# US 7,745,677 B2 · Aromatic isomerization catalyst and isomerization process

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- Number: US 7,745,677 B2
- Document ID: US7745677B2
- Status: Granted
- Kind: B2
- Application number: 12/608,367
- Filed: 2009-10-29
- Published: 2010-06-03
- Granted: 2010-06-29
- Earliest claimed: 2007-10-08
- Assignees: Uop LLC
- Inventors: Patrick C. Whitchurch; Paula L. Bogdan; John E. Bauer
- Web page: https://patentgrep.com/patent/US7745677B2

## CPC

- B01J 29/7469: {MTW-type, e.g. ZSM-12, NU-13, TPZ-12 or Theta-3}
- B01J 35/615: {100-500 m2/g}
- B01J 37/0009: {Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst}
- B01J 37/0072: {Preparation of particles, e.g. dispersion of droplets in an oil bath}
- B01J 37/06: Washing {(B01J37/0009, B01J37/0018 take precedence)}
- C07C 5/2754: {with metals}
- B01J 35/50: characterised by their shape or configuration
- B01J 35/55: Cylinders or rings
- B01J 2229/20: to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself
- B01J 2229/42: Addition of matrix or binder particles
- B01J 2235/00: Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- C07C 2521/04: Alumina
- C07C 2523/04: Alkali metals
- C07C 2529/74: Noble metals
- 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

One exemplary embodiment can be an extruded C8 alkylaromatic isomerization catalyst. The extruded catalyst can include: about 2-about 20%, by weight, of an MTW zeolite; about 80-about 98%, by weight, of a binder including an alumina; about 0.01-about 2.00%, by weight, of a noble group metal calculated on an elemental basis; and about 100 ppm-less than about 1000 ppm, by weight, of at least one alkali metal calculated on an elemental basis. Generally, the weight percents of the MTW zeolite, the binder, the noble group metal, and the at least one alkali metal are based on a weight of the extruded catalyst.

## Claims

### Claim 1

A process for isomerizing a non-equilibrium C8 aromatic feed to provide an isomerized product, comprising:
A) contacting the non-equilibrium C8 aromatic feed with an extruded C8 alkylaromatic isomerization catalyst, wherein the extruded catalyst comprises:
1) about 2-about 20%, by weight, of an MTW zeolite;
2) about 80-about 98%, by weight, of a binder comprising an alumina;
3) about 0.01-about 2.00%, by weight, of a noble group metal calculated on an elemental basis; and
4) about 100 ppm-less than about 1000 ppm, by weight, of at least one alkali metal calculated on an elemental basis;
wherein the weight percents of the MTW zeolite, the binder, the noble group metal, and at least one alkali metal are based on a weight of the extruded catalyst; and
B) providing the isomerized product having a C8 ring loss of no more than about 2.5.

### Claim 2 (depends on 1)

The process according to claim 1, wherein the isomerized product has a C8 ring loss of about 2.0-about 2.5.

### Claim 3 (depends on 1)

The process according to claim 1, wherein the at least one alkali metal comprises sodium and the extruded catalyst comprises at least about 150 ppm, by weight, of sodium calculated on an elemental basis based on the weight of the extruded catalyst.

### Claim 4 (depends on 1)

The process according to claim 1, wherein the at least one alkali metal comprises potassium and the extruded catalyst comprises at least about 50 ppm, by weight, of potassium calculated on an elemental basis based on the weight of the extruded catalyst.

### Claim 5 (depends on 1)

The process according to claim 1, wherein the extruded catalyst comprises:
about 5-about 10%, by weight, of the MTW zeolite; and
about 90-about 95%, by weight, of the binder;
wherein the weight percents of the MTW zeolite and the binder are based on the weight of the extruded catalyst.