Methods relating to fuel compositions

Patent metadata

Field	Value
Publication number	US-9394499-B2
Application number	US-201514621606-A
Country	US
Kind code	B2
Filing date	Feb 13, 2015
Priority date	Feb 25, 2009
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

A method of removing deposits from a diesel engine, the method comprising combusting in the engine a diesel fuel composition comprising an engine cleaning additive, wherein the engine cleaning additive is the product of a Mannich reaction between: (a) an aldehyde; (b) ammonia, hydrazine or an amine; and (c) an optionally substituted phenol; wherein the or each substituent of the phenol component (c) has an average molecular weight of less than 400.

First claim

The invention claimed is:

1. A method of removing deposits from a diesel engine, the method comprising combusting in the engine a diesel fuel composition comprising an engine cleaning additive, wherein the engine cleaning additive is the product of a Mannich reaction between:
(a) an aldehyde;
(b) ammonia, hydrazine or an amine; and
(c) an optionally substituted phenol;
wherein the or each substituent of the phenol component (c) has an average molecular weight of less than 400 and wherein the diesel engine has a high pressure fuel system.

2. The method according to claim 1 wherein component (b) is a polyethylene polyamine having from 2 to 8 nitrogen atoms.

3. The method according to claim 1 wherein the engine cleaning additive is present in the diesel fuel composition in an amount of at least 30 ppm.

4. The method according to claim 1 wherein the diesel fuel composition further comprises a quaternary ammonium salt additive formed by the reaction of a nitrogen containing species having at least one tertiary amine group and a quarternizing agent.

5. The method according to claim 4 wherein the nitrogen containing species is selected from the group consisting of:
(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
(iii) a polyalkylene substituted amine having at least one tertiary amine group.

6. The method according to claim 4 wherein the quarternising agent is selected from the group consisting of dialkyl sulphates, benzyl halides, hydrocarbyl substituted carbonates, hydrocarbyl epoxides in combination with an acid, and mixtures thereof.

7. The method according to claim 1 wherein the fuel composition further comprises one or more nitrogen-containing detergents.

8. The method according to claim 7 wherein the nitrogen-containing detergent is the reaction product of a hydrocarbyl-substituted carboxylic acid acylating agent and an amine.

9. The method according to claim 1 wherein the fuel composition further comprises a metal-deactivating compound.

10. The method according to claim 1 wherein after running the engine for 24 hours there is an increase in power output of at least 3%.

11. The method according to claim 1 wherein the diesel fuel composition comprises from 0.1 to 10 ppm of a metal containing species.

12. A diesel fuel composition comprising an engine cleaning additive, wherein the engine cleaning additive is the product of a Mannich reaction between:
(a) an aldehyde;
(b) ammonia, hydrazine or an amine; and
(c) an optionally substituted phenol;
wherein the or each substituent of the phenol component (c) has an average molecular weight of less than 400.

13. The diesel fuel composition according to claim 12 wherein component (b) is a polyethylene polyamine having from 2 to 8 nitrogen atoms.

14. The diesel fuel composition according to claim 12 wherein the engine cleaning additive is present in the diesel fuel composition in an amount of at least 30 ppm.

15. The diesel fuel composition according to claim 12 further comprising a quaternary ammonium salt additive formed by the reaction of a nitrogen containing species having at least one tertiary amine group and a quarternizing.

16. The diesel fuel composition according to claim 15 wherein the nitrogen containing species is selected from the group consisting of:
(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
(ii) a polyalkylene substituted amine having at least one tertiary amine group.

17. The diesel fuel composition according to claim 15 wherein the quarternising agent is selected from the group consisting of dialkyl sulphates, benzyl halides, hydrocarbyl substituted carbonates, hydrocarbyl epoxides in combination with an acid, and mixtures thereof.

18. The diesel fuel composition according to claim 12 further comprising one or more nitrogen-containing detergents.

19. The diesel fuel composition according to claim 18 wherein the nitrogen-containing detergent is the reaction product of a hydrocarbyl-substituted carboxylic acid acylating agent and an amine.

20. The diesel fuel composition according to claim 12 further comprising a metal-deactivating compound.

21. The diesel fuel composition according to claim 12 wherein the diesel fuel composition comprises from 0.1 to 10 ppm of a metal containing species.

Assignees

• Innospec Ltd

Inventors

• Reid Jacqueline

Classifications

• C10L1/22 Primary

  containing nitrogen · CPC title

• C10L1/221

  compounds of uncertain formula; reaction products where mixtures of compounds are obtained · CPC title

• C10L1/2225

  hydroxy containing (C10L1/221 takes precedence) · CPC title

• C10L10/06 Primary

  for facilitating soot removal · CPC title

• C10L1/2387

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