GB1186389A - A Process for the Continuous Extraction of Bauxite with Sodium Aluminate Liquor in a Digester Tube - Google Patents

A Process for the Continuous Extraction of Bauxite with Sodium Aluminate Liquor in a Digester Tube

Info

Publication number
GB1186389A
GB1186389A GB51359/67A GB5135967A GB1186389A GB 1186389 A GB1186389 A GB 1186389A GB 51359/67 A GB51359/67 A GB 51359/67A GB 5135967 A GB5135967 A GB 5135967A GB 1186389 A GB1186389 A GB 1186389A
Authority
GB
United Kingdom
Prior art keywords
bauxite
suspension
sodium aluminate
tube
continuous extraction
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
Application number
GB51359/67A
Inventor
Klaus Joachim Tusche
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.)
Vereinigte Aluminium Werke AG
Original Assignee
Vereinigte Aluminium Werke AG
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 Vereinigte Aluminium Werke AG filed Critical Vereinigte Aluminium Werke AG
Publication of GB1186389A publication Critical patent/GB1186389A/en
Expired 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
    • C01F7/064—Apparatus for digestion, e.g. digestor vessels or heat exchangers
    • 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
    • C01F7/0626—Processes making use of tube digestion only

Abstract

1,186,389. Extraction of bauxite. VEREINIGTE ALUMINIUM-WERKE A.G. 10 Nov., 1967 [6 May, 1967], No. 51359/67. Heading C1A. A process for the continuous extraction of bauxite with a caustic solution of sodium aluminate comprises conducting a suspension of bauxite in the solution through a tube of substantially constant cross-section at a velocity of 0À5 to 7 m./sec., preferably 2 to 5 m./sec., at a volumetric throughput rate of 0À01 to 0À5 cub. m./metric ton of alumina per day and heat - ing the suspension to a temperature at which digestion occurs so that digestion is substantially complete when the suspension leaves the tube. The heating is preferably carried out in stages in an apparatus described in Specification 1,186,390, the first stage being heated by vapour from a decompression plant, the second by contact with a jacket containing digested suspension and the third by fresh heat by means of steam, organic heat carrier or a salt. Throughput of the process is preferably 10 to 160 cub. m./hr. of suspension at a temperature of 200‹ to 300‹ C.
GB51359/67A 1967-05-06 1967-11-10 A Process for the Continuous Extraction of Bauxite with Sodium Aluminate Liquor in a Digester Tube Expired GB1186389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV0033613 1967-05-06

Publications (1)

Publication Number Publication Date
GB1186389A true GB1186389A (en) 1970-04-02

Family

ID=7588243

Family Applications (2)

Application Number Title Priority Date Filing Date
GB03404/69A Expired GB1186390A (en) 1967-05-06 1967-11-10 Apparatus for the Continuous Extraction of Bauxite with Sodium Aluminate Liquor in a Digester Tube
GB51359/67A Expired GB1186389A (en) 1967-05-06 1967-11-10 A Process for the Continuous Extraction of Bauxite with Sodium Aluminate Liquor in a Digester Tube

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB03404/69A Expired GB1186390A (en) 1967-05-06 1967-11-10 Apparatus for the Continuous Extraction of Bauxite with Sodium Aluminate Liquor in a Digester Tube

Country Status (5)

Country Link
JP (2) JPS5549008B1 (en)
DE (1) DE1592194B2 (en)
GB (2) GB1186390A (en)
NL (1) NL6806312A (en)
YU (1) YU33672B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647439A (en) * 1985-05-29 1987-03-03 Aluminium Pechiney Process for the continuous production of alumina from bauxites containing monohydrates using the bayer process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407922C3 (en) * 1973-02-26 1985-08-29 Sumitomo Aluminium Smelting Co., Ltd., Osaka Process for the preparation of aqueous solutions of basic aluminum salts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647439A (en) * 1985-05-29 1987-03-03 Aluminium Pechiney Process for the continuous production of alumina from bauxites containing monohydrates using the bayer process

Also Published As

Publication number Publication date
GB1186390A (en) 1970-04-02
JPS5545490B1 (en) 1980-11-18
NL6806312A (en) 1968-11-07
JPS5549008B1 (en) 1980-12-09
DE1592194B2 (en) 1970-09-24
YU33672B (en) 1977-12-31
DE1592194A1 (en) 1970-09-24
YU234167A (en) 1977-06-30

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414B Case decided by the comptroller ** grants allowed (sect. 14/1949)
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years