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:
Oct. 07, 2008
Filed:
Apr. 14, 2004
Yong-woo Kim, Daejeon, KR;
Joon-seok Min, Daejeon, KR;
Sung-hyoan Kim, Daejeon, KR;
Chang-q Lee, Daejeon, KR;
Wha-sik Min, Daejeon, KR;
Yong-Woo Kim, Daejeon, KR;
Joon-Seok Min, Daejeon, KR;
Sung-Hyoan Kim, Daejeon, KR;
Chang-Q Lee, Daejeon, KR;
Wha-Sik Min, Daejeon, KR;
SK Energy Co., Ltd., Seoul, KR;
Abstract
Disclosed is a catalytic filter for removing soot particulates from diesel engine exhaust, which is comprised of monolithic oxidation catalyst upstream of the catalytic filter, which effectively oxidize gaseous pollutants and volatile organic fractions, and a catalyzed wall-flow filter downstream serving to low temperature combustion of soot particulates collected on the filter. Also, the preparation method of the catalytic filter is provided, including the colloidal mixture solution of platinum group metal salts and other metal salts with a water-soluble polymer and a reducing agent, which is then impregnated on a catalyst support, followed by calcining at high temperatures. In the present invention, use of the catalytic filter provides effective means of abating diesel exhaust pollutant emissions, that is, particulate matter (PM) and gaseous pollutants (HC, CO, NOx).