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. 30, 1980
Filed:
Sep. 04, 1979
Jurgen Grosse, Hurth, DE;
Hoechst Aktiengesellschaft, , DE;
Abstract
The invention relates to an improved process for making amine salts of acid O,S-dialkylthiophosphoric acid esters of the general formula (I) ##STR1## in which R.sub.1 stands for the ammonium ion of primary or secondary aliphatic, cycloaliphatic or aromatic amines or of a heterocyclic nitrogen base and R.sub.2 and R.sub.3 each stand for an alkyl group by subjecting an O,O,S-trialkyl-thiophosphate to partial dealkylation and forming the salt of the dealkylated product by treatment with an amine corresponding to the ammonium ion R.sub.1. In the improved process an O,O,S-trialkylthiophosphate of the general formula (II) ##STR2## in which R.sub.2 and R.sub.3 have the meanings given above, is mixed with at least stoechiometric proportions of water and an amine corresponding to the ammonium ion R.sub.1, the resulting mixture is reacted, with agitation, over a period of about 3 to 8 hours at a temperature within the range 0.degree. to 120.degree. C., and the amine salt of the general formula (I) is separated from the reaction mixture.