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:
Jul. 21, 1981
Filed:
Feb. 12, 1980
Ryuichi Yamamoto, Shirogane, JP;
Masaaki Torisu, Suwa, JP;
Mitsui Toatsu Chemicals Inc., Tokyo, JP;
Abstract
Disclosed is a process for the preparation of an aminoaryl thiophosphate or phosphate which comprises hydrolyzing an N-acetylaminoaryl thiophosphate or phosphate by heating it in an aqueous solution of a mineral acid. The N-acetylaminoaryl thiophosphate or phosphate can be obtained by condensing an anhydrous alkali metal salt of an N-acetylaminophenol with phosphorus thiochloride or phosphorus oxychloride at a high temperature in the presence of an inert organic solvent or by condensing an N-acetylaminophenol with phosphorus thiochloride or phosphorus oxychloride in the presence of an alkali metal hydroxide or carbonate, water, and an organic solvent.