# US 4,396,540 A · Hydrocarbon dehydrogenation with a multimetallic catalytic composite

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- Number: US 4,396,540 A
- Document ID: US4396540A
- Status: Granted
- Kind: A
- Application number: 06/301,065
- Filed: 1983-09-11
- Granted: 1983-08-02
- Earliest claimed: 1977-11-04
- Assignees: Uop LLC
- Inventors: George J. Antos
- Web page: https://patentgrep.com/patent/US4396540A

## CPC

- C10G 35/09: Bimetallic catalysts in which at least one of the metals is a platinum group metal
- B01J 23/46: Ruthenium, rhodium, osmium or iridium
- B01J 23/6567: {Rhenium}
- C07C 5/3337: {of the platinum group}
- C07C 5/367: Formation of an aromatic six-membered ring from an existing six-membered ring, e.g. dehydrogenation of ethylcyclohexane to ethylbenzene
- C07C 2523/02: of the alkali- or alkaline earth metals or beryllium
- C07C 2523/04: Alkali metals
- C07C 2523/36: Rhenium
- C07C 2523/46: Ruthenium, rhodium, osmium or iridium
- C07C 2523/656: Manganese, technetium or rhenium
- Y02P 20/52: using catalysts, e.g. selective catalysts
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- 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

Dehydrogenatable hydrocarbons are dehydrogenated by contacting them at hydrocarbon dehydrogenation conditions with a multimetallic catalytic composite comprising a combination of a catalytically effective amount of a pyrolyzed ruthenium carbonyl component with a porous carrier material containing a uniform dispersion of catalytically effective amounts of a platinum group component maintained in the elemental metallic state, and of a rhenium component. An optional non-acidic multimetallic catalytic composite disclosed herein is a combination of a catalytically effective amount of a pyrolyzed ruthenium carbonyl component with a porous carrier material containing a uniform dispersion of catalytically effective amounts of a platinum group component which is maintained in the elemental metallic state during the incorporation of the ruthenium carbonyl component, a rhenium component, and an alkali or alkaline earth component.

## Claims

### Claim 1

A nonacidic catalytic composite comprising a combination of a catalytically effective amount of a pyrolyzed ruthenium carbonyl component with a porous carrier material containing a uniform dispersion of catalytically effective amounts of a platinum group component which is maintained in the elemental metallic state during the incorporation and pyrolysis of the ruthenium carbonyl component, a rhenium component, and an alkali or alkaline earth component.

### Claim 2 (depends on 1)

A nonacidic catalytic composite as defined in claim 1 wherein the composite contains the components in amounts, calculated on an elemental basis, corresponding to about 0.01 to about 2 wt. % ruthenium, about 0.01 to about 2 wt. % platinum group metal, about 0.01 to about 5 wt. % rhenium, and about 0.1 to about 5 wt. % alkali or alkaline earth metal.

### Claim 3 (depends on 1)

A nonacidic catalyst composite as defined in claim 1 wherein the porous carrier material is a refractory inorganic oxide.

### Claim 4 (depends on 3)

A nonacidic catalyst composite as defined in claim 3 wherein the refractory inorganic oxide is alumina.

### Claim 5 (depends on 1)

A nonacidic catalyst composite as defined in claim 1 wherein the platinum group component is platinum.

### Claim 6 (depends on 1)

A nonacidic catalyst composite as defined in claim 1 wherein the platinum group component is palladium.

### Claim 7

A nonacidic catalyst composite as defined in calim 1 wherein the platinum group component is rhodium.

### Claim 8 (depends on 1)

A nonacidic catalyst composite as defined in claim 1 wherein the platinum group component is iridium.

### Claim 9 (depends on 1)

A nonacidic catalyst composite as defined in claim 1 wherein the alkali or alkaline earth component is potassium.

### Claim 10 (depends on 1)

A nonacidic catalytic composite as defined in claim 1 wherein the alkali or alkaline earth component is lithium.

### Claim 11 (depends on 1)

A nonacidic catalyst composite as defined in claim 1 wherein the catalytic composite is in a substantially halogen free state.

### Claim 12 (depends on 1)

A nonacidic catalyst composite as defined in claim 1 wherein the composite contains, on an elemental basis, about 0.05 to about 1 wt. % ruthenium, about 0.05 to about 1 wt. % platinum group metal, about 0.05 to about 1 wt. % rhenium and about 0.25 to about 3.5 wt. % alkali metal or alkaline earth metal.

### Claim 13 (depends on 1)

A nonacidic catalytic composite as defined in claim 1 wherein the metals contents thereof is adjusted so that the atomic ratio of rhenium to platinum group metal is about 0.1:1 to about 10:1, the atomic ratio of alkali or alkaline earth metal to platinum group metal is about 5:1 to about 100:1 and the atomic ratio of ruthenium, derived from the ruthenium carbonyl component, to platinum group metal is about 0.1:1 to about 5:1.