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:
Jan. 19, 1982
Filed:
May. 19, 1980
Applicant:
Inventors:
John S Chiang, Mercerville, NJ (US);
William S Moore, Princeton Junction, NJ (US);
Assignee:
FMC Corporation, Philadelphia, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
4233 / ;
Abstract
Organic phosphate solvents used in the extraction of phosphoric acid from impure phosphoric acid solutions, and from which the phosphoric acid has been stripped, are washed with an aqueous alkali orthophosphate solution to remove impurities, particularly silica, fluorine and organic impurities, from the solvent prior to re-use.