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:
Dec. 09, 1980
Filed:
Apr. 03, 1979
Applicant:
Inventors:
Alfred Schmidt, Vienna, AT;
Wilhelm Tschebull, Linz, AT;
Assignee:
Chemie Linz Aktiengesellschaft, Linz, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F / ;
U.S. Cl.
CPC ...
423489 ; 423495 ;
Abstract
Aluminum fluoride with an AlF.sub.3 content of at least 96% by weight relative to the anhydrous product is produced by reacting aluminum hydroxide with aqueous fluosilicic acid, removing the precipitated silica, adding hydrofluoric acid in a quantity of 0.1-1% by weight of HF relative to the so produced AlF.sub.3 containing solution having an AlF.sub.3 content of 20 to 50 percent and atomizing same before the start of crystallization of the aluminum fluoride at temperatures of 110.degree.-350.degree. C. optionally using aluminum fluoride particles as heat transfer agents.