CA2370956A1 - Method for causticisation of alkaline solutions - Google Patents

Method for causticisation of alkaline solutions Download PDF

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Publication number
CA2370956A1
CA2370956A1 CA002370956A CA2370956A CA2370956A1 CA 2370956 A1 CA2370956 A1 CA 2370956A1 CA 002370956 A CA002370956 A CA 002370956A CA 2370956 A CA2370956 A CA 2370956A CA 2370956 A1 CA2370956 A1 CA 2370956A1
Authority
CA
Canada
Prior art keywords
causticisation
alkaline solutions
alkaline solution
reaction mixture
lime
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
CA002370956A
Other languages
French (fr)
Other versions
CA2370956C (en
Inventor
Geraldine Charmaine De Witt
Gerald Ian Dunstan Roach
Glenn Reid
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.)
Alcoa of Australia 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 CA2370956A1 publication Critical patent/CA2370956A1/en
Application granted granted Critical
Publication of CA2370956C publication Critical patent/CA2370956C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • D21C11/0078—Treatment of green or white liquors with other means or other compounds than gases, e.g. in order to separate solid compounds such as sodium chloride and carbonate from these liquors; Further treatment of these compounds
    • 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
    • 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

Landscapes

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

Abstract

A method for the causticisation of an alkaline solution, the method characterised by the step of adding a quantity of lime to the alkaline solution to produce a reaction mixture in such a manner that the reaction temperature of the reaction mixture so produced rapidly exceeds the atmospheric boiling point of the alkaline solution.
CA002370956A 1999-04-23 2000-04-20 Method for causticisation of alkaline solutions Expired - Fee Related CA2370956C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPP9982A AUPP998299A0 (en) 1999-04-23 1999-04-23 Method for causticisation of alkaline solutions
AUPP9982 1999-04-23
PCT/AU2000/000346 WO2000064812A1 (en) 1999-04-23 2000-04-20 Method for causticisation of alkaline solutions

Publications (2)

Publication Number Publication Date
CA2370956A1 true CA2370956A1 (en) 2000-11-02
CA2370956C CA2370956C (en) 2008-12-30

Family

ID=3814183

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002370956A Expired - Fee Related CA2370956C (en) 1999-04-23 2000-04-20 Method for causticisation of alkaline solutions

Country Status (5)

Country Link
EP (1) EP1194376A4 (en)
AU (1) AUPP998299A0 (en)
BR (1) BR0009920B1 (en)
CA (1) CA2370956C (en)
WO (1) WO2000064812A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPQ889100A0 (en) 2000-07-20 2000-08-10 Worsley Alumina Pty Ltd Improved process for filter aid production in alumina refineries
EP2308856A1 (en) 2009-10-09 2011-04-13 Borealis Agrolinz Melamine GmbH Water recycling in a melamine production process
BR112014021588B1 (en) * 2012-03-07 2020-10-13 South32 Worsley Alumina Pty Ltd high temperature etching process for etching a bayer process liquor
AU2012203292C8 (en) * 2012-03-07 2013-12-19 South32 Worsley Alumina Pty Ltd High temperature processs for causticisation of a bayer liquor
AU2019275940A1 (en) * 2018-05-28 2020-12-10 Alcoa Of Australia Limited Method for controlling the concentration of impurities in bayer liquors
WO2019227130A1 (en) * 2018-05-28 2019-12-05 Alcoa Of Australia Limited Method for impurity control
CN111362290A (en) * 2020-05-05 2020-07-03 湖南诺兰蒂尔环保科技有限公司 Causticizing process and device for sodium carbonate in sodium aluminate solution
CN115784408B (en) * 2022-08-31 2023-09-12 哈尔滨工业大学 Method for removing phosphorus, fluorine and heavy metals in wastewater by utilizing modified seed crystal induced crystallization

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522605A (en) * 1949-05-13 1950-09-19 Kaiser Aluminium Chem Corp Process for extraction of alumina from aluminous ores
US3210155A (en) * 1962-05-15 1965-10-05 Ormet Corp Process for treating aluminum containing ores
HU187654B (en) * 1982-02-26 1986-02-28 Ajkai Timfoeldgyar Aluminium Process for reduction of damages in production of aluminium oxid of bayer system
US4451443A (en) * 1982-07-28 1984-05-29 Aluminum Company Of America Causticization method
US5145556A (en) * 1991-07-31 1992-09-08 International Paper Company Single-stage slaking and causticizing method

Also Published As

Publication number Publication date
BR0009920B1 (en) 2011-05-17
BR0009920A (en) 2002-05-28
WO2000064812A1 (en) 2000-11-02
EP1194376A1 (en) 2002-04-10
AUPP998299A0 (en) 1999-05-20
EP1194376A4 (en) 2004-04-07
CA2370956C (en) 2008-12-30

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