[go: up one dir, main page]

EP0777628A4 - Improved process for the extraction of alumina from bauxite - Google Patents

Improved process for the extraction of alumina from bauxite

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Withdrawn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
German (de)
French (fr)
Other versions
EP0777628A1 (en
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/en
Publication of EP0777628A4 publication Critical patent/EP0777628A4/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Withdrawn legal-status Critical Current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
    • C01F7/04—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

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)
EP95928901A 1994-08-23 1995-08-23 Improved process for the extraction of alumina from bauxite Withdrawn EP0777628A4 (en)

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 (en) 1997-06-11
EP0777628A4 true EP0777628A4 (en) 1999-06-09

Family

ID=3782132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95928901A Withdrawn EP0777628A4 (en) 1994-08-23 1995-08-23 Improved process for the extraction of alumina from bauxite

Country Status (5)

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

Families Citing this family (13)

* 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
FR2846319B1 (en) * 2002-10-25 2004-12-10 Pechiney Aluminium METHOD OF ATTACKING BAUXITY IMPROVING THE FILTRABILITY OF SLUDGE AT THE END OF ATTACK
FR2860782B1 (en) * 2003-10-10 2006-09-29 Pechiney Aluminium METHOD FOR REDUCING THE HEAT EXCHANGER ENCRASSMENT OF A BAYER CIRCUIT
RU2257347C1 (en) * 2004-02-11 2005-07-27 Акционерное общество "Алюминий Казахстана" Method of complex processing of bauxites
RU2267462C2 (en) * 2004-02-24 2006-01-10 Открытое акционерное общество "Сибирско-Уральская алюминиевая компания" Method for bauxite reprocessing
RU2360865C1 (en) * 2007-12-03 2009-07-10 Государственное образовательное учреждение высшего профессионального образования "Уральский государственный технический университет-УПИ" Processing method of bauxites on alumina
US8029752B2 (en) 2009-04-06 2011-10-04 Nalco Company Approach in controlling DSP scale in bayer process
US9416020B2 (en) 2009-09-25 2016-08-16 Nalco Company Surfactant based small molecules for reducing aluminosilicate scale in the bayer process
US9487408B2 (en) 2009-09-25 2016-11-08 Nalco Company Reducing aluminosilicate scale in the bayer process
CN106542553B (en) * 2015-09-21 2018-05-22 沈阳铝镁设计研究院有限公司 A kind of dissolving-out process method of hydrargillite in alumina producing
CN110563011A (en) * 2019-09-12 2019-12-13 西南能矿集团股份有限公司 Desiliconization agent for preparing alumina and preparation method thereof
WO2024252209A1 (en) 2023-06-08 2024-12-12 3M Innovative Properties Company Alpha alumina-based ceramic material and methods of making same

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 (en) * 1993-11-09 1995-12-15 Pechiney Aluminium Process for the treatment of bauxites containing a mixture of alumina trihydrate and alumina monohydrate.

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

Similar Documents

Publication Publication Date Title
HU895636D0 (en) Process for the separation of aluminium oxide from bauxite
IL121538A (en) Process for the removal of vapor
AU4878290A (en) Process for producing alumina from bauxite
GB2322235B (en) Metals removal process
EP0777628A4 (en) Improved process for the extraction of alumina from bauxite
EP0768928A4 (en) REMOVAL OF BINDER FROM Ta PRODUCTS
ZA955628B (en) Physical separation processes for mineral slurries
EP0950020A4 (en) Removal of silica from bauxite
GB9726117D0 (en) Process for producing alumina
ZA958357B (en) Process for extracting metals from solution
IL129868A0 (en) Process for the synthesis of benzothiopenes
GB9602343D0 (en) Production of alumina
IL117849A0 (en) Process for the purification of glycoproteins
HUP0002119A3 (en) Process for the removal of heavy metals
ZA983793B (en) Process for the recovery of alpha-olefins
GB9209313D0 (en) Process for the extraction of alumina
AU3248195A (en) Improved process for the extraction of alumina from bauxite
IL114214A0 (en) Process for the preparation of peptide trisulfides
GB9725895D0 (en) Process for the removal of contaminants
ZA955641B (en) Process for the separation of lactulose
ZA984676B (en) Process for the recovery of alpha olefins
ZA965895B (en) Process for the preparation of alpha omega-bromochloro-alkanes
IL113555A0 (en) Process for the synthesis of haloalkylferrocenes
GB2285760B (en) Removal of material from surfaces
EG21037A (en) Process for the synthesis of benzathiophenes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19970305

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR IE IT

A4 Supplementary search report drawn up and despatched

Effective date: 19990426

AK Designated contracting states

Kind code of ref document: A4

Designated state(s): DE ES FR IE IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19990710