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. 05, 1991
Filed:
May. 02, 1990
Applicant:
Inventor:
Paul L Hensler, Lawrence, KS (US);
Assignee:
FMC Corporation, Philadelphia, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423305 ;
Abstract
Process for producing granular tetrasodium pyrophosphate having a bulk density of about 0.73 to about 0.84 g/ml and a dissolving time of about three minutes or less by heating crystalline disodium orthophosphate dihydrate at a slow heating rate, not over about 5.degree. C. per minute, until its temperature reaches about 130.degree. C. and then calcining it at about 350.degree. C. to about 550.degree. C. until it is converted to tetrasodium pyrophosphate.