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:
Feb. 14, 1978
Filed:
Sep. 16, 1976
Applicant:
Inventors:
Ludwig A Hartmann, Wilmington, DE (US);
Richard L West, Wilmington, DE (US);
Assignee:
ICI Americas Inc., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
An improved process for the preparation of 3-(4-lithiosulfophenoxy)-1,2-propanediol relatively free from inorganic impurities is represented wherein the subject material is made by reacting lithiosulfophenol with either glycerol monochlorhydrin or epichlorohydrin in aqueous solution in the presence of an alkaline calcium compound and thereafter purifying by removing the calcium sulfate and hydrochloric acid from the aqueous reaction media. The subject material can be obtained at purities of 98% in yields exceeding 70%.