Claims
- 1. A catalyst suitable for the vapor-phase oxidation of methacrolein to methacrylic acid consisting essentially of the composition expressed by the formula:
- Mo.sub.12 Cu.sub.a P.sub.b Sb.sub.c A.sub.d B.sub.e O.sub.x
- where: a=0.05-3; b=0.1-5; c=0.01-3; d=0.1-3; e=0.01-3; and x=a value determined by the valence and proportions of the other elements of the formula, where A is Cs and/or Ca and B is one more elements selected from the group consisting Ni, Zn, Ru, Rh, Pd, Pt, As, K, Rb, Sr, Ba, Cr, V, Nb, W, Mn, Re, and rare earth metals including La.
- 2. A catalyst of claim 1 wherein b=1-2.
- 3. A catalyst of claim 2 wherein b=1.2-1.8.
- 4. A catalyst of claim 1 wherein A is Cs.
- 5. A catalyst of claim 4 wherein b=1.2-1.8.
- 6. A catalyst of claim 5 wherein b=1.3-1.7.
- 7. A catalyst of claim 1 where A is Ca.
- 8. A catalyst of claim 7 wherein b=1-2.
- 9. A catalyst of claim 8 wherein b=1.2-1.8.
- 10. A catalyst suitable for the vapor-phase oxidation of methacrolein to methacrylic acid consisting essentially of the composition expressed by the formula:
- Mo.sub.12 Cu.sub.a P.sub.b Sb.sub.c Cs.sub.d O.sub.x
- where: a=0.05-3; b=1-2; c=0.01-3; d=0.1-3; and x=a value determined by the valence and proportions of the other elements of the formula.
- 11. A catalyst of claim 10 wherein b=1.2-1.8.
- 12. A catalyst of claim 11 wherein b=1.3-1.7.
- 13. A catalyst suitable for the vapor-phase oxidation of methacrolein to methacrylic acid consisting essentially of the composition expressed y the formula:
- Mo.sub.12 Cu.sub.a P.sub.b Sb.sub.c Ca.sub.d O.sub.x
- where: a=0.05-3; b=1-2; c=0.01-3; d=0.1-3; and x=a value determined by the valence and proportions of the other elements of the formula.
- 14. A catalyst suitable for the vapor-phase oxidation of methacrolein to methacrylic acid consisting essentially of the composition expressed by the formula:
- Mo.sub.12 Cu.sub.a P.sub.b Sb.sub.c Cs.sub.d Re.sub.e O.sub.x
- where: a=0.05-3; b=1-2; c=0.01-3; d=0.1-3; e=0.005-0.5; and x=a value determined by the valence and proportions of the other elements of the formula.
- 15. A catalyst of claim 14 wherein b=1.2-1.8.
- 16. A catalyst of claim 15 wherein b=1.3-1.7.
- 17. A catalyst suitable for the vapor-phase oxidation of methacrolein to methacrylic acid consisting essentially of the composition expressed by the formula:
- Mo.sub.12 Cu.sub.a P.sub.b Sb.sub.c Ca.sub.d Re.sub.e O.sub.x
- where: a=0.05-3; b=1-2; c=0.01-3; d=0.1-3; e=0.005-0.5; and x=a value determined by the valence and proportions of the other elements of the formula.
- 18. A catalyst suitable for the vapor-phase oxidation of methacrolein to methacrylic acid consisting essentially of the composition expressed by the formula:
- Mo.sub.12 Cu.sub.a P.sub.b Sb.sub.c Ca.sub.d W.sub.e O.sub.x
- where: a=0.05-3; b=1-2; c=0.01-3; d=0.1-3; e=0.01-3; and x=a value determined by the valence and proportions of the other elements of the formula.
- 19. The catalyst of claim 18 further comprising arsenic.
CROSS-REFERENCE TO OTHER APPLICATIONS
This is a continuation-in-part of U.S. Ser. Nos. 973,354, 972,745, 972,743 and 973,495, all filed Dec. 26, 1978, 027,632, 027,633, 027,634, and 027,635, all filed Apr. 6, 1979, and U.S. Ser. No. 047,860 filed June 12, 1979.
US Referenced Citations (6)
Related Publications (8)
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Number |
Date |
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972745 |
Dec 1978 |
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972743 |
Dec 1978 |
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973495 |
Dec 1978 |
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27632 |
Apr 1979 |
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27633 |
Apr 1979 |
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27634 |
Apr 1979 |
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27635 |
Apr 1979 |
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47860 |
Jun 1979 |
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Continuation in Parts (1)
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Number |
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Parent |
973354 |
Dec 1978 |
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