EP0777628A4 - Verbessertes verfahren zur extraktion von aluminiumoxid aus bauxit - Google Patents

Verbessertes verfahren zur extraktion von aluminiumoxid aus bauxit

Info

Publication number
EP0777628A4
EP0777628A4 EP95928901A EP95928901A EP0777628A4 EP 0777628 A4 EP0777628 A4 EP 0777628A4 EP 95928901 A EP95928901 A EP 95928901A EP 95928901 A EP95928901 A EP 95928901A EP 0777628 A4 EP0777628 A4 EP 0777628A4
Authority
EP
European Patent Office
Prior art keywords
bauxite
alumina
extraction
improved process
improved
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Withdrawn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
EP95928901A
Other languages
English (en)
French (fr)
Other versions
EP0777628A1 (de
Inventor
Darren Paul Rodda
Raymond Walter Shaw
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 Aluminium Ltd
Original Assignee
Comalco Aluminum Ltd
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 Comalco Aluminum Ltd filed Critical Comalco Aluminum Ltd
Publication of EP0777628A1 publication Critical patent/EP0777628A1/de
Publication of EP0777628A4 publication Critical patent/EP0777628A4/de
Withdrawn legal-status Critical Current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
    • C01F7/04—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
    • 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
EP95928901A 1994-08-23 1995-08-23 Verbessertes verfahren zur extraktion von aluminiumoxid aus bauxit Withdrawn EP0777628A4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPM7611A AUPM761194A0 (en) 1994-08-23 1994-08-23 Improved process for the extraction of alumina from bauxite
AUPM7611/94 1994-08-23
PCT/AU1995/000526 WO1996006043A1 (en) 1994-08-23 1995-08-23 Improved process for the extraction of alumina from bauxite

Publications (2)

Publication Number Publication Date
EP0777628A1 EP0777628A1 (de) 1997-06-11
EP0777628A4 true EP0777628A4 (de) 1999-06-09

Family

ID=3782132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95928901A Withdrawn EP0777628A4 (de) 1994-08-23 1995-08-23 Verbessertes verfahren zur extraktion von aluminiumoxid aus bauxit

Country Status (5)

Country Link
EP (1) EP0777628A4 (de)
AU (1) AUPM761194A0 (de)
BR (1) BR9508761A (de)
CA (1) CA2197457A1 (de)
WO (1) WO1996006043A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPO376296A0 (en) * 1996-11-20 1996-12-12 Comalco Aluminium Limited Removal of silica from bauxite
US6528028B2 (en) * 1999-12-28 2003-03-04 Showa Denko K.K. Process for treating bauxite in which a desilication product and an insoluble residure are separately precipitated
FR2860782B1 (fr) * 2003-10-10 2006-09-29 Pechiney Aluminium Procede pour reduire l'encrassement des echangeurs thermiques d'un circuit bayer
US8029752B2 (en) 2009-04-06 2011-10-04 Nalco Company Approach in controlling DSP scale in bayer process
US9487408B2 (en) 2009-09-25 2016-11-08 Nalco Company Reducing aluminosilicate scale in the bayer process
US9416020B2 (en) 2009-09-25 2016-08-16 Nalco Company Surfactant based small molecules for reducing aluminosilicate scale in the bayer process
CN106542553B (zh) * 2015-09-21 2018-05-22 沈阳铝镁设计研究院有限公司 一种氧化铝生产中三水铝石矿的溶出工艺方法
CN110563011A (zh) * 2019-09-12 2019-12-13 西南能矿集团股份有限公司 一种氧化铝制备用的脱硅剂及其制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4518571A (en) * 1984-02-27 1985-05-21 Vsesojuzny Nauchno-Issledovatelsky I Proektny Institut Aljuminievo Magnievoi I Elektrodnoi Promyshlennosti Process for desilication of aluminate liquors in the production of alumina
WO1994002416A1 (en) * 1992-07-24 1994-02-03 Comalco Aluminium Limited Process for extracting alumina from bauxite

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4324769A (en) * 1979-10-01 1982-04-13 Alumina Development Corporation Extraction and production of alumina containing less than 0.03 percent iron oxide
JPS57145029A (en) * 1981-02-27 1982-09-07 Sumitomo Alum Smelt Co Ltd Extracting method of alumina from mixed type bauxite
US4446117A (en) * 1983-04-04 1984-05-01 Alumina Development Corporation Double digestion system to reduce formation of ferrous iron
CA1330865C (en) * 1989-01-31 1994-07-26 George Dennison Fulford Process for producing alumina from bauxite
GB8906500D0 (en) * 1989-03-21 1989-05-04 Shell Int Research Process for the production of aluminium hydroxide from bauxite
AU668979B2 (en) * 1992-07-24 1996-05-23 Comalco Aluminium Limited Extracting alumina from bauxite
FR2712275B1 (fr) * 1993-11-09 1995-12-15 Pechiney Aluminium Procédé de traitement de bauxites contenant un mélange de trihydrate d'alumine et de monohydrate d'alumine.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4518571A (en) * 1984-02-27 1985-05-21 Vsesojuzny Nauchno-Issledovatelsky I Proektny Institut Aljuminievo Magnievoi I Elektrodnoi Promyshlennosti Process for desilication of aluminate liquors in the production of alumina
WO1994002416A1 (en) * 1992-07-24 1994-02-03 Comalco Aluminium Limited Process for extracting alumina from bauxite

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 101, no. 24, 10 December 1984, Columbus, Ohio, US; abstract no. 213412, SHMIGIDIN, YU. I. ET AL: "Decomposition of high-modulus aluminate solutions from the pilot-plant treatment of nepheline rocks of the Sea of Azov region" XP002081109 *
DATABASE WPI Section Ch Derwent World Patents Index; Class E33, AN 71-53735S, XP002081110 *
KHIM. TEKHNOL. (KIEV) (1984), (2), 18-20 CODEN: KHMTA6;ISSN: 0368-556X *
See also references of WO9606043A1 *

Also Published As

Publication number Publication date
AUPM761194A0 (en) 1994-09-15
CA2197457A1 (en) 1996-02-29
BR9508761A (pt) 1998-01-13
WO1996006043A1 (en) 1996-02-29
EP0777628A1 (de) 1997-06-11

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