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. 16, 2004
Filed:
Jul. 16, 2003
Applicant:
Inventors:
Kenji Nakahara, Himeji, JP;
Tsukasa Takahashi, Himeji, JP;
Assignee:
Nippon Shokubai Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01D 7/02 ;
U.S. Cl.
CPC ...
B01D 7/02 ;
Abstract
The present invention relates to a process for recovering subliming substances, which deposit in the form of crystals, from a subliming substance-containing gas by combining a cooling operation for lowering the temperature of collecting tubes for the deposition of crystals below the temperature at which the crystals deposit with a heating operation for heightening the temperature of the collecting tubes above the temperature at which the crystals deposit. A subliming substance is continuously recovered in the form of crystals at a high ratio without suffering the recovered crystals from developing a color.