# US 4,380,669 A · Process for synthesizing aniline

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- Number: US 4,380,669 A
- Document ID: US4380669A
- Status: Granted
- Kind: A
- Application number: 06/252,487
- Filed: 1981-04-08
- Granted: 1983-04-19
- Earliest claimed: 1981-04-08
- Assignees: Mobil Oil Corporation
- Inventors: Clarence D. Chang; William H. Lang
- Web page: https://patentgrep.com/patent/US4380669A

## CPC

- C07C 209/18: with formation of amino groups bound to carbon atoms of six-membered aromatic rings or from amines having nitrogen atoms bound to carbon atoms of six-membered aromatic rings
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

A process for converting phenolic compounds to aniline by passing them over ammonia in the presence of ZSM-5 type zeolites under conversion conditions whereby high conversion, high selectivity and improved rates of production are achieved.

## Claims

### Claim 1

A process for converting phenol or phenolic type compounds to aniline or substituted anilines comprising contacting said phenol or phenolic compound with ammonia or a suitable amine under conversion conditions in the presence of a crystalline alumino silicate zeolite having a constraint index within the approximate range of 1-12 and a silica to alumina ratio of at least 12.

### Claim 2 (depends on 1)

The process of claim 1 wherein the phenolic compound is converted to aniline by contacting it with ammonia.

### Claim 3 (depends on 2)

The process of claim 2 wherein the conversion conditions are as follows:
Temperature--about 400.degree.-1200.degree. F.;
Pressure--about 1-250 atmospheres;
Reaction Time--LHSV from about 0.5-50.

### Claim 4 (depends on 1, 2, 3)

The process of claim 1, 2 or 3 wherein the crystalline aluminosilicate is a ZSM-5 type zeolite selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-38, ZSM-35 wherein in said zeolites may be base exchanged, contain metal cations or be acidic in nature.

### Claim 5 (depends on 4)

The process of claim 4 wherein the zeolite is ZSM-5.

### Claim 6 (depends on 4)

The process of claim 4 wherein the zeolite is H-ZSM-5.

### Claim 7 (depends on 4)

The process of claim 4 wherein the zeolite is ZSM-11.

### Claim 8 (depends on 4)

The process of claim 4 wherein the zeolite is H-ZSM-11.