IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0420320
(2003-04-22)
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발명자
/ 주소 |
- Gaffney, Anne Mae
- Han, Scott
- Heffner, Michelle Doreen
- McNeal, Nneka Namono
- Vickery, Elsie Mae
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
4 인용 특허 :
6 |
초록
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A supported catalyst comprising a mixed metal oxide is useful for the vapor phase catalytic partial oxidation of an alkane, or a mixture of an alkane and an alkene, to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane, or a mixture of an alkane and an alkene, to an uns
A supported catalyst comprising a mixed metal oxide is useful for the vapor phase catalytic partial oxidation of an alkane, or a mixture of an alkane and an alkene, to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane, or a mixture of an alkane and an alkene, to an unsaturated nitrile.
대표청구항
▼
1. A process for improving the performance characteristics of a catalyst, said process comprising:a) providing precursors for a mixed metal oxide catalyst having the empirical formula MoaVbEcXdOe ?wherein E is at least one element selected from the group consisting of Te and Sb; X is at least one el
1. A process for improving the performance characteristics of a catalyst, said process comprising:a) providing precursors for a mixed metal oxide catalyst having the empirical formula MoaVbEcXdOe ?wherein E is at least one element selected from the group consisting of Te and Sb; X is at least one element selected from the group consisting of Nb, Ta, W, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Bi, B, In, Ce, Se, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Hf, Ag, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu; ?and, when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0 and e is dependent on the oxidation state of the other elements; b) calcining an admixture of said precursors to form said mixed metal oxide catalyst; and c) forming said mixed metal oxide catalyst into a catalyst structure by at least one technique selected from the group consisting of (1) contacting said catalyst with a pre-formed and self-supporting, multidimensional structure, (2) forming a composition comprising said catalyst into a self-supporting, multidimensional structure and (3) admixing said catalyst with a support selected from the group consisting of alumina, Nb2O5, cordierite, partially stabilized zirconia and alumina/silica fiber. 2. The process of claim 1, wherein X is at least one element selected from the group consisting of Nb, Ta, W, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Ag, Bi, B, In and Ce.3. The process of claim 2, wherein, when a=1, b=0.1 to 0.5, c=0.005 to 0.5 and d=0.01 to 0.5.4. The process of claim 1, wherein said pre-formed and self-supporting, multidimensional structure comprises a ceramic foam, a ceramic monolith or a ceramic fabric.5. The process according to claim 1, wherein said pre-formed and self-supporting, multidimensional structure comprises a stack of a plurality of layers joined together by a thermally conductive connection.6. The process according to claim 1, wherein said technique of (1) contacting said catalyst with a pre-formed and self-supporting, multidimensional structure comprises an incipient wetness technique.7. The process according to claim 1, wherein said technique of (2) forming a composition comprising said catalyst into a self-supporting, multidimensional structure comprises forming a composition comprising said catalyst into a ceramic foam, a ceramic monolith or a ceramic fabric.8. The process according to claim 1, wherein said technique of (3) admixing said catalyst with a support selected from the group consisting of alumina, Nb2O5, cordierite, partially stabilized zirconia and alumina/silica fiber comprises physically mixing, wetting, precipitating, co-precipitating, chemically depositing, vapor depositing or a combination thereof.
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