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:
May. 24, 2005
Filed:
Feb. 12, 2001
Atsushi Tatani, Tokyo, JP;
Makoto Susaki, Tokyo, JP;
Kazuaki Kimura, Tokyo, JP;
Taku Shimizu, Tokyo, JP;
Toshikuni Sera, Hiroshima-ken, JP;
Kenji Inoue, Hiroshima-ken, JP;
Atsushi Tatani, Tokyo, JP;
Makoto Susaki, Tokyo, JP;
Kazuaki Kimura, Tokyo, JP;
Taku Shimizu, Tokyo, JP;
Toshikuni Sera, Hiroshima-ken, JP;
Kenji Inoue, Hiroshima-ken, JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A gas refining method for adsorbing a reducing gas obtained by pressure gasification of coal or oil comprises introducing a reducing gas stream into an adsorbing and removing zone where it contacts an adsorbent. Sulfur-containing compounds are adsorbed onto the adsorbent and a first oxygen-containing gas stream is introduced into the adsorbing and removing zone in order to form a regeneration gas containing sulfur dioxide. The regeneration gas is contacted with a second oxygen-containing stream and a calcium-containing liquid slurry to effect absorption of sulfur dioxide by the slurry and precipitation of a gypsum compound. The temperature of the slurry is varied to cause selective precipitation of 60 -gypsum hemihydrate or gypsum dihydrate.