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. 23, 2006
Filed:
Nov. 26, 2003
In-sik Nam, Pohang, KR;
Sung Dae Yim, Daegu, KR;
Joon Hyun Baik, Pohang, KR;
SE Hyuck OH, Troy, MI (US);
Byong Kwon Cho, Rochester Hills, MI (US);
In-Sik Nam, Pohang, KR;
Sung Dae Yim, Daegu, KR;
Joon Hyun Baik, Pohang, KR;
Se Hyuck Oh, Troy, MI (US);
Byong Kwon Cho, Rochester Hills, MI (US);
General Motors Corporation, Detroit, MI (US);
Pohang University of Science and Technology, Pohang, KR;
Abstract
A zeolite catalyst and a process for preparing a zeolite catalyst which is both capable of catalyzing the removal of nitrogen oxides from a gaseous medium across a broad temperature range and is operationally and hydrothermally stable at high reaction temperatures. The zeolite catalyst includes a zeolite carrier having a mole ratio of typically from about 14 to about 95 and copper ions supported on the zeolite carrier. The zeolite catalyst is prepared by providing a zeolite carrier, reacting copper with the zeolite carrier by carrying out an ion exchange reaction in a cupric salt aqueous solution at a temperature of between about 4° C. and room temperature (25° C.), and then drying and calcining the catalyst.