IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0702249
(1996-08-28)
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우선권정보 |
KR-0028862 (1995-09-05) |
발명자
/ 주소 |
- Park Sang Un (Taejun KRX) Lee Sang Ho (Taejun KRX) Kim Kyung Mi (Taejun KRX) Jang Jong San (Taejun KRX) Lee Jong Hae (Seoul KRX)
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출원인 / 주소 |
- Korea Research Institute of Chemical Technology (Taejun KRX 03)
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인용정보 |
피인용 횟수 :
15 인용 특허 :
5 |
초록
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The amorphous perovskite structure catalysts according to the present invention comprise a carrier material and a mixture of at least two metal oxides supported thereon, which have the following formula: (M1aOx.M21-aOy)(M3bOz.M41-bOw)/S wherein M1 and M2 independently of each other are selected from
The amorphous perovskite structure catalysts according to the present invention comprise a carrier material and a mixture of at least two metal oxides supported thereon, which have the following formula: (M1aOx.M21-aOy)(M3bOz.M41-bOw)/S wherein M1 and M2 independently of each other are selected from the group consisting of the lanthanide metals, the alkali metals and the alkaline earth metals, M3 and M4 independently of each other are selected from the group consisting of the transition metals and the platinum metals, a and b are from 0 to 1, x, y, z and w are determined stoichiometrically on the values of a and b, the ratio of [M1+M2]to [M3+M4]is 0.1_3.0:1.0, and S is a carrier material. The process for preparing the amorphous perovskite structure catalysts comprises dissolving completely at least two salt solutions of metals, M1, M2, M3 and M4, and an acid in an organic acid, preparing an ester type resin intermediate by adding a hydroxy alcohol to the solution, mixing the solution in a liquid state by adding a powder type carrier material, distilling the mixed solution under a reduced pressure so as to concentrate the solution into a high viscous state, drying the concentrated solution using a microwave into a gel type catalyst precursor, and calcining the precursor stepwise at the temperatures of 300°_700°C. The process can provide amorphous perovskite structure catalysts having a high specific surface area and a good dispersion for denitrizing nitrogen oxides.
대표청구항
▼
A process of preparing an amorphous perovskite structure catalyst that is represented by the following formula: (M1aOx.M21-aOy)(M3bOz.M41-bOw)/Sup wherein M1 and M2, independently of each other, are selected from the group consisting of the lanthanide metals, the alkali metals, and the alkaline eart
A process of preparing an amorphous perovskite structure catalyst that is represented by the following formula: (M1aOx.M21-aOy)(M3bOz.M41-bOw)/Sup wherein M1 and M2, independently of each other, are selected from the group consisting of the lanthanide metals, the alkali metals, and the alkaline earth metals, M3 and M4, independently of each other, are selected from the group consisting of the transition metals and the platinum metals, a and b are from 0 to 1, x, y, z and w are determined stoichiometrically on the values of a and b, the ratio of [M1+M2]to [M3+M4]is 0.1_3.0:1.0, and Sup is a carrier material, said process comprising the steps of: dissolving completely at least two metal salt solutions of metals, M1, M2, M3 and M4, and an acid in an organic acid; preparing a resin intermediate having an ester group by adding a hydroxy alcohol to the solution; mixing the solution while adding a carrier material; distilling the mixed solution at a pressure below 1.0 atmosphere so as to concentrate the solution; drying the concentrated solution using a microwave into a gel catalyst precursor; and calcining the precursor stepwise at a temperature of 300°_700°C.
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