Claims
- 1. An exhaust gas cleaner comprising a heat-resistant, porous filter and a catalytic layer consisting of a uniform mixture of a catalyst and a ceramic carrier powder, said catalytic layer being formed on said filter from a solution consisting of an organic salt of ceramic carrier-constituting metal and a solution of a catalytic component metal salt by a sol-gel method, said catalyst consisting essentially of:
- (a) at least one of alkali metal elements;
- (b) copper and vanadium; and
- (c) at least one rare earth element,
- wherein the amount of said catalyst is 1-20 parts by weight and the amount of said ceramic carrier powder is 1-10 parts by weight, based on 100 parts by weight of said filter.
- 2. The exhaust gas cleaner according to claim 1, wherein the ceramic layer is made of TiO.sub.2.
- 3. The exhaust gas cleaner according to claim 1, wherein the amount of said catalyst is 5-15 parts by weight.
- 4. The exhaust gas cleaner according to claim 1, wherein the amount of said ceramic carrier powder is 2-6 parts by weight.
Priority Claims (2)
Number |
Date |
Country |
Kind |
2-270200 |
Oct 1990 |
JPX |
|
2-270201 |
Oct 1990 |
JPX |
|
Parent Case Info
This application is a division of application Ser. No. 07/773,113, filed on Oct. 8, 1991 now U.S. Pat. No. 5,213,781.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5141714 |
Obuchi et al. |
Aug 1992 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
773113 |
Oct 1991 |
|