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:
Jul. 05, 2016
Filed:
Dec. 13, 2013
Applicant:
Evonik Industries Ag, Essen, DE;
Inventors:
Assignee:
EVONIK DEGUSSA GmbH, Essen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 45/82 (2006.01); C07C 49/307 (2006.01); B01D 3/14 (2006.01); C07C 29/50 (2006.01); C07C 29/80 (2006.01); C07C 45/00 (2006.01); C07C 45/33 (2006.01);
U.S. Cl.
CPC ...
C07C 45/82 (2013.01); C07C 29/50 (2013.01); C07C 29/80 (2013.01); C07C 45/002 (2013.01); C07C 45/33 (2013.01); C07C 49/307 (2013.01); B01D 3/143 (2013.01); C07C 2101/20 (2013.01);
Abstract
A process for removing a cyclododecanone-rich target fraction (A) from a dehydrogenation mixture (O) comprising low boilers (LB), cyclododecanone (CDON), medium boilers (MB), cyclododecanol (CDOL) and high boilers (HB) is provided. According to the process, substantially pure CDON is obtained via a distillative sequence of two side draw columns connected in series, wherein the sidestream of the primary side draw column is fed into the secondary side draw column. From the top of each of the two side draw columns, a CDON-rich fraction is drawn off, and these are combined to form a target fraction, which is essentially pure CDON.