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. 03, 2008
Filed:
Aug. 06, 2003
Masahiro Harada, Minato-ku, JP;
Shintaro Honjo, Hiroshima, JP;
Makoto Susaki, Minato-ku, JP;
Kazuo Ishida, Minato-ku, JP;
Hajime Nagano, Minato-ku, JP;
Susumu Okino, Hiroshima, JP;
Masahiro Harada, Minato-ku, JP;
Shintaro Honjo, Hiroshima, JP;
Makoto Susaki, Minato-ku, JP;
Kazuo Ishida, Minato-ku, JP;
Hajime Nagano, Minato-ku, JP;
Susumu Okino, Hiroshima, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A wet gas purification method is provided for removing ammonia from a heavy oil gasification gas, such as coal. The method principally involves a washing step during which absorbent is charged into the gas to absorb ammonia and an ammonia treating step wherein absorbent discharged from the washing step is separated into an effluent and an off-gas containing ammonia. The amount of absorbent charged during the washing step is controlled such that the ammonia concentration of gas exiting the washing step is 10 ppm or less.