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. 25, 1979
Filed:
Jul. 19, 1978
Applicant:
Inventors:
Assignee:
Central Glass Company, Limited, Ube, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01F / ;
U.S. Cl.
CPC ...
423178 ; 423490 ;
Abstract
A process for removing a phosphorus component from fluorite containing such phosphorus component, which process comprises adding powder of the fluorite to an aqueous acid solution having an acid concentration of from 1.0 to 20 Wt% in an inorganic acid/phosphorus ratio of above 25:1 by mole to give a slurry, agitating the slurry at a temperature below 50.degree. C., and collecting the powder from the slurry. The mother liquor obtained after separation of the powder from the slurry may be recycled to the first step.