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:
Jun. 14, 2005
Filed:
Mar. 24, 2003
Applicants:
Yanhui Sun, Wilmington, DE (US);
Shaorong Chen, Wilmington, DE (US);
Inventors:
Yanhui Sun, Wilmington, DE (US);
Shaorong Chen, Wilmington, DE (US);
Assignee:
Invista North America S.àr.l., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C309/00 ;
U.S. Cl.
CPC ...
Abstract
Disclosed herein is a process for preparing 4-(2-sulfoethylcyclohexane)-1,2-diol sodium salt, at ambient condition and in the presence of a buffer and an initiator, from vinylcyclohexane-1,2-diol. Also disclosed is a process for preparing 3-(2-sulfoethyl) hexanedioic acid, sodium salt by oxidizing 4-(2-sulfoethylcyclohexane)-1,2 diol sodium salt with hydrogen peroxide in the presence of tungstic acid.