CA2108785C - Methode de controle de la concentration d'oxalate de sodium dans des solutions d'aluminate de sodium - Google Patents

Methode de controle de la concentration d'oxalate de sodium dans des solutions d'aluminate de sodium

Info

Publication number
CA2108785C
CA2108785C CA002108785A CA2108785A CA2108785C CA 2108785 C CA2108785 C CA 2108785C CA 002108785 A CA002108785 A CA 002108785A CA 2108785 A CA2108785 A CA 2108785A CA 2108785 C CA2108785 C CA 2108785C
Authority
CA
Canada
Prior art keywords
sodium
oxalate
sodium oxalate
liquor
concentration
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 - Lifetime
Application number
CA002108785A
Other languages
English (en)
Other versions
CA2108785A1 (fr
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
Alcan International Ltd Canada
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 Alcan International Ltd Canada filed Critical Alcan International Ltd Canada
Publication of CA2108785A1 publication Critical patent/CA2108785A1/fr
Application granted granted Critical
Publication of CA2108785C publication Critical patent/CA2108785C/fr
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

Méthode pour éliminer l'oxalate de sodium dans une liqueur d'aluminate de sodium produite par digestion de bauxite utilisant le procédé Bayer. La nouvelle méthode d'élimination de l'oxalate de sodium comprend les étapes suivantes : a) production en continu de nouveaux germes particulaires réactifs d'oxalate de sodium, par mélange d'une solution aqueuse d'oxalate de sodium et d'une fraction de la liqueur d'aluminate de sodium du procédé Bayer, de façon à obtenir une concentration d'oxalate de sodium dans une plage où il y a formation de particules sphéroïdales d'oxalate de sodium; b) addition d'une suspension de ces particules comme germes à une seconde fraction de la liqueur d'aluminate de sodium du procédé Bayer, ce qui fait précipiter le reste de l'oxalate de sodium dissous; c) séparation du précipité d'oxalate de sodium, ce qui laisse une liqueur moins contaminée par cet oxalate. Les particules sphéroïdales sont formées en maintenant la concentration d'oxalate de sodium à une concentration supérieure d'environ 5 % à 75 % à la concentration d'autonucléation.
CA002108785A 1991-05-03 1992-05-01 Methode de controle de la concentration d'oxalate de sodium dans des solutions d'aluminate de sodium Expired - Lifetime CA2108785C (fr)

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 CA2108785A1 (fr) 1992-11-04
CA2108785C true CA2108785C (fr) 1998-06-16

Family

ID=24792272

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002108785A Expired - Lifetime CA2108785C (fr) 1991-05-03 1992-05-01 Methode de controle de la concentration d'oxalate de sodium dans des solutions d'aluminate de sodium

Country Status (5)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69419712T2 (de) * 1994-01-07 2000-01-13 Alcan Int Ltd Verfahren zur Entfernung durch Kristallisation von Verunreinigungen aus Bayerprozesslaugen
FR2794449B1 (fr) * 1999-06-04 2001-10-19 Pechiney Aluminium Procede d'epuration des liqueurs d'aluminate de sodium contenant de l'oxalate de sodium permettant de valoriser les residus
CN112047366A (zh) * 2020-08-11 2020-12-08 中国铝业股份有限公司 一种以分解槽结疤脱除氧化铝分解母液中草酸钠的方法
CN112939040A (zh) * 2021-03-31 2021-06-11 中铝集团山西交口兴华科技股份有限公司 一种氧化铝及精细氧化铝生产流程中去除草酸钠的方法
CN114408956B (zh) * 2022-01-07 2023-08-22 中铝山东有限公司 一种高有机物铝酸钠溶液综合除碳方法和系统
CN116282102A (zh) * 2022-11-29 2023-06-23 山西华兴铝业有限公司 一种有机物脱除流程中添加种子的方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317226A1 (fr) * 1975-07-07 1977-02-04 Alcan Res & Dev Perfectionnements a la production d'alumine
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
AU650747B2 (en) 1994-06-30
BR9205965A (pt) 1995-03-01
WO1992019537A1 (fr) 1992-11-12
IE68425B1 (en) 1996-06-12
AU1664292A (en) 1992-12-21
CA2108785A1 (fr) 1992-11-04
IE921423A1 (en) 1992-11-04

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