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:
Aug. 24, 1993
Filed:
Oct. 14, 1992
Applicant:
Inventors:
Tzong-Jeng Chu, Kaohsiung Shan, TW;
Neng-Hui Chu, Kaohsiung Shan, TW;
Peng-Fei Lee, Kaohsiung Shan, TW;
Assignee:
Shiny Chemical Industrial Co., Ltd., Kaohsiung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560263 ;
Abstract
A propylene glycol monomethyl ether propionate compound is obtained by the esterification of propylene glycol monomethyl ether with propionic acid at an elevated temperature above 80 .degree.C. in the presence of acidic catalyst and azeotropic agent. This compound is rectified for removing acid residue and moisture in order to yield the desirable product having high purity.