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:
Jul. 27, 1976
Filed:
Sep. 26, 1973
Applicant:
Inventors:
Wolf Becker, Cologne, DT;
Wolfgang Weiss, Cologne, DT;
Assignee:
Bayer Aktiengesellschaft, , DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C01B / ; C01B / ; C01B / ;
U.S. Cl.
CPC ...
423483 ; 423341 ; 423488 ;
Abstract
Recovery of hydrofluoric acid from aqueous fluosilicic acid by treating said aqueous fluosilicic acid at a temperature of from 100.degree. to 300.degree.C. and under a pressure of from 3 to 80 atmospheres and separating resulting hydrogen fluoride containing aqueous phase and silicon tetrafluoride containing gaseous phase and optionally hydrolyzing the silicon tetrafluoride containing gaseous phase in aqueous medium and recycling the aqueous fluosilicic acid to the process as starting material.