Fuel composition comprising detergent and quaternary ammonium salt additive

Patent metadata

Field	Value
Publication number	US-12570914-B2
Application number	US-202016938497-A
Country	US
Kind code	B2
Filing date	Jul 24, 2020
Priority date	Mar 10, 2010
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

A method of reducing deposits in a diesel engine, the method comprising combusting in the engine a diesel fuel composition comprising a detergent additive which is not a quaternary ammonium salt or a Mannich reaction product; and a quaternary ammonium salt additive comprising the reaction product of nitrogen containing species having at least one tertiary amine group and a quaternizing agent; wherein the nitrogen containing species is selected from:
(i) the reaction product of a hydrocarbyl-substituted acylating agent and a compound comprising at least one tertiary amine group and a primary amine, secondary amine or alcohol group; (ii) a Mannich reaction product comprising a tertiary amine group; and (v) a polyalkylene substituted amine having at least one tertiary amine group.

First claim

The invention claimed is:

1 . A method of reducing deposits in a diesel engine, the method comprising:
combusting in the engine a diesel fuel composition comprising a detergent additive, which is not a quaternary ammonium salt or a Mannich reaction product, and a quaternary ammonium salt additive comprising the reaction product of nitrogen containing species having at least one tertiary amine group and an ester quaternizing agent; wherein the nitrogen containing species is the reaction product of a hydrocarbyl-substituted acylating agent and a compound comprising at least one tertiary amine group and a primary amine, secondary amine or alcohol group; wherein the method provides improved performance in modern diesel engines having a high pressure fuel system and in traditional diesel engines; and wherein the detergent additive is the reaction product of a carboxylic acid derived acylating agent and an amine.

2 . The method according to claim 1 in which the formation of deposits is inhibited or prevented to provide a keep clean performance.

3 . The method according to claim 1 in which the existing deposits are removed to provide a clean up performance.

4 . The method according to claim 1 wherein the quaternizing agent is an ester of a carboxylic acid.

5 . The method according to claim 1 wherein the nitrogen containing species comprises a compound formed by the reaction of a hydrocarbyl-substituted acylating agent and an amine of formula (I) or (II):

wherein R 2 and R 3 are the same or different alkyl groups having from 1 to 22 carbon atoms; X is an alkylene group having from 1 to 20 carbon atoms; n is from 0 to 20; m is from 1 to 5; and R 4 is hydrogen or a C 1 to C 22 alkyl group.

6 . The method according to claim 1 wherein the quaternizing agent comprises a compound of formula (III):

wherein R is a substituted alkyl, alkenyl, aryl or alkylaryl group; and R 1 is a C 1 to C 22 alkyl, aryl or alkylaryl group.

7 . The method according to claim 1 wherein the detergent additive is made by reacting a poly(isobutene)-substituted succinic acid-derived acylating agent wherein the poly(isobutene) substituent has between about 12 to about 200 carbon atoms with a mixture of ethylene polyamines having 3 to about 9 amino nitrogen atoms per ethylene polyamine and about 1 to about 8 ethylene groups.

8 . The method according to claim 1 wherein the detergent additive is the reaction product between a hydrocarbyl-substituted succinic acid or anhydride and hydrazine.

9 . The method according to claim 1 wherein the quaternizing agent is selected from dimethyl oxalate, methyl 2-nitrobenzoate and methyl salicylate.

10 . The method according to claim 1 wherein the diesel engine has a high pressure fuel system.

Assignees

• Innospec Ltd

Inventors

• Reid Jacqueline
• Burgess Vincent

Classifications

• C10L2200/029

  Salts, such as carbonates, oxides, hydroxides, percompounds, e.g. peroxides, perborates, nitrates, nitrites, sulfates, and silicates · CPC title

• C10L1/232

  containing nitrogen in a heterocyclic ring {(C10L1/221 takes precedence)} · CPC title

• C10L1/189

  having at least one carboxyl group bound to an aromatic carbon atom {(C10L1/1802, C10L1/1805, C10L1/1808, C10L1/1811, C10L1/1814, C10L1/1817, C10L1/1885, C10L1/1886, C10L1/1888 take precedence)} · CPC title

• C10L1/2387

  Polyoxyalkyleneamines {(poly)oxyalkylene amines and derivatives thereof (substituted by a macromolecular group containing 30C) (C10L1/221 takes precedence)} · CPC title

• C10L1/1881

  carboxylic group attached to an aliphatic carbon atom · CPC title