# US 4,400,178 A · Liquid fuels containing polyamine dispersants

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- Number: US 4,400,178 A
- Document ID: US4400178A
- Status: Granted
- Kind: A
- Application number: 06/301,844
- Filed: 1981-09-14
- Granted: 1983-08-23
- Earliest claimed: 1980-04-21
- Assignees: The Lubrizol Corporation
- Inventors: Donald I. Hoke
- Web page: https://patentgrep.com/patent/US4400178A

## CPC

- C10L 1/2222: {(cyclo)aliphatic amines; polyamines (no macromolecular substituent 30C); quaternair ammonium compounds; carbamates (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

Certain polyamines are useful carburetor dispersants for liquid fuel compositions. Among the suitable polyamines are diamines which may be prepared by the Mannich reaction of certain primary or secondary amines with an aldehyde such as formaldehyde and an aliphatic nitro compound such as 2-nitropropane, followed by reduction of the nitro group.

## Claims

### Claim 1

A fuel composition comprising a major amount of a normally liquid fuel and a minor amount of at least one polyamine of the formula ##STR4## wherein: R.sup.1 is an aliphatic hydrocarbon-based radical free from acetylenic unsaturation and containing 16-18 carbon atoms;
R.sup.2 is hydrogen or an aliphatic hydrocarbon-based radical free from acetylenic unsaturation and containing 16-18 carbon atoms; and
each of R.sup.4 and R.sup.5 is a lower alkyl radical.

### Claim 2 (depends on 1)

A composition according to claim 1 wherein R.sup.1 is R.sup.6 O-R.sup.7 --, R.sup.2 is hydrogen, R.sup.6 is an alkyl radical, and R.sup.7 is an alkylene radical containing about 2-6 carbon atoms.

### Claim 3 (depends on 2)

A composition according to claim 2 wherein each of R.sup.4 and R.sup.5 is methyl.

### Claim 4 (depends on 3)

A composition according to claim 3 wherein R.sup.6 is tridecyl and R.sup.7 is trimethylene.

### Claim 5 (depends on 1)

A composition according to claim 1 wherein R.sup.1 is an alkyl radical.

### Claim 6 (depends on 5)

A composition according to claim 5 wherein R.sup.2 is hydrogen.

### Claim 7 (depends on 6)

A composition according to claim 6 wherein each of R.sup.4 and R.sup.5 is methyl.

### Claim 8 (depends on 7)

A composition according to claim 7 wherein R.sup.1 is derived from tallow fatty acids.

### Claim 9 (depends on 5)

A composition according to claim 5 wherein R.sup.2 is an alkyl radical.

### Claim 10 (depends on 9)

A composition according to claim 9 wherein each of R.sup.4 and R.sup.5 is methyl.

### Claim 11 (depends on 10)

A composition according to claim 10 wherein R.sup.1 and R.sup.2 are derived from tallow fatty acids. PG,14

### Claim 12 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)

A composition according to any of claims 1 and 2-11 wherein the fuel is gasoline.