Claims
- 1. A process for the ammoxidation of a C.sub.3 to C.sub.5 paraffin to an .alpha.,.beta.-unsaturated mononitrile which comprises contacting in a reaction zone said paraffin in the vapor phase in admixture with ammonia, molecular oxygen, and optionally an inert gaseous diluent, with an intimate particulate mixture of a first catalyst composition and a second catalyst composition, said feed to the reaction zone containing a mole ratio of paraffin:NH.sub.3 in the range from 2 to 16, and a mole ratio of paraffin:O.sub.2 in the range from 1 to 10 said first catalyst composition being 0-99 weight percent of a diluent/support and 100-1 weight percent of a catalyst having oxygen and the cation components in the proportions indicated by the empirical formula:
- Bi.sub.a V.sub.b L.sub.l M.sub.m T.sub.t O.sub.x, formula (1)
- wherein
- L is one or more of K, Cs, Rb and Tl;
- M is one or more of Mo, W, Cr, Ge, Sb, Sn, P, Pb and B;
- T is one or more of Zn, Nb, Ta, Fe, Co, Ni Cu, Mn, Ti and rare earths,
- a=1-25
- b=1-50
- l=0-1
- m=0.1-20
- t=0-20
- x is determined by the oxidation state of the other elements in the catalyst,
- (a+b):(l+m+t)=20:1 to 1:5
- a:b=1:5-5:1
- with the proviso that the atomic ratio of Mo:V is zero to <10; said second catalyst composition being 0-99 weight percent of a diluent/support and 100-1 weight percent of a catalyst having oxygen and the cation components in the proportions indicated by the empirical formula:
- Bi.sub.n Ce.sub.p D.sub.d E.sub.e F.sub.f Mo.sub.12 W.sub.g V.sub.v O.sub.yformula ( 2)
- where
- D is one or more of Fe, Mn, Pb, Co, Ni, Cu, Sn, P, Cr, Y, Mg, Ca, Sr, Ba and rare earths other than Ce and Sm;
- E is one or more of Sb, Ge, As, Se, and Te;
- F is one or more of an alkali metal, Tl, Ag and Sm and where n is 0.01-24, p is 0.01-24; (n+p) is 0.1-24, d is 0-10, e is 0-10, f is 0-6, g is 0-8, v is 0-0.5 and y is determined by the oxidation state of the other elements present, wherein the weight ratio in said mixture of said first catalyst composition to said second catalyst composition is in the range of 0.001 to 2.5.
- 2. A process of claim 1 wherein said mole ratio of paraffin:NH.sub.3 is in the range from 3 to 7.
- 3. A process of claim 1 wherein said mole ratio of paraffins:O.sub.2 is in the range from 1.5 to 5.
- 4. A process of claim 2 wherein said mole ratio of paraffin:O.sub.2 is in the range from 1.5 to 5.
- 5. A process according to claim 1 wherein the mole ratio of O.sub.2 to NH.sub.3 in the feed to the reaction zone is in the range from 1 to 10.
- 6. A process according to claim 1 wherein the mole ratio of inert gaseous diluent to paraffin in the feed to the reaction zone is in the range from zero to 5.
- 7. A process of claim 1 wherein said paraffin is propane or isobutane.
- 8. A process of claim 1 wherein said paraffin is propane.
- 9. A process of claim 2 wherein said paraffin is propane or isobutane.
- 10. A process of claim 4 wherein said paraffin is propane.
Parent Case Info
This a division of co-pending application Ser. No. 200,325, pending, filed May 31, 1988
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4801568 |
Brazdil, Jr. et al. |
Jan 1989 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
200325 |
May 1988 |
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