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:
Nov. 13, 1984
Filed:
Sep. 24, 1982
Applicant:
Inventor:
Gautam R Ranade, Grand Island, NY (US);
Assignee:
Occidental Chemical Corporation, Niagara Falls, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 86 ; 203D / ; 2604 / ; 560 11 ; 560 18 ; 560 21 ; 560 37 ; 560 52 ; 560 73 ; 560 85 ; 568 15 ;
Abstract
An improved process for preparing diaryl esters of dicarboxylic acids is disclosed, in which the esterification reaction is optimized by removing water and other by-products of the reaction according to a predetermined pattern. The removal of water and other by-products of the esterification reaction is most easily carried out by a distillation means, and the rate of removal is controlled by varying the reflux ratio in the distillation means during the course of the esterification reaction. The diaryl esters so prepared are useful in making linear polyesters.