Claims
- 1. A process for the preparation of acrylic acid which comprises reacting acrolein with molecular oxygen in the vapor phase in the presence of an oxidation catalyst composition having the following empirical formula
- Mo.sub.a P.sub.b V.sub.c L.sub.d M.sub.e O.sub.f
- wherein L is at least one element selected from the group consisting of Rb, Cs and K; M is at least one element selected from the group consisting of Sr, Nb, Cd, B, Zn and Pb; and a, b, c, d, e and f each represent the number of atoms of each element; the atomic ratio of a:b:c:d:e being 12:0.1-8:0.1-8:0.1-8:0-6; and f being the number of oxygen atoms determined by the valence requirements of the other elements present.
- 2. The process of claim 1, which comprises carrying out the reaction at a temperature of 300.degree. to 500.degree. C.
- 3. The process of claim 1 wherein the source of said molecular oxygen is air.
- 4. The process of claim 1 wherein an inert diluent gas is introduced into the reaction zone.
- 5. The process of claim 1 wherein the catalyst is diluted with an inert diluent or supported on an inert carrier.
- 6. The process of claim 1 wherein the atomic ratio of a:b:c:d:e is 12:0.3-5:0.3-5:0.3-5:0-3.
- 7. The process of claim 1 wherein the atomic ratio of a:b:c:d:e is 12:0.3-5:0.3-5:0.3-5:0.05-3.
- 8. The process of claim 1 wherein L is Rb.
- 9. The process of claim 1 wherein L is Cs.
- 10. The process of claim 1 wherein L is K.
- 11. A process for the preparation of acrylic acid which comprises reacting acrolein with molecular oxygen in the vapor phase in the presence of an oxidation catalyst composition having the following empirical formula
- Mo.sub.a P.sub.b V.sub.c L.sub.d M.sub.e O.sub.f
- wherein L is at least one element selected from the group consisting of Rb, Cs and K; M is at least one element selected from the group consisting of Sr, Zn and Cd; and a, b, c, d, e and f each represent the number of atoms of each element; the atomic ratio of a:b:c:d:e being 12:0.3-5:0.3-5:0.3-5:0.05-3; and f being the number of oxygen atoms determined by the valence requirements of the other elements present.
- 12. The process of claim 11 wherein M is Sr.
- 13. The process of claim 11 wherein M is Zn.
- 14. The process of claim 11 wherein M is Cd.
Priority Claims (1)
Number |
Date |
Country |
Kind |
49-85763 |
Jul 1974 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 597,163, filed July 18, 1975, now abandoned.
US Referenced Citations (5)
Continuations (1)
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Number |
Date |
Country |
Parent |
597163 |
Jul 1975 |
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