Claims
- 1. A catalyst composition having the empirical formula:
- A.sub.a V.sub.b D.sub.c O.sub.x
- wherein
- A is at least one element selected from the group consisting of potassium and arsenic; and
- D is at least one element selected from the group consisting of niobium, tantalum and tungsten;
- and wherein
- a is a positive number less than or equal to 5;
- b and c are 0.1 to 10; and
- x is the number as determined by the combined valence requirements of elements other than oxygen present in the catalyst.
- 2. The catalyst of claim 1 wherein A is potassium.
- 3. The catalyst of claim 1 wherein A is arsenic.
- 4. The catalyst of claim 1 wherein D is niobium.
- 5. The catalyst of claim 1 wherein D is tantalum.
- 6. The catalyst of claim 1 wherein D is tungsten.
- 7. A catalyst composition having the empirical formula:
- A.sub.a V.sub.b D.sub.c O.sub.x
- wherein
- A is zinc and potassium;
- D is at least one element selected from the group consisting of niobium, tantalum and tungsten;
- and wherein
- a is a positive number less than or equal to 5;
- b and c are 0.1 to 10; and
- x is a number as determined by the combined valence requirements of the elements other than oxygen present in the catalyst.
- 8. A catalyst of claim 7 having the empirical formula K.sub.0.02 Zn.sub.0.2 V.sub.1.0 Nb.sub.1.2 Ox.
- 9. A catalyst composition having the empirical formula
- Zn.sub.a V.sub.b Nb.sub.c O.sub.x
- and wherein
- a is a positive number less than or equal to 5;
- b and c are 0.1 to 10; and
- x is a number as determined by the combined valence requirements of the elements other than oxygen present in the catalyst.
- 10. The catalyst of claim 9 having the empirical formula Zn.sub.0.2 V.sub.1.0 Nb.sub.1.2 Ox.
REFERENCE TO RELATED APPLICATIONS
This is a continuation of Ser. No. 891,786 filed Mar. 30, 1978 and now U.S. Pat. No. 4,234,461, which is a continuation-in-part of our earlier application Ser. No. 778,658, filed Mar. 17, 1977 now abandoned, which is a divisional of Ser. No. 602,343, filed Aug. 6, 1975, now U.S. Pat. No. 4,052,418, issued Oct. 4, 1977.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3704317 |
Yamashita |
Nov 1972 |
|
3907919 |
Lo et al. |
Sep 1975 |
|
4010238 |
Shiraishi et al. |
Mar 1977 |
|
4075231 |
Dolhyj et al. |
Feb 1978 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
602343 |
Aug 1975 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
891786 |
Mar 1978 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
778658 |
Mar 1977 |
|