IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0731523
(2003-12-09)
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발명자
/ 주소 |
- Gaffney, Anne Mae
- Heffner, Michele Doreen
- Song, Ruozhi
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
5 인용 특허 :
5 |
초록
▼
An improved catalyst comprising a mixed metal oxide, either promoted or not, is useful for the vapor phase 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
An improved catalyst comprising a mixed metal oxide, either promoted or not, is useful for the vapor phase 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, comprising the steps of:a) providing precursors for a mixed metal oxide having the empirical formula JjMmNn; YyZzOo wherein J is at least one element selected from the group consisting of Mo and W, M is at least one element se
1. A process for improving the performance characteristics of a catalyst, comprising the steps of:a) providing precursors for a mixed metal oxide having the empirical formula JjMmNn; YyZzOo wherein J is at least one element selected from the group consisting of Mo and W, M is at least one element selected from the group consisting of V and Ce, N is at least one element selected from the group consisting of Te, Sb and Se, Y is at least one element selected from the group consisting of Nb, Ta, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Sb, Bi, B, In, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Hf, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, and Z is selected from the group consisting of Ni, Pd, Cu, Ag and Au; and wherein, when j=1, m=0.01 to 1.0, n=0.01 to 1.0, y=0.01 to 1.0, z=0.001 to 0.1 and o is dependent on the oxidation state of the other elements;b) adding a source of NOx to said precursors to form an admixture; and c) calcining said admixture while said NOx is present in said admixture. 2. The process according to claim 1, wherein said source of NOx is selected from nitric acid, ammonium nitrate, ammonium nitrite, NO, NO2 or a mixture thereof.3. The process according to claim 1, wherein said source of NOx is nitric acid.4. The process according to claim 1, wherein said providing step (a) includes forming an admixture of metal compounds, at least one of which contains oxygen, in at least one solvent.5. The process according to claim 1, wherein said adding step (b) includes adding said source of NOx in a gaseous state.
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