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:
Mar. 17, 1981
Filed:
Nov. 29, 1978
Applicant:
Inventors:
Assignee:
Otsuka Chemical Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423300 ;
Abstract
An improved process for preparing tri- and tetraphosphonitrilic chlorides in a shortened period of time in high yields by reacting ammonium chloride with phosphorus pentachloride produced simultaneously with the progress of the reaction from phosphorus trichloride and chlorine, in an organic solvent inert to chlorine in the presence of a catalyst, while adding dropwise phosphorus trichloride and supplying chlorine gas to the reaction system.