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:
Dec. 18, 2012
Filed:
Sep. 12, 2007
Applicants:
Axel König, Herzogenaurach, DE;
Manfred Stepanski, Buchs, CH;
Andrzej Kuszlik, Buchs, CH;
Inventors:
Assignee:
Sulzcr Chemtech AG, Winterthur, CH;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method for the purification of an ionic liquid by means of fractional crystallization in which a part of the ionic liquid is crystallized and the crystallizate formed is separated from the liquid remainder. In this respect the ionic liquid is charged with a certain amount of at least one entrainer substance.