GB471835A - An improved process for the industrial production of alumina powder - Google Patents

An improved process for the industrial production of alumina powder

Info

Publication number
GB471835A
GB471835A GB32195/36A GB3219536A GB471835A GB 471835 A GB471835 A GB 471835A GB 32195/36 A GB32195/36 A GB 32195/36A GB 3219536 A GB3219536 A GB 3219536A GB 471835 A GB471835 A GB 471835A
Authority
GB
United Kingdom
Prior art keywords
alumina
hydrate
grinding
heating
production
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
GB32195/36A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens 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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB471835A publication Critical patent/GB471835A/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
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C09K3/1409—Abrasive particles per se

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

Alumina powder obtained by grinding industrially produced hydrate of alumina and heating the ground hydrate to 600--900 DEG C. is used in the production of lakes, for instance, with alizarin colours.ALSO:Alumina powder of great uniformity and fineness is obtained by grinding industrially produced hydrate of alumina and heating the ground hydrate at least to a temperature at which it glows to effect partial or complete dehydration thereof. Grinding of the hydrate, preferably in the wet state, may be effected in porcelain mills with flint stones, and temperatures below or above 1000 DEG C. may be used in the heating step. The product may be used as a polishing and grinding agent; in the ceramic industry as a constituent in the manufacture of stoneware and porcelain; or in the production of articles formed of pure alumina or alumina mixed with other highly fireproof oxides. The product obtained by heating the ground hydrate to 600--900 DEG C. may be employed in the production of lakes, for instance with alizarin colours.ALSO:In the production of articles formed of pure alumina or alumina mixed with other highly fireproof oxides, alumina powder is used which is obtained by grinding industrially produced hydrate of alumina and heating the ground hydrate to temperatures below or above 1000 DEG C. to effect partial or complete dehydration thereof.
GB32195/36A 1935-12-01 1936-11-24 An improved process for the industrial production of alumina powder Expired GB471835A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1935S0120642 DE691409C (en) 1935-12-01 1935-12-01 lver

Publications (1)

Publication Number Publication Date
GB471835A true GB471835A (en) 1937-09-13

Family

ID=36942359

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32195/36A Expired GB471835A (en) 1935-12-01 1936-11-24 An improved process for the industrial production of alumina powder

Country Status (3)

Country Link
DE (1) DE691409C (en)
GB (1) GB471835A (en)
NL (1) NL44681C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE932425C (en) * 1951-08-28 1955-09-01 Heinrich Van Dipl-Ing Thiel Process for the production of polishing clay

Also Published As

Publication number Publication date
NL44681C (en) 1938-11-16
DE691409C (en) 1940-05-25

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