# US 7,745,678 B2 · Alkyl aromatic isomerization process using a catalyst comprising a UZM-8HS composition

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,745,678 B2
- Document ID: US7745678B2
- Status: Granted
- Kind: B2
- Application number: 12/613,896
- Filed: 2009-11-06
- Published: 2010-03-04
- Granted: 2010-06-29
- Earliest claimed: 2003-03-21
- Assignees: Uop LLC
- Inventors: Deng-Yang Jan; Mathias P. Koljack; John E. Bauer; Paula L. Bogdan; Gregory J. Lewis; Susan C. Koster; Michael G. Gatter; Jaime G. Moscoso
- Web page: https://patentgrep.com/patent/US7745678B2

## CPC

- B01J 29/06: Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J 29/70: of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J 29/74: Noble metals
- C07C 5/2708: {with crystalline alumino-silicates, e.g. molecular sieves}
- C10G 29/205: {by reaction with hydrocarbons added to the hydrocarbon oil}
- C10G 45/62: containing platinum group metals or compounds thereof
- C10G 45/64: containing crystalline alumino-silicates, e.g. molecular sieves
- B01J 29/7007: {Zeolite Beta}
- B01J 37/20: Sulfiding
- B01J 2229/16: to increase the Si/Al ratio; Dealumination
- 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 2229/32: Reaction with silicon compounds, e.g. TEOS, siliconfluoride
- B01J 2229/37: Acid treatment
- B01J 2229/42: Addition of matrix or binder particles
- 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
- 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
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A process for isomerizing alkyl aromatic hydrocarbons using a catalyst comprising a zeolite and a platinum group metal component is described. The zeolite comprises a new family of zeolites designated UZM-8HS which are derived from UZM-8 zeolites by treating the UZM-8 with a fluoro-silicate salt, an acid, etc. The UZM-8HS zeolites have unique x-ray diffraction patterns.

## Claims

### Claim 1

A process for the isomerization of aromatic compounds comprising contacting a hydrocarbon stream comprising alkyl aromatic compounds with a catalytic composite at isomerization conditions to give an isomerized product wherein the catalytic composite comprises a UZM-8HS zeolite and a platinum group metal component, the UZM-8HS characterized in that it has a three-dimensional framework of at least AlO2 and SiO2 tetrahedral units and an empirical composition on an anhydrous basis in terms of mole ratios of the elements of:
M1an+Al(1−x)ExSiy′Oz″
where M1 is at least one exchangeable cation selected from the group consisting of alkali metals, alkaline earth metals, rare earth metals, ammonium ion, hydrogen ion and mixtures thereof, a is the mole ratio of M1 to (Al+E) and varies from 0.05 to about 50, E is an element selected from the group consisting of gallium, iron, boron, chromium, indium and mixtures thereof, x is the mole fraction of E and varies from 0 to about 1.0, n is the weighted average valence of M1 and has a value of about +1 to about +3, y′ is the mole ratio of Si to (Al+E) and is greater than about 6.5 and z″ is the mole ratio of O to (Al+E) and has a value determined by the equation:
z″=(a·n+3+4·y′)/2
the zeolite characterized in that it has an x-ray diffraction pattern having at least the d-spacings and relative intensities set forth in Table B:
TABLE B
2-θ
d(Å)
I/Io %
6.90-7.40
12.8-11.94
w-vs
8.15-8.66
10.84-10.21
m-vs
14.10-14.70
6.28-6.02
w-vs
19.40-20.10
4.57-4.41
w-s
22.00-22.85
4.04-3.89
m-vs
24.65-25.40
3.61-3.50
w-m
25.70-26.50
3.46-3.36
w-vs.

### Claim 2 (depends on 1)

The process of claim 1 where the hydrocarbon stream comprises a non-equilibrium mixture of xylenes and ethylbenzene.

### Claim 3 (depends on 1)

The process of claim 1 where the platinum group metal is platinum and is present from about 0.01 to about 5 mass-% of the catalytic composite on an elemental basis.

### Claim 4 (depends on 1)

The process of claim 1 where the zeolite is thermally stable up to a temperature of about 600° C.

### Claim 5 (depends on 1)

The process of claim 1 where M1 is selected from the group consisting of lithium, sodium, cesium, potassium, strontium, barium, calcium, magnesium, lanthanum, hydrogen, ammonium ion and mixtures thereof.

### Claim 6 (depends on 1)

The process of claim 1 where the isomerization conditions include a temperature of about 100° C. to about 500° C., a pressure from about 1 to about 100 atmospheres absolute and a liquid hourly space velocity (LHSV) of about 0.1 to about 30 hr−1.

### Claim 7 (depends on 6)

The process of claim 6 where the isomerization conditions further comprise hydrogen present in a hydrogen to hydrocarbon mole ratio from about 0.5:1 to about 25:1.