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. 18, 2003
Filed:
Aug. 22, 2002
Kazuhiko Sakamoto, Himeji, JP;
Sei Nakahara, Himeji, JP;
Masatoshi Ueoka, Himeji, JP;
Naoto Kasaya, Himeji, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
The present invention provides a column treating method by use of a distillation column and so on, which method enables to effectively remove solid impurities such as precipitates and polymers contained or produced in a treating fluid, and to thereby stably operate the column treatment. Solid impurities in a treating fluid can be removed by carrying out: step (a) of drawing out the treating fluid from a drawing out outlet ( ) at the column bottom of the treatment column ( ) outside the treatment column ( ), step (b) of removing solid impurities from the treating fluid, drawn out in step (a), by a strainer ( ), and step (c) of returning the treating fluid, from which the solid impurities are removed in step (b), to a returning inlet ( ) of the treatment column, with advancing physical and/or chemical treatment of the treating fluid in the treatment column ( ).