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:
Sep. 13, 1994
Filed:
Mar. 16, 1993
Applicant:
Inventors:
Isao Kaneshige, Kurashiki, JP;
Tsuneo Genba, Okayama, JP;
Takeshi Tamaru, Okayama, JP;
Tetsuhiko Matsuura, Bizen, JP;
Assignee:
Kuraray Chemical Co., Ltd., Bizen, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
95103 ; 95119 ; 95138 ; 95148 ;
Abstract
A process for separating nitrogen which comprises, with a nitrogen gas separation apparatus of a pressure-swing adsorption type, a gas transfer step between an adsorber having completed an adsorption step with another adsorber having completed a regeneration step. The gas transfer step further comprising discharging part of the gas being transferred out of the system. This process provides, with compact equipment, high-purity product nitrogen with a purity of at least 99.99%, which has been considered difficult to obtain with conventional pressure-swing adsorption apparatuses.