GB742574A - Process and means for the manufacture of alumina - Google Patents

Process and means for the manufacture of alumina

Info

Publication number
GB742574A
GB742574A GB26480/51A GB2648051A GB742574A GB 742574 A GB742574 A GB 742574A GB 26480/51 A GB26480/51 A GB 26480/51A GB 2648051 A GB2648051 A GB 2648051A GB 742574 A GB742574 A GB 742574A
Authority
GB
United Kingdom
Prior art keywords
alumina
water
pressure
soda
manufacture
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
GB26480/51A
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.)
Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
Original Assignee
Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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 Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU filed Critical Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
Publication of GB742574A publication Critical patent/GB742574A/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
    • C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
    • C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
    • 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

Abstract

<PICT:0742574/III/1> Alumina having a very small percentage of soda is prepared by treating a soda-containing monoclinic alumina of the Gibbsite type, with water or a dilute solution of ammonium sulphate, chloride, &c. at 180-230 DEG C. and at a pressure of at least 15 kg./cm.2, recrystallizing under the same temperature and pressure to the less hydrated rhombohedral form, and washing the product. An apparatus suitable for the process consists of a vessel 1 in which water is boiled under pressure, connected by a steam pipe 8 to a tank 5 containing the alumina, which is extracted by the water condensing on the lower ends of metal rods 3 passing through cover 4. A tube 7 is provided for the return of the condensed water to the boiler.
GB26480/51A 1950-12-05 1951-11-12 Process and means for the manufacture of alumina Expired GB742574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR742574X 1950-12-05

Publications (1)

Publication Number Publication Date
GB742574A true GB742574A (en) 1955-12-30

Family

ID=9141647

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26480/51A Expired GB742574A (en) 1950-12-05 1951-11-12 Process and means for the manufacture of alumina

Country Status (1)

Country Link
GB (1) GB742574A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487756A (en) * 1982-08-24 1984-12-11 Swiss Aluminium Ltd. Process for manufacturing crystalline alumina

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487756A (en) * 1982-08-24 1984-12-11 Swiss Aluminium Ltd. Process for manufacturing crystalline alumina

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