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. 08, 2013
Filed:
Jun. 16, 2006
Akira Yoshino, Osaka, JP;
Koji Tanaka, Osakasayama, JP;
Ryosuke Matsubayashi, Sakai, JP;
Junya Suenaga, Sakai, JP;
Shinya Okumura, Sakai, JP;
Akira Yoshino, Osaka, JP;
Koji Tanaka, Osakasayama, JP;
Ryosuke Matsubayashi, Sakai, JP;
Junya Suenaga, Sakai, JP;
Shinya Okumura, Sakai, JP;
Air Water Inc., Sapporo-shi, Hokkaido, JP;
Abstract
There is provided a method of generating nitrogen which includes cryogenically separating compressed air introduced into a high-pressure column, storing liquid airin a bottom portion of the high-pressure columnand taking nitrogen in gaseous form from an upper portion of the high-pressure column, introducing the liquid airstored in the bottom portion of the high-pressure columninto a low-pressure column, cryogenically separating the liquid airintroduced into the low-pressure columnand storing oxygen-enriched liquid airin a bottom portion of the low-pressure columnand taking nitrogen in gaseous form from an upper portion of the low-pressure columnas a product gas. Liquid airtaken through an extraction pipeis introduced into a portion of a rectification partof the low-pressure columnin which the number of theoretical plates from a column bottom side is set within the range of one to ten.