FR2020340A1 - Recovery of alumina from bauxites - Google Patents

Recovery of alumina from bauxites

Info

Publication number
FR2020340A1
FR2020340A1 FR6934721A FR6934721A FR2020340A1 FR 2020340 A1 FR2020340 A1 FR 2020340A1 FR 6934721 A FR6934721 A FR 6934721A FR 6934721 A FR6934721 A FR 6934721A FR 2020340 A1 FR2020340 A1 FR 2020340A1
Authority
FR
France
Prior art keywords
sodium
bauxites
alumina
recovery
cancrinite
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.)
Withdrawn
Application number
FR6934721A
Other languages
French (fr)
Inventor
Julius Berger Morris
Gordon Breuer Richard
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.)
Kaiser Aluminum and Chemical Corp
Original Assignee
Kaiser Aluminum and Chemical Corp
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 Kaiser Aluminum and Chemical Corp filed Critical Kaiser Aluminum and Chemical Corp
Publication of FR2020340A1 publication Critical patent/FR2020340A1/en
Withdrawn legal-status Critical Current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
    • 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

Landscapes

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

Abstract

Sodium aluminate solutions are desilicated by adding to them a finely divided synthetic cancrinite which makes it possible for the silicon to be precipitated from the solution as a silicate complex of sodium and aluminium. The sodium aluminate may be a digestion liquor of the Bayer process. The finely divided synthetic cancrinite may include in its crystalline structure sodium sulphate, nitrate, oxalate, phosphate or carbonate.
FR6934721A 1968-10-10 1969-10-10 Recovery of alumina from bauxites Withdrawn FR2020340A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76706168A 1968-10-10 1968-10-10

Publications (1)

Publication Number Publication Date
FR2020340A1 true FR2020340A1 (en) 1970-07-10

Family

ID=25078365

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6934721A Withdrawn FR2020340A1 (en) 1968-10-10 1969-10-10 Recovery of alumina from bauxites

Country Status (1)

Country Link
FR (1) FR2020340A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992003381A1 (en) * 1990-08-17 1992-03-05 Alcan International Limited Desilication of bayer process solutions
WO1999067172A1 (en) * 1998-06-19 1999-12-29 Alcan International Limited Process for the removal of silica from an alkaline solution containing sodium aluminate
WO2010071393A1 (en) * 2008-12-17 2010-06-24 Instituto Mexicano Del Petróleo Non-destructive process for eliminating silicon from alumina-based materials
US12006225B2 (en) 2018-02-23 2024-06-11 Rio Tinto Alcan International Limited Bayer process

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992003381A1 (en) * 1990-08-17 1992-03-05 Alcan International Limited Desilication of bayer process solutions
WO1999067172A1 (en) * 1998-06-19 1999-12-29 Alcan International Limited Process for the removal of silica from an alkaline solution containing sodium aluminate
US6086834A (en) * 1998-06-19 2000-07-11 Alcan International Limited Process for the removal of silica from an alkaline solution containing sodium aluminate
AU750520B2 (en) * 1998-06-19 2002-07-18 Alcan International Limited Process for the removal of silica from an alkaline solution containing sodium aluminate
WO2010071393A1 (en) * 2008-12-17 2010-06-24 Instituto Mexicano Del Petróleo Non-destructive process for eliminating silicon from alumina-based materials
US8716159B2 (en) 2008-12-17 2014-05-06 Instituto Mexicano Del Petroleo Non-destructive process for the elimination of silicon from alumina based materials
US12006225B2 (en) 2018-02-23 2024-06-11 Rio Tinto Alcan International Limited Bayer process

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Legal Events

Date Code Title Description
RE Withdrawal of published application