# US 4,397,771 A · Oxidation catalysts

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- Number: US 4,397,771 A
- Document ID: US4397771A
- Status: Granted
- Kind: A
- Application number: 06/316,246
- Filed: 1981-10-29
- Granted: 1983-08-09
- Earliest claimed: 1975-01-13
- Assignees: The Standard Oil Company
- Inventors: Robert K. Grasselli; Dev D. Suresh
- Web page: https://patentgrep.com/patent/US4397771A

## CPC

- B01J 23/002: {Mixed oxides other than spinels, e.g. perovskite}
- B01J 23/30: Tungsten
- B01J 23/32: Manganese, technetium or rhenium
- B01J 23/686: {with molybdenum}
- B01J 23/88: Molybdenum
- B01J 27/192: with bismuth
- C07C 253/26: containing carbon-to-carbon multiple bonds, e.g. unsaturated aldehydes
- B01J 2523/00: Constitutive chemical elements of heterogeneous catalysts
- Y02P 20/52: using catalysts, e.g. selective catalysts
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The invention is an oxidation catalyst which contains at least a Group IIA or Group IIB element or manganese plus as required elements, chromium, bismuth and molybdenum. The catalysts can optionally contain a number of other elements and are useful for various oxidation reactions, especially the ammoxidation of propylene or isobutylene to obtain acrylonitrile or methacrylonitrile, the oxidation of propylene or isobutylene to obtain acrolein or methacrolein and the oxidative dehydrogenation of olefins containing 4 or 5 carbon atoms to obtain the corresponding diolefin.

## Claims

### Claim 1

An oxidation catalyst having the formula
A.sub.a C.sub.c D.sub.d Cr.sub.e Bi.sub.f Mo.sub.12 O.sub.x
wherein
A is an alkali metal Tl, Ag, Cu, Sn, W or mixtures thereof, wherein A contains at least alkali metal;
C is a Group IIA or Group IIB element, manganese or mixture thereof;
D is Ni, Co, P, As, Sb, Ge, B, or mixture thereof;
and wherein
a is 0-4;
c is 0.5 to 20;
d is 0-2;
e and f are 0.1-12, and
x is a number of oxygens required to satisfy the valence requirements of the other elements present.
said catalyst being free of indium, gallium, aluminum and rare earth metals.

### Claim 2 (depends on 1)

The oxidation catalyst of claim 1 wherein C is calcium, magnesium, manganese, cadmium, zinc or mixture thereof.

### Claim 3 (depends on 1)

The oxidation catalyst of claim 1 wherein A is potassium, copper, tin or mixture thereof and a is greater than zero.

### Claim 4 (depends on 1)

The catalyst of claim 1 wherein C is Mn.

### Claim 5 (depends on 1)

The catalyst of claim 1 wherein C is a Group IIB element, Mn or a mixture thereof.

### Claim 6 (depends on 1)

The catalyst of claim 1 wherein C is Mn.

### Claim 7

An oxidation catalyst having the formula
A.sub.a C.sub.c D.sub.d Cr.sub.e Bi.sub.f Mo.sub.12 O.sub.x
wherein
A is an alkali metal Tl, Ag, Cu, Sn, W, rare earth metal or mixtures thereof, wherein A contains at least alkali metal;
C is a Group IIB element;
D is Ni, Co, P, As, Sb, Ge, B, or mixture thereof;
and wherein
a is 0-4;
c is 0.5 to 20;
d is 0-2;
e and f are 0.1-12, and
x is the number of oxygens required to satisfy the valence requirements of the other elements present.