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:
May. 14, 2002
Filed:
Apr. 28, 1999
Robert M. Farner, West Lafayette, IN (US);
David W. Bartley, West Lafayette, IN (US);
Jon D. Lehmkuhler, Lebanon, IN (US);
PABU Services, Inc., Wilmington, DE (US);
Abstract
A method of making phosphoric acid esters by continuously reacting a phosphorus oxyhalide with a polyol to produce at least about 60% normalized monomeric halophosphate intermediate, and then reacting the monomeric halophosphate intermediate with an alcohol to produce a desired phosphoric acid ester is provided. In other embodiments, the reaction of the monomeric halophosphate intermediate with the alcohol can also be carried out continuously. Another aspect of the invention provides a method of making phosphoric acid esters by continuously reacting a phosphorus oxyhalide with a monohydric alcohol to produce at least about 60% normalized monohalomonophosphate diester intermediate, and then reacting the monohalomonophosphate diester intermediate with a polyol to produce a phosphoric acid ester. In other embodiments, the reaction of the monohalomonophosphate diester intermediate with the polyol may also be carried out continuously.