# US 5,703,264 A · Process for producing aliphatic nitrile

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- Number: US 5,703,264 A
- Document ID: US5703264A
- Status: Granted
- Kind: A
- Application number: 08/670,787
- Filed: 1996-06-24
- Granted: 1997-12-30
- Earliest claimed: 1995-07-06
- Assignees: Kao Corporation
- Inventors: Wataru Yoshida; Tetsuaki Fukushima; Hideki Taniguchi; Hiroshi Abe
- Web page: https://patentgrep.com/patent/US5703264A

## CPC

- B01J 23/8933: {also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36}
- B01J 23/8926: {Copper and noble metals}
- C07C 253/00: Preparation of carboxylic acid nitriles (of cyanogen or compounds thereof C01C3/00)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

The process for producing an aliphatic nitrile comprising reacting an aliphatic alcohol having 6 to 40 carbon atoms with ammonia (a) in the presence of a copper/transition metal element in the fourth period other than Cr/platinum group element in the eighth group catalyst, (b) under a reaction system pressure in the range of from atmospheric pressure to 100 atm, (c) at a reaction system temperature in the range of from 100.degree. to 250.degree. C., (d) while introducing at least one gas selected from the group consisting of inert gases and hydrogen gas into the reaction system, (e) removing water formed by the reaction out of the reaction system, and (f) controlling the amount of the ammonia contained in the gas (exclusive of the water formed by the reaction) discharged out of the reaction system to 5 to 50% by volume based on the volume of the gas discharged (exclusive of the water formed by the reaction) makes it possible to produce various kinds of aliphatic nitriles.

## Claims

### Claim 1

A process for producing an aliphatic nitrile comprising reacting an aliphatic alcohol having 6 to 40 carbon atoms with ammonia:
(a) in the presence of a catalyst comprising copper, a transition metal element in the fourth period other than Cr and a platinum group element in the eighth group,
(b) under a reaction system pressure in the range of from atmospheric pressure to 100 atm,
(c) at a reaction system temperature in the range of from 100.degree. to 250.degree. C.,
(d) while introducing at least one gas selected from the group consisting of inert gases and hydrogen gas into the reaction system,
(e) removing water formed by the reaction out of the reaction system, and
(f) controlling the amount of the ammonia contained in the gas, exclusive of the water formed by the reaction, discharged out of the reaction system to 5 to 50% by volume based on the volume of the gas discharged, exclusive of the water formed by the reaction.

### Claim 2 (depends on 1)

The process for producing an aliphatic nitrile according to claim 1, wherein the catalyst comprising copper, a transition metal element in the fourth period other than Cr and a platinum group element in the eighth group, contains metals in a weight ratio of copper:the transition metal element in the fourth period other than Cr:the platinum group element in the eighth group of 0.1 to 10:1:0.001 to 0.5.

### Claim 3 (depends on 1)

The process for producing an aliphatic nitrile according to claim 1, wherein the transition metal element in the fourth period is at least one member selected from the group consisting of nickel, cobalt and zinc, and the platinum group element in the eighth group is at least one member selected from the group consisting of platinum, palladium and ruthenium.

### Claim 4 (depends on 1)

The process for producing an aliphatic nitrile according to claim 1, wherein the aliphatic alcohol has 8 to 36 carbon atoms.

### Claim 5 (depends on 4)

The process for producing an aliphatic nitrile according to claim 4, wherein the aliphatic alcohol is a saturated or unsaturated (having a double bond and no triple bond) alcohol having 8 to 36 carbon atoms.

### Claim 6 (depends on 4)

The process for producing an aliphatic nitrile according to claim 4, wherein the aliphatic alcohol is a saturated alcohol having 8 to 36 carbon atoms.

### Claim 7 (depends on 1)

The process for producing an aliphatic nitrile according to claim 1, wherein the gas introduced into the reaction system is an inert gas.