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. 24, 1991
Filed:
Dec. 18, 1989
Applicant:
Inventors:
John T Burton, St. Lazare, CA;
Drew J Drexler, Guelph, CA;
Assignee:
Marsulex Inc., Ontario, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423265 ; 25240021 ; 25240022 ; 423522 ;
Abstract
The present invention provides a stabilized concentrated sulphuric acid composition containing a chemical additive selected from a group of aminoalkylphosphonates that increases the precipitation threshold of impurities in solution, thereby suppressing the precipitation of said impurities and the formation of 'cloudy acid'.