GB389359A - Process for the production of alumina and alkali phosphates - Google Patents

Process for the production of alumina and alkali phosphates

Info

Publication number
GB389359A
GB389359A GB20945/32A GB2094532A GB389359A GB 389359 A GB389359 A GB 389359A GB 20945/32 A GB20945/32 A GB 20945/32A GB 2094532 A GB2094532 A GB 2094532A GB 389359 A GB389359 A GB 389359A
Authority
GB
United Kingdom
Prior art keywords
alkali
phosphate
alumina
sodium
caustic
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
GB20945/32A
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.)
Huels AG
Original Assignee
Chemische Werke Huels 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 Chemische Werke Huels AG filed Critical Chemische Werke Huels AG
Publication of GB389359A publication Critical patent/GB389359A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/30—Alkali metal phosphates
    • C01B25/305—Preparation from phosphorus-containing compounds by alkaline treatment
    • C01B25/306—Preparation from phosphorus-containing compounds by alkaline treatment from phosphates
    • 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
    • C01F7/0673—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 from phosphate-containing minerals

Landscapes

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

Abstract

The product obtained by calcining aluminium phosphate with caustic alkali, alkali carbonate, or alkali sulphate and carbon is leached with caustic alkali and from the solution obtained alkali phosphate is separated by crystallization and a part of the alumina by hydrolysis; the mother liquor, containing free caustic alkali and sodium aluminate, with residual alkali phosphate, is used as leaching agent for the next batch of decomposed phosphate. In an example, a mixture of phosphate and sodium carbonate is reacted at 800 DEG C. in a rotary furnace. The solution obtained by leaching with caustic soda is filtered from the residue above 75 DEG C. and then cooled to 17 DEG C. to separate the bulk of the sodium phosphate. About half the alumina is then precipitated by hydrolysis at 30 DEG C., and the mother liquor used for the leaching step in a second operation. By using waste alkali lyes from the artificial silk or bauxite industries for effecting the original leach, large crystals of sodium phosphate are obtained and the alumina is separated substantially free from silica.
GB20945/32A 1931-07-25 1932-07-25 Process for the production of alumina and alkali phosphates Expired GB389359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE389359X 1931-07-25

Publications (1)

Publication Number Publication Date
GB389359A true GB389359A (en) 1933-03-16

Family

ID=6371402

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20945/32A Expired GB389359A (en) 1931-07-25 1932-07-25 Process for the production of alumina and alkali phosphates

Country Status (1)

Country Link
GB (1) GB389359A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016238A (en) * 1975-08-29 1977-04-05 Urbina Davalos Fernando Process for the obtention of alumina and phosphate values by the alkaline decomposition of silica-containing aluminum phosphate ores
GB2142007A (en) * 1983-06-24 1985-01-09 Griffith Thomas Alkaline processing of phosphates

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016238A (en) * 1975-08-29 1977-04-05 Urbina Davalos Fernando Process for the obtention of alumina and phosphate values by the alkaline decomposition of silica-containing aluminum phosphate ores
GB2142007A (en) * 1983-06-24 1985-01-09 Griffith Thomas Alkaline processing of phosphates
FR2549031A1 (en) * 1983-06-24 1985-01-18 Griffith Thomas ALKALINE TREATMENT OF CALCIUM PHOSPHATES, ALUMINUM AND NATURAL IRON
US4668487A (en) * 1983-06-24 1987-05-26 Griffith Thomas Alkaline processing of naturally occurring calcium aluminium and iron phosphates

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