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. 28, 1995
Filed:
Oct. 19, 1994
Abstract
Ultra-high purity nitrogen is generated by feeding feed air to a carbon dioxide eliminator-drier and a primary rectification column, thereby removing catalyst poisons for an oxidation catalyst used for oxidation of carbon monoxide and hydrogen in the feed air by the carbon dioxide eliminator-drier and the primary rectification column. A part of low purity nitrogen gas separated in the primary rectification column is condensed and liquefied by a condenser. The raw nitrogen gas which has not been condensed and liquefied in the condenser is warmed to normal temperature by a heat exchanger and compressed by a recyclic compressor so that the pressure thereof is increased and the temperature thereof is raised. Carbon monoxide and hydrogen are oxidized in an oxidation column and the resulting carbon dioxide and water are removed by an adsorption column.