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:
Oct. 07, 1997
Filed:
Apr. 05, 1995
Applicant:
Inventors:
Timothy J Eggeman, Lakewood, CO (US);
Herman P Benecke, Columbus, OH (US);
Assignee:
Chronopol, Inc., Golden, CO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
549274 ; 549349 ;
Abstract
Methods are provided for the production, recovery and purification of cyclic esters. Such methods include producing a cyclic ester composition containing at least one impurity, contacting the cyclic ester composition with at least one adsorbent to remove the impurity and recovering the purified cyclic esters. Also included are methods of cyclic ester purification involving multiple adsorption operations. The methods of the present invention can produce highly purified cyclic esters. Such compositions are suitable for use in the manufacture of polymers having an average degree of polymerization in excess of about 1700.