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. 18, 2019
Filed:
Oct. 17, 2013
Applicant:
Uhde Inventa-fischer Gmbh, Berlin, DE;
Inventors:
Rainer Hagen, Berlin, DE;
Udo Mühlbauer, Berlin, DE;
Assignee:
UHDE INVENTA-FISCHER GMBH, Berlin, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 7/02 (2006.01); C07D 319/12 (2006.01); B01D 5/00 (2006.01); B01D 3/10 (2006.01); C08G 63/08 (2006.01); C08G 63/78 (2006.01); C08G 63/90 (2006.01);
U.S. Cl.
CPC ...
B01D 7/02 (2013.01); B01D 3/101 (2013.01); B01D 3/105 (2013.01); B01D 5/0003 (2013.01); B01D 5/0045 (2013.01); C07D 319/12 (2013.01); C08G 63/08 (2013.01); C08G 63/785 (2013.01); C08G 63/90 (2013.01);
Abstract
The present invention relates to a device and also to a method for separating and recovering a cyclic diester, in particular dilactide or glycolide from polymer melts which include the cyclic diester as impurity. The device and also the method according to the invention allow recovery of the cyclic diester with a high yield and at the same time high purity.