01-07 2023-08-22 中铝山东有限公司 Comprehensive carbon removal method and system for high-organic matter sodium aluminate solution

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317226A1 (en) * 1975-07-07 1977-02-04 Alcan Res & Dev IMPROVEMENTS IN ALUMINA PRODUCTION
JPS5456098A (en) * 1977-10-12 1979-05-04 Nippon Light Metal Co Method of producing crude aluminum hydrate particles
US4263261A (en) * 1978-12-21 1981-04-21 Sumitomo Aluminium Smelting Company, Limited Method for the removal of impurities from sodium aluminate solution
GB2211832A (en) * 1987-10-30 1989-07-12 Commw Scient Ind Res Org Bayer process liquor purification
AU613758B2 (en) * 1988-06-03 1991-08-08 Vereinigte Aluminium-Werke Aktiengesellschaft Method for removing sodium oxalate from caustic aluminate liquors

Also Published As

Publication number Publication date
BR9205965A (en) 1995-03-01
AU650747B2 (en) 1994-06-30
WO1992019537A1 (en) 1992-11-12
IE921423A1 (en) 1992-11-04
AU1664292A (en) 1992-12-21
CA2108785C (en) 1998-06-16
IE68425B1 (en) 1996-06-12

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Legal Events

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