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. 10, 2014
Filed:
Apr. 01, 2013
Juan Herguijuela, Auggen, DE;
Werner Pietzonka, Therwil, CH;
Angela Wildermann, Bad Sackingen, DE;
Thomas Wolf, Rhienfelden, DE;
Juan Herguijuela, Auggen, DE;
Werner Pietzonka, Therwil, CH;
Angela Wildermann, Bad Sackingen, DE;
Thomas Wolf, Rhienfelden, DE;
DSM IP Assets B.V., Heerlen, NL;
Abstract
A process for the rectification of mixtures of high-boiling air- and/or temperature-sensitive substances which require a high separation efficiency is proposed, in particular a process for the working-up of a VE- or VEA-containing product stream. The process includes a first purification stage to separate low-boiling products and unspecified isomers of the useful product from the product stream virtually without loss of useful product and a second purification stage for removing the useful product in a stream having a purity of >97% by weight and a further stream having a purity of >92% by weight.