The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 1978
Filed:
May. 20, 1976
Applicant:
Inventors:
Lothar Reh, Frankfurt am Main, DT;
Ludolf Plass, Kronberg, DT;
Hans Werner Schmidt, Frankfurt am Main, DT;
Gunter Schoene, Kelsterbach, DT;
Philippe Marchessaux, Aix en Provence, FR;
Assignee:
Aluminum Pechiney, Lyon, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F / ;
U.S. Cl.
CPC ...
423625 ; 423D / ; 423481 ; 34 10 ; 34 11 ; 432 15 ; 23262 ; 2327 / ; 23284 ;
Abstract
Process for the thermal decomposition of aluminum chloride hexahydrate into anhydrous Al.sub.2 O.sub.3, comprising predrying and then decomposition in a fluidization reactor, the said fluidization being ensured by recycled gaseous HCl, and finally heating at the temperature necessary to obtain the desired crystallization state, namely anhydrous Al.sub.2 O.sub.3, the said pre-drying being carried out by the gases coming from this final heating.