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:
Nov. 15, 2011
Filed:
Jul. 26, 2006
Applicants:
Rodolfo Rohr, Campinas, BR;
Ali Nikzad, Zurich, CH;
Andrzej K. Kuszlik, Buchs, CH;
Inventors:
Assignees:
Sulzer Chemtech AG, Winterthur, CH;
Resitec Participacoes Ltda, Campinas, BR;
Primary Examiner:
Int. Cl.
CPC ...
C07J 9/00 (2006.01); B01D 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention relates to a method and a device for purifying and/or separating preferably high melting organic raw products or compound mixtures containing, in particular, high melting and/or degradable sterols, by layer crystallization on first heat exchanger surfaces. The raw product is received in a solvent or solvent mixture, and then brought into contact with heat exchanger surfaces. The desired product crystallizes on the heat exchanger surfaces by slow cooling. Solvent evaporating during the crystallization or sweating process is condensed and returned to the mixture.