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:
Nov. 25, 1980
Filed:
May. 10, 1979
Louis Schneider, Elizabeth, NJ (US);
Bruce M Resnick, West Patterson, NJ (US);
GAF Corporation, New York, NY (US);
Abstract
The present invention provides an improved process of isolating purified, free 1-(alkoxyphenyl)-5-(phenyl)biguanide compounds, from a crude acid reaction mixture thereof. The compounds have the formula: ##STR1## where R is alkyl, linear of branched, having from 1-14 carbon atoms, and are useful as agricultural fungicides. The process comprises neutralizing the crude acid reaction mixture with aqueous base to precipitate the crude, free biguanide, filtering, slurrying the precipitate with a purification solvent which is an aliphatic hydrocarbon straight chain or branched, having from 5-10 carbon atoms, or mixtures thereof, filtering the slurry, and, drying the solid. Hexane is preferred as the purification solvent.