IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0646363
(1991-01-28)
|
우선권정보 |
JP-0305429 (1990-11-09) |
발명자
/ 주소 |
- Abe Fumio (Handa JPX) Suzuki Junichi (Kuwana JPX) Noda Naomi (Ichinomiya JPX)
|
출원인 / 주소 |
- NGK Insulators, Ltd. (JPX 03)
|
인용정보 |
피인용 횟수 :
31 인용 특허 :
0 |
초록
▼
A catalyst composition for purification of exhaust gas, including (a) high-silica zeolite having a Si/Al ratio of 40 or more, subjected to ion exchange with at least one metal selected from Pt, Pd, Rh, Ir and Ru, and (b) a heat-resistant oxide containing at least one metal selected from Pt, Pd, Rh,
A catalyst composition for purification of exhaust gas, including (a) high-silica zeolite having a Si/Al ratio of 40 or more, subjected to ion exchange with at least one metal selected from Pt, Pd, Rh, Ir and Ru, and (b) a heat-resistant oxide containing at least one metal selected from Pt, Pd, Rh, Ir and Ru; a catalyst for purification of exhaust gas, including a monolith carrier and the catalyst composition supported on the carrier; and a process for producing the catalyst. The catalyst has high activity for exhaust gas purification even when the catalyst contains Rh--, --, which is an expensive catalyst component, in a very small amount.
대표청구항
▼
A catalyst for purification of exhaust gas, comprising: (a) high-silica zeolite having a Si/Al ratio of 40 or more, subjected to ion exchange with at least one metal selected from Pt, Pd, Rh, Ir and Ru; (b) a heat-resistant oxide comprising (i) at least one oxide selected from the group consisting o
A catalyst for purification of exhaust gas, comprising: (a) high-silica zeolite having a Si/Al ratio of 40 or more, subjected to ion exchange with at least one metal selected from Pt, Pd, Rh, Ir and Ru; (b) a heat-resistant oxide comprising (i) at least one oxide selected from the group consisting of Al2O3, TiO2, ZrO2, SiO2, their compound oxides and mixtures of said oxide with a rare earth element compound oxide and/or an alkaline earth metal compound oxide, and (ii) at least one metal selected from the group consisting of Pt, Pd, Rh, Ir and Ru; and (c) a monolith carrier supporting the components (a) and
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