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:
Jun. 29, 2010
Filed:
May. 26, 2003
Tadahiro Ohmi, Sendai-shi, Miyagi-ken, JP;
Ryuichi Yazaki, Iwatsuki, JP;
Masato Kawai, Yokohama, JP;
Tetsuya Kimijima, Tsuchiura, JP;
Kunio Matsuda, Utsunomiya, JP;
Tadahiro Ohmi, Sendai-shi, Miyagi-ken, JP;
Ryuichi Yazaki, Iwatsuki, JP;
Masato Kawai, Yokohama, JP;
Tetsuya Kimijima, Tsuchiura, JP;
Kunio Matsuda, Utsunomiya, JP;
Taiyo Nippon Sanso Corporation, Tokyo, JP;
Other;
Abstract
This gas purifying process removes trace constituents from a mixed gas that includes a rare gas and nitrogen as main components, and at least one from among hydrogen, nitrogen and hydrogen reaction products, and water vapor as the trace constituent. This process sequentially carries out an adsorbing step for removing water vapor and nitrogen and hydrogen reaction products; a hydrogen oxidation step for converting the hydrogen into water vapor by means of a hydrogen oxidation catalytic reaction in the presence of oxygen; and a drying step for removing water vapor generated in the hydrogen oxidation step. When nitrogen oxides are included as a trace constituent, then a denitration step is carried out prior to the adsorbing step, to convert nitrogen oxides into nitrogen and water vapor by means of a catalytic denitration reaction in the presence of a reducing substance.