# US 4,395,372 A · Alkylation process

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- Number: US 4,395,372 A
- Document ID: US4395372A
- Status: Granted
- Kind: A
- Application number: 06/406,665
- Filed: 1982-08-09
- Granted: 1983-07-26
- Earliest claimed: 1982-08-09
- Assignees: Shell Oil Company
- Inventors: Robert Q. Kluttz; Lynn H. Slaugh
- Web page: https://patentgrep.com/patent/US4395372A

## CPC

- C07C 253/30: by reactions not involving the formation of cyano groups
- C07C 2/66: Catalytic processes
- C07C 2529/08: of the faujasite type, e.g. type X or Y
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

A process is disclosed for alkylation of benzenes with lower olefins which comprises contacting the benzene and lower olefin with a rare earth exchanged X or Y zeolite catalyst in the presence of sulfur dioxide.

## Claims

### Claim 1

A process for alkylating benzene and substituted benzenes with olefins having carbon numbers ranging from 3 to about 6 which process comprises contacting said benzene or substituted benzene with said olefin at a temperature ranging from about 50.degree. C. to about 300.degree. C. and a pressure ranging from about 1 to about 200 atmospheres with a rare-earth-exchanged zeolite in the presence of sulfur dioxide.

### Claim 2 (depends on 1)

The process of claim 1 wherein the zeolite is a faujasite type.

### Claim 3 (depends on 2)

The process of claim 2 wherein zeolite is an X-zeolite or a Y-zeolite.

### Claim 4 (depends on 1)

The process of claim 1 wherein the zeolite is at least fifty percent exchanged with the rare earth.

### Claim 5 (depends on 4)

The process of claim 4 wherein the rare earth is lanthanium or cerium.

### Claim 6 (depends on 1)

The process of claim 1 wherein the sulfur dioxide concentration in the reaction mixture ranges from about 0.005 to about 1.0 moles per liter.