Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2006-08-01
2006-08-01
Nguyen, Cam N. (Department: 1754)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S313000, C502S327000, C502S333000, C502S334000, C502S335000, C502S407000, C502S415000, C502S439000, C502S527190
Reexamination Certificate
active
07084091
ABSTRACT:
This invention provides a method for producing a ceramic catalyst body that can directly support a catalyst on a ceramic support without disposing a coating layer on the ceramic support. In the invention, a catalyst solution containing a catalyst component consisting of a negative complex ion resulting from a catalyst precursor is prepared, and a pH of the catalyst solution is adjusted in such a manner as to satisfy the relation E1>E2and E1>0 where E1is a surface potential of a matrix phase consisting of a cordierite-W composite body relative to the pH of the catalyst solution and E2is a surface potential of a dispersed phase consisting of compounds other than the cordierite-W composite body. After the ceramic support is brought into contact with the catalyst solution to support the catalyst component, heat-treatment is conducted to bond the matrix phase consisting of the cordierite-W composite body and the catalyst component to support the catalyst on the ceramic support.
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Office Action and English translation in corresponding Chinese application.
Hase Tomomi
Koike Kazuhiko
Nakanishi Tomohiko
Suzawa Takumi
Tanaka Masakazu
Nguyen Cam N.
Nippon Soken Inc.
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