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. 14, 2015
Filed:
Jun. 29, 2011
Applicants:
Daniel Witte, Grenzach-Wyhlen, DE;
Thomas Isenschmid, Magden, CH;
Manuel Steiner, Basel, CH;
Inventors:
Assignee:
List Holding AG, Arisdorf, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 63/00 (2006.01); C08F 6/12 (2006.01); B01J 3/00 (2006.01); B01J 8/00 (2006.01); C08G 63/02 (2006.01);
U.S. Cl.
CPC ...
C08F 6/12 (2013.01); B01J 3/008 (2013.01); B01J 8/005 (2013.01);
Abstract
A process for thermal separation of a solution comprised of a thermoplastic polymer and a solvent involves heating a solvent under pressure above a critical point of the solvent; decompressing the heated solvent in a first vessel, such that a polymer-rich and a low-polymer phase form; and supplying the polymer-rich phase to a second vessel. In embodiments, on entry into the second vessel, a pressure jump occurs, the pressure jump leading to a thermal flash in the second vessel such that a polymer part of the polymer-rich phase rises to at least 70%, and a resulting polymer-rich solution is provided.