# US 4,400,572 A · Hydrocarbon conversion

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- Number: US 4,400,572 A
- Document ID: US4400572A
- Status: Granted
- Kind: A
- Application number: 06/326,027
- Filed: 1981-11-30
- Granted: 1983-08-23
- Earliest claimed: 1980-12-11
- Assignees: Imperial Chemical Industries PLC
- Inventors: Ivan J. S. Lake; Thomas V. Whittam
- Web page: https://patentgrep.com/patent/US4400572A

## CPC

- B01J 29/78: containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J 29/70: of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- C07C 5/2737: {with crystalline alumino-silicates, e.g. molecular sieves}
- B01J 2229/26: to stabilize the total catalyst structure
- B01J 2229/42: Addition of matrix or binder particles
- 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 process comprises isomerization, in the liquid or vapour phase, of a feed comprising a xylene or mixture of xylenes and optionally also containing up to 25% ethylbenzene using a catalyst comprising a novel crystalline aluminosilicate zeolite Nu-6(2).

## Claims

### Claim 1

A hydrocarbon conversion process which comprises contacting a feed of an alkylbenzene or a mixture of alkylbenzenes under isomerisation conditions in the vapour or liquid phase with a catalyst comprising zeolite Nu6-(2).

### Claim 2 (depends on 1)

A process as claimed in claim 1 in which zeolite Nu-6(2) is used in the form of a physical mixture with a diluent and/or binder.

### Claim 3 (depends on 1)

A process as claimed in claim 1 in which the process is carried out in the vapour phase under isomerisation conditions which include a temperature in the range 100.degree. to 600.degree. C. and a pressure in the range 0.5 to 50 Kg/cm.sup.2 absolute.

### Claim 4 (depends on 1)

A process as claimed in claim 1 in which the process is carried out in the liquid phase under isomerisation conditions which include a temperature in the range 0.degree. to 350.degree. C. and a pressure in the range 1 to 200 Kg/cm.sup.2.

### Claim 5 (depends on 1)

A process as claimed in claim 1 in which the isomerisation reaction is carried out in the presence of hydrogen.

### Claim 6 (depends on 5)

A process as claimed in claim 5 in which the mole ratio of hydrogen to alkylbenzene feed is in the range 1:1 to 30:1.

### Claim 7 (depends on 5)

A process as claimed in claim 5 in which the catalyst comprises a metal of Group VIII of the Periodic Table together with zeolite Nu-6(2).

### Claim 8 (depends on 7)

A process as claimed in claim 7 in which the amount of metal of Group VIII is in the range 0.1 to 2.0% by weight.

### Claim 9 (depends on 1)

A process as claimed in claim 1 in which the alkylbenzene is a xylene or a mixture of xylene isomers.

### Claim 10 (depends on 1)

A process as claimed in claim 1 in which the alkylbenzene feed contains up to 25% by weight of ethylbenzene.