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:
Oct. 31, 2006
Filed:
Oct. 20, 2000
Applicants:
Geert-jan Witkamp, Bergschenhoek, NL;
Johannes Pieter Vrijenhoef, Brielle, NL;
Johannes DE Graauw, Zoetermeer, NL;
Frank Van Der Ham, Edmonton, CA;
Inventors:
Geert-Jan Witkamp, Bergschenhoek, NL;
Johannes Pieter Vrijenhoef, Brielle, NL;
Johannes de Graauw, Zoetermeer, NL;
Frank van der Ham, Edmonton, CA;
Assignees:
Technische Universiteit Delft, Delft, NL;
Kemira GrowHow Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 9/04 (2006.01); B01D 35/18 (2006.01); C02F 1/22 (2006.01); C02F 1/00 (2006.01); C01F 11/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention is directed to a process for recovering a crystalline material from an aqueous solution, which solution also contains organic contaminants, in which process the material is crystallised from the aqueous solution by freeze crystallising at a eutectic freezing point of the solution.