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:
Apr. 01, 1997
Filed:
Feb. 28, 1995
William P Enlow, Belpre, OH (US);
James A Mahood, Morgantown, WV (US);
General Electric Company, Pittsfield, MA (US);
Abstract
A process is provided for making 2,2 bisphenyl phosphites and 2,2 biphenyl phosphites. The process provides pure product without requiring a recrystallization step. The process involves reacting phosphorous trichloride with either (a) an aromatic diphenol selected from the group of bisphenyl and biphenyls or (b) a monohydroxy hydrocarbon compound, to induce a first product, and then reacting the first product with the other of (a) and (b) in the presence of an amount of tri-n-alkylamine sufficient to neutralize the hydrochloric acid produced in the second reaction, and utilizing an aromatic liquid hydrocarbon medium and a minimum amount to facilitate precipitation of the resultant aromatic phosphite.