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:
Apr. 24, 2012
Filed:
Mar. 07, 2006
Keizo Takegami, Chuo-ku, JP;
Junji Wakayama, Chuo-ku, JP;
Kiwamu Ishii, Chuo-ku, JP;
Kenji Ouchi, Chuo-ku, JP;
Keizo Takegami, Chuo-ku, JP;
Junji Wakayama, Chuo-ku, JP;
Kiwamu Ishii, Chuo-ku, JP;
Kenji Ouchi, Chuo-ku, JP;
Tsukishima Kikai Co., Ltd., Tokyo, JP;
Abstract
A method including carrying out adiabatic cooling and evaporation operation of a coolant in a crystallizer () for a mixture solution of a target organic compound containing the coolant; taking out crystal slurry produced by the operation from the crystallizer (); pressurizing evaporated vapor to a pressure higher than the operation pressure in the crystallizer () by a compressor () and then introducing the vapor to an absorption condenser (); cooling for condensation the mixture solution of organic compound and the evaporated vapor that has been pressurized while allowing them to contact each other in the absorption condenser (); introducing the crystal slurry taken out of the crystallizer () to a purification means () for purification of the crystal; and introducing a clarified liquid in the purification means () to at least one of the crystallizer () and the absorption condenser ().