# US 4,399,059 A · Zeolite catalysts modified with group IIIA metal

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- Number: US 4,399,059 A
- Document ID: US4399059A
- Status: Granted
- Kind: A
- Application number: 06/426,408
- Filed: 1982-09-29
- Granted: 1983-08-16
- Earliest claimed: 1980-12-02
- Assignees: Mobil Oil Corporation
- Inventors: Chin-Chiun Chu
- Web page: https://patentgrep.com/patent/US4399059A

## CPC

- C07C 2/864: {the non-hydrocarbon is an alcohol}
- B01J 29/40: of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J 29/405: {containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead}
- C07C 2/66: Catalytic processes
- C07C 6/123: {of only one hydrocarbon}
- C07C 6/126: {of more than one hydrocarbon}
- B01J 29/65: of the ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38, as exemplified by patent documents US4046859, US4016245 and US4046859, respectively
- B01J 29/70: of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- 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 2229/26: to stabilize the total catalyst structure
- B01J 2229/42: Addition of matrix or binder particles
- C07C 2529/40: of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
- Y02P 20/52: using catalysts, e.g. selective catalysts
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g., conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g., at least 0.5 weight percent of a Group IIIA element, e.g., scandium, yttrium or Rare Earth elements, and optionally phosphorus, said elements being present in the form of their oxides.

## Claims

### Claim 1

A catalyst composition suitable for para-selective conversion of substituted aromatic compounds, said composition comprising a modified crystalline zeolite catalyst component characterized by a silica to alumina mole ratio of at least 12 and a constraint index within the approximate range of 1 to 12, said composition further having incorporated thereon at least 0.5 weight percent of at least one element of Group IIIA of the Periodic Chart, said element being in its oxide form when combined with said catalyst composition.

### Claim 2 (depends on 1)

The composition of claim 1 wherein said element of Group IIIA is scandium.

### Claim 3 (depends on 2)

The composition of claim 2 wherein said scandium comprises between 1 and 30 weight percent of the modified zeolite catalyst composition.

### Claim 4 (depends on 1)

The composition of claim 1 wherein said Group IIIA element is yttrium.

### Claim 5 (depends on 4)

The process of claim 4 wherein said yttrium comprises between 1 and 40 weight percent of the modified zeolite catalyst composition.

### Claim 6 (depends on 1)

The composition of claim 1 wherein said Group IIIA element is one or a mixture of the Rare Earth elements.

### Claim 7 (depends on 6)

The composition of claim 6 wherein said Rare Earth element or mixture thereof comprises between 1 and 45 weight percent of the modified zeolite catalyst composition.

### Claim 8 (depends on 1)

The composition of claim 1 which further has incorporated thereon at least 0.25 weight percent of the element phosphorus in addition to said Group IIIA element, said phosphorus and said Group IIIA metal both being in the oxide form when combined with said catalyst composition.

### Claim 9 (depends on 8)

The composition of claim 8 wherein said Group IIIA element is scandium.

### Claim 10 (depends on 8)

The composition of claim 8 wherein said Group IIIA element is yttrium.

### Claim 11 (depends on 8)

The composition of claim 8 wherein said element is one or a mixture of the Rare Earth elements.

### Claim 12 (depends on 1)

The composition of claim 1 wherein said composition comprises a zeolite admixed with a binder therefor.

### Claim 13 (depends on 1, 3, 5, 7, 8, 12)

The composition of claim 1, 3, 5, 7, 8 or 12 wherein said zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.

### Claim 14 (depends on 13)

The composition of claim 13 wherein said zeolite is ZSM-5.

### Claim 15 (depends on 13)

The composition of claim 13 wherein said zeolite is ZSM-11.