润滑科技信息平台

专利摘要

A fuel oil composition comprises a major proportion of a liquid hydrocarbon middle distillate fuel having a sulphur concentration of 0.2 % or less by weight based on the weight of the fuel, and a minor proportion of a wear-reducing additive comprising an ester for increasing the lubricity of the fuel. ......

基本信息

专利类型:
发明专利
申请/专利号:
EP1994905667
申请日期:
1994-01-20
专利申请人:
埃克森化学专利公司
分类号:
["C10L1/18","C10L1/19","C10L10/08"]
发明/设计人:
CAPROTTI, RINALDO ， BOVINGTON, CHARLES HERBERT ， MACRAE, COLIN JOHN DOUGLAS
权利要求: 1. A fuel oil composition comprising a major proportion of a diesel fuel oil having a sulphur concentration of 0.2% by weight or less, and a minor proportion of an additive comprising an ester of a carboxylic acid and an alcohol wherein the acid has from 2 to 50 carbon atoms and the alcohol has one or more carbon atoms, provided that: (A) the additive is not a mixture of a polybasic acid, or a polybasic acid ester, and a partial ester of a polyhydric alcohol and a fatty acid; and (B) the additive does not comprise a reaction product between a dicarboxylic acid and an oil insoluble glycol.2. The composition of claim 1 wherein the sulphur concentration is 0.05% by weight or less.3. The composition of claim 2 wherein the sulphur concentration is 0.01% by weight or less.4. The composition of any of the preceding claims wherein the acid from which the ester is derived has the general formula R'COOH, where R' represents a hydrocarbyl group.5. The composition of claim 4 wherein the hydrocarbyl group has 10 to 30 carbon atoms, which group is alkyl or alkenyl having 1 to 3 double bonds.6. The composition of claim 5 wherein the acid has 12 to 22 carbon atoms.7. The composition of any of claim 1 to 3 wherein the acid is a polycarboxlic acid of the formula R'(COOH)x wherein x represents an integer from 2 to 4 and R' represents a substituted or unsubstituted polymethylene group.8. The composition of claim 7 wherein the acid is a dicarboxylic acid.9. The composition of any of the preceding claims wherein the alcohol is an alkyl alcohol having from 1 to 6 carbon atoms.10. The composition of claim 9 wherein the alcohol is methanol.11. The composition of any of claims 1 to 8 wherein the alcohol is an aliphatic, saturated or unsaturated, straight chain or branched polyhydric alcohol having 2 to 10 hydroxy groups and 2 to 90 carbon atoms in the molecule.12. The composition of claim 11 wherein the alcohol has 2 to 4 hydroxy groups and 2 to 5 carbon atoms in the molecule.13. The composition of claim 12 wherein the alcohol is glycerol.14. The composition of claim 13 wherein the ester is glycerol monooleate.15. The composition of any of the preceding claims wherein the concentration of additive in the fuel oil is in the range of 10 to 10,000 ppm by weight of active ingredient per weight of fuel oil.16. The composition of claim 15 wherein the concentration is 100 to 200 ppm.17. The use of a fuel oil composition of any of the preceding claims as the fuel in a diesel engine for controlling wear rate in the injection system of the engine in operation of the engine.18. A method of operating a compression-ignition engine comprising providing a fuel oil composition of any of the preceding claims as the fuel in the engine thereby to control wear rate in the injection system of the engine.19. The use of claim 17 or method of claim 18 wherein the wear is in the injection pump of the engine.