IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0116241
(2002-04-04)
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발명자
/ 주소 |
- Gaffney, Anne Mae
- Heffner, Michele Doreen
- Song, Ruozhi
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출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
5 |
초록
A catalyst comprising a mixed metal oxide 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 characterisitics of a catalyst, comprising the steps of:a) providing precursors for a mixed metal oxide having the empirical formula A a D b E c X d O e , wherein A is at least one element selected from the group consisting of Mo and W, D is at least o
1. A process for improving the performance characterisitics of a catalyst, comprising the steps of:a) providing precursors for a mixed metal oxide having the empirical formula A a D b E c X d O e , wherein A is at least one element selected from the group consisting of Mo and W, D is at least one element selected from the group consisting of V and Ce, E is at least one element selected from the group consisting of Te, Sb and Se, and X 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, Hf, Ag, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu; and 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 said other elements;b) adding a source of NO x to said precursors to form an admixture; andc) calcining said admixture while said NO x is present in said admixture. 2. The process according to claim 1, wherein said source of NO x is selected from nitric acid, ammonium nitrate, ammonium nitrite, NO, NO 2 or a mixture thereof. 3. The process according to claim 1, wherein said source of NO x 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 NO x in a gaseous state.
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