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. 01, 1994
Filed:
May. 10, 1993
Hideyuki Honda, Kawasaki, JP;
Nippon Sanso Corporation, Tokyo, JP;
Abstract
An air liquefaction separation installation is provided with a rectification column which have a carbon monoxide rectification part connected to the upper part of the rectification column and at upper part of its rectification parts or a main condensation evaporator, a collecting part is provided for withdrawing a part of nitrogen gas having reduced amount of carbon monoxide and/or liquified nitrogen; and a carbon monoxide-containing nitrogen gas withdrawal part and/or liquefied nitrogen gas withdrawal part, connected to the lower part of the carbon monoxide rectification part. According to the present invention, carbon monoxide is removed from nitrogen by a rectification process. Accordingly, cost for installation and operation can be reduced.