Claims
- 1. A complex metal oxide catalyst, which is essentially free of bismuth, having the elements and the proportions which are represented by the following empirical formula:
- VSb.sub.m A.sub.a B.sub.b C.sub.c O.sub.x,
- where
- A is one or more of W, Sn, B, Mo and Ge and includes at least 0.2 atoms of W per atom of V;
- B is one or more of Fe, Co, Ni, Cr, Mn, Zn, Se, Te and As;
- C is one or more of an alkali metal, Ca, Sr, Ba, Tl
- and where m is greater than 1 and up to 20; a is 0.4-10; b is 0-5; c is 0-1; a is equal to or less than m; b is equal to or less than m; wherein x is determined by the oxidation state of the other elements present, and wherein the antimony has an average valency higher than +3 and the vanadium has an average valency lower than +5, wherein crystalline Sb.sub.2 O.sub.4 is present in said catalyst, and wherein the foregoing catalyst is on an inorganic oxide support material selected from alumina and silica-alumina which is 50 to 100 weight percent alumina.
- 2. A catalyst of claim 1 wherein m is 2-10.
- 3. A catalyst of claim 1 wherein m is 3-7.
- 4. A catalyst of claim 1 wherein A includes at least 0.2 atoms of W per atom of V and the total A atoms include at least 0.4 (W atoms +Sn atoms) per atom of V.
- 5. A catalyst of claim 4 wherein b is at least 0.2.
Parent Case Info
This application is a continuation-in-part of parent application Ser. No. 643,208 filed Aug. 22, 1984, now abandoned.
US Referenced Citations (33)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0896536 |
Mar 1972 |
CAX |
2124639 |
Dec 1971 |
DEX |
46-3459 |
Jan 1971 |
JPX |
1176233 |
Jan 1970 |
GBX |
0189771 |
Mar 1967 |
SUX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
643208 |
Aug 1984 |
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