Diesel detergent without a low molecular weight penalty

Patent metadata

Field	Value
Publication number	US-10202559-B2
Application number	US-201314434985-A
Country	US
Kind code	B2
Filing date	Oct 22, 2013
Priority date	Oct 23, 2012
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

The composition of the present invention related to a quaternary ammonium salt detergent and the use of such quaternary ammonium salt detergents in a fuel composition to reduce diesel injector deposits and remove or clean up existing deposits on the diesel injectors.

First claim

What is claimed is:

1. A method of minimizing creation of internal diesel injector deposits while additionally reducing the level of pre-existing internal diesel injector deposits comprising the step of supplying to a diesel engine a diesel fuel composition comprising (A) diesel fuel; and (B) a composition comprising a quaternary ammonium salt, wherein the quaternary ammonium salt comprises the reaction product of:
a) a compound comprising
(i) at least one tertiary amino group, and
(ii) a hydrocarbyl-substituent derived from a hydrocarbon having a number average molecular weight of from about 100 to about 500;

b) a quaternizing agent suitable for converting the tertiary amino group of compound (a) to a quaternary nitrogen, said quaternizing agent comprising hydrocarbyl epoxides used in combination with an acid; and
c) has a cation represented by the following formula:

 wherein: R 21 is a hydrocarbyl group containing from 1 to 3 carbon atoms; R 22 is a hydrocarbyl group containing from 1 to 3 carbon atoms; R 23 is a hydrocarbylene group containing from 1 to 3 carbon atoms; R 24 is a hydrocarbyl group containing from 7 to about 36 carbon atoms; and X is a group derived from the quaternizing agent.

2. The method of claim 1 wherein component a), the compound comprising at least one tertiary amino group and at least one hydrocarbyl-substituent, of said first quaternary ammonium salt comprises:
(I) the condensation product of an acylating agent substituted with the hydrocarbyl-substituent of a)ii) and a compound having an oxygen or nitrogen atom capable of condensing the acylating agent wherein the condensation product has at least one tertiary amino group;
(II) an amine substituted with the hydrocarbyl-substituent of a)ii), wherein the amine has at least one tertiary amino group and the hydrocarbyl-substituent is a polyalkene-substituent;
(III) a compound containing at least one hydrocarbyl-substituent of a)ii) and at least one tertiary amino group, wherein the hydrocarbyl-substituent is a polyester group;
(IV) a compound containing at least one hydrocarbyl-substituent of a)ii) and at least one tertiary amino group, wherein the hydrocarbyl-substituent is a polyether group; or
(V) any combination thereof.

3. The method of claim 1 wherein component a), the compound comprising at least one tertiary amino group, of said first quaternary ammonium salt comprises the product of a hydrocarbyl-substituted acylating agent and a compound having an oxygen or nitrogen atom and further having at least one tertiary amino group; and
wherein the hydrocarbyl-substituted acylating agent is polyisobutylene succinic anhydride and the compound having an oxygen or nitrogen atom is dimethyl ethanolamine, diethyl ethanolamine, N,N-dimethyl-aminopropylamine, N,N-diethyl-aminopropylamine, N,N-dimethyl-aminoethylamine, and N,N-diethyl-aminoethyl amine.

4. The method of claim 1 wherein component a), the compound comprising at least one tertiary amino group of said first quaternary ammonium salt, comprises a polyalkene-substituted amine having at least one tertiary amino group;
wherein the polyalkene substituent of the polyalkene-substituted amine is derived from polyisobutylene having a number average molecular weight of about 150 to about 500.

5. The method of claim 1 , additionally comprising a second quaternary ammonium salt, wherein the second quaternary ammonium salts comprises the reaction product of:
a) a compound comprising
(i) at least one tertiary amino group, and
(ii) a hydrocarbyl-substituent derived from a hydrocarbon having a number average molecular weight of from about 500 to about 5000;

b) a quaternizing agent suitable for converting the tertiary amino group of compound (a) to a quaternary nitrogen.

6. The method of claim 1 , wherein the diesel fuel is ultra-low sulfur diesel fuel.

7. The method of claim 1 , wherein the quaternary ammonium salt is present from about 10 to about 500 ppm.

8. The method of claim 1 wherein the diesel engine comprises high pressure common rail diesel injectors.

9. The method of claim 1 , wherein said diesel fuel composition further comprises tall oil fatty acid.

Assignees

• Lubrizol Corp

Inventors

• Bush James H
• Barbour Robert H
• Moreton David J
• Greenfield Hannah
• Stevenson Paul R
• Arters David C

Classifications

• C10L1/08

  for compression ignition · CPC title

• C10L1/238

  obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds {(C10L1/221 takes 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

• C10L10/06

  for facilitating soot removal · CPC title

• C10L2270/026

  for diesel engines, e.g. automobiles, stationary, marine · CPC title