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:
Oct. 08, 1991
Filed:
Oct. 31, 1989
Applicant:
Inventors:
Kim D Nguyen, Waterloo, Ontario, CA;
Donald R Spink, Waterloo, Ontario, CA;
Assignee:
Alpine Plant Foods Limited, New Hamburg, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C05B / ;
U.S. Cl.
CPC ...
71 34 ; 71 35 ; 423309 ;
Abstract
Potassium phosphate useful as a low-chloride content fertilizer is prepared by reacting phosphoric acid, commercial or technical grade, with fertilizer-grade potassium chloride (Muriate of Potash, 60-63% K.sub.2 O) at a reaction temperature of about 130.degree. to about 200.degree. C. and a mole ratio of phosphorus to potassium of at least about 1.3:1. The vaporization of hydrogen chloride from the reaction mixture is effected by a novel technique combining air followed by steam stripping. The reaction product is used to produce various types as well as grades of fertilizers.