# US 4,392,866 A · Etheramine corrosion inhibitor for alcohols

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- Number: US 4,392,866 A
- Document ID: US4392866A
- Status: Granted
- Kind: A
- Application number: 06/318,532
- Filed: 1981-11-05
- Granted: 1983-07-12
- Earliest claimed: 1981-11-05
- Assignees: Texaco Inc.
- Inventors: Rodney L. Sung; George J. Sidote; William M. Sweeney
- Web page: https://patentgrep.com/patent/US4392866A

## CPC

- C10L 1/2225: {hydroxy containing (C10L1/221 takes precedence)}
- C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS

## Abstract

Alcohols may be inhibited against corrosion by addition thereto of an ether amine ##STR1## typically C.sub.12 H.sub.25 OCH.sub.2 CH.sub.2 CH.sub.2 NHCH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2.

## Claims

### Claim 1

A composition comprising
(i) a water-soluble alcohol; and
(ii) as corrosion inhibiting additive an effective corrosion-inhibiting amount of an amine having the formula ##STR5## wherein R contains 1-30 carbon atoms and is selected from the group consisting of alkyl, alkenyl, alkaryl, aralkyl, cycloalkyl, and aryl groups and R' and R" are the same or different divalent hydrocarbon group containing 1-30 carbon atoms and are selected from the group consisting of alkylene, alkenylene, alkarylene, aralkylene, cycloalkylene, and arylene groups, and a and b are each an integer 1-2, and a plus b is less than four.

### Claim 2 (depends on 1)

A composition as claimed in claim 1 wherein said water-soluble alcohol composition contains ethanol.

### Claim 3 (depends on 1)

A composition as claimed in claim 1 wherein said water-soluble alcohol composition contains methanol.

### Claim 4 (depends on 1)

A composition as claimed in claim 1 wherein said water-soluble alcohol composition contains anhydrous methanol or ethanol.

### Claim 5 (depends on 1)

A composition as claimed in claim 1 wherein said water-soluble alcohol composition contains ethanol together with acidic contaminants.

### Claim 6 (depends on 1)

A composition as claimed in claim 1 wherein said additive is
(ROR')NH(R"NH.sub.2).

### Claim 7 (depends on 6)

A composition as claimed in claim 6 wherein R is a C.sub.6 -C.sub.13 alkyl.

### Claim 8 (depends on 6)

A composition as claimed in claim 6 wherein R' is a C.sub.2 -C.sub.3 straight chain alkyl.

### Claim 9 (depends on 6)

A composition as claimed in claim 6 wherein R is a C.sub.6 -C.sub.13 straight chain alkyl and R' and R" are C.sub.2 -C.sub.3 straight chain alkyl.

### Claim 10 (depends on 6)

A composition as claimed in claim 6 wherein said additive is
C.sub.12 H.sub.25 OCH.sub.2 CH.sub.2 CH.sub.2 --NHCH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2.

### Claim 11 (depends on 1)

A composition as claimed in claim 1 wherein said additive is
(ROR').sub.2 N(R"NH.sub.2).

### Claim 12 (depends on 11)

A composition as claimed in claim 11 wherein R is a C.sub.6 -C.sub.13 alkyl.

### Claim 13 (depends on 11)

A composition as claimed in claim 11 wherein R' and R" are C.sub.2 -C.sub.3 straight chain alkyl.

### Claim 14 (depends on 11)

A composition as claimed in claim 11 wherein R is a C.sub.6 -C.sub.13 straight chain alkyl and R' and R" are C.sub.2 -C.sub.3 straight chain alkyl.

### Claim 15 (depends on 11)

A composition as claimed in claim 11 wherein said additive is
(C.sub.12 H.sub.25 OCH.sub.2 CH.sub.2 CH.sub.2).sub.2 N(CH.sub.2 CH.sub.2 NH.sub.2).

### Claim 16 (depends on 1)

A composition as claimed in claim 1 wherein said additive is (ROR') N (R"NH.sub.2).sub.2.

### Claim 17 (depends on 16)

A composition as claimed in claim 16 wherein R is a C.sub.6 -C.sub.13 alkyl.

### Claim 18 (depends on 16)

A composition as claimed in claim 16 wherein R' and R" are C.sub.2 -C.sub.3 straight chain alkyl.

### Claim 19 (depends on 16)

A composition as claimed in claim 16 wherein R is a C.sub.6 -C.sub.13 straight chain alkyl and R' and R" are C.sub.2 -C.sub.3 straight chain alkyl.

### Claim 20 (depends on 16)

A composition as claimed in claim 16 wherein said additive is
(C.sub.12 H.sub.25 OCH.sub.2 CH.sub.2 CH.sub.2)N(CH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2).sub.2.

### Claim 21

A composition comprising:
(i) at least one of ethanol and methanol and
(ii) 0.25-25 PTB of
C.sub.12 H.sub.25 OCH.sub.2 CH.sub.2 CH.sub.2 NHCH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2.

### Claim 22

The method of inhibiting against corrosion a water-soluble alcohol composition which comprises adding to said water-soluble alcohol composition an amine having the formula ##STR6## wherein R contains 1-30 carbon atoms and is selected from the group consisting of alkyl, alkenyl, alkaryl, aralkyl, cycloalkyl, and aryl groups and R' and R" are divalent hydrocarbon group containing 1-30 carbon atoms and is seleced from the group consisting of alkylene, alkenylene, alkarylene, aralkylene, cycloalkylene, and arylene groups, and a and b are each an integer 1-2, and a plus b is less than four.