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. 19, 1982
Filed:
Feb. 04, 1976
Hilmar Roszinski, Kendenich near Cologne, DE;
Heinz Harnisch, Lovenich near Cologne, DE;
Hoechst Aktiengesellschaft, Hurth Knapsack, DE;
Abstract
Production of O,O-dialkylthionophosphoric acid chlorides of the general formula: ##STR1## in which R is an alkyl radical having from 1 to 6 carbon atoms, by reacting a dialkyldithiophosphoric with chlorine. A reactor is supplied with O,O-dialkyldithiophosphoric acid and chlorine is added thereto at a temperature lower than about 75.degree. C.; following completion of the chlorine addition, the reactor is supplied with a further portion of O,O-dialkyldithiophosphoric acid at a temperature between 0.degree. and 75.degree. C., and the resulting reaction mixture is distilled to isolate O,O-dialkylthionophosphoric acid chloride therefrom.