润滑科技信息平台

Method for improving low temperature stability of a friction modifier additive

专利摘要

Disclosed herein is a method comprising the steps of (a) providing a fuel additive concentrate comprising (i) from about 5 to about 50 wt. %, based on the total weight of the fuel additive concentrate, of one or more fatty acid sorbitan esters, and (ii) about 10 to about 95 wt. %, based on the total weight of the fuel additive concentrate, of a fuel carrier fluid, and (b) storing the fuel additive concentrate at a low temperature environment. Also disclosed is a method operating an internal combustion engine with a fuel composition comprising (a) a major amount of a fuel, and (b) a minor amount of one or more fatty acid sorbitan esters in a low temperature environment. ......

基本信息

专利类型:
发明专利
申请/专利号:
US15/281360
申请日期:
2016-09-30
专利申请人:
CHEVRON U.S.A. INC.
分类号:
C10L1/19; C10L1/16; C10L1/22; C10L10/14; C10L10/08; C10L1/222; C10L1/182
发明/设计人:
GUNAWAN, THERESA LIANG
权利要求: 1. A method comprising the steps of (a) receiving a fuel additive solution consisting of (i) from about 5 to about 50 wt. %, based on the total weight of the fuel additive solution, of one or more fully saturated fatty acid sorbitan esters selected from the group consisting of sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, and sorbitan monoisostearate, (ii) about 10 to about 95 wt. %, based on the total weight of the fuel additive solution, of a hydrocarbon fluid, and (iii) optionally, one or more fuel additives selected from the group consisting of a detergent, cetane improver, antioxidant, metal deactivator, dye, marker, corrosion inhibitor, antistatic additive, drag reducing agent, demulsifier, dehazer, anti-icing additive, lubricity additives, combustion improver, and anti-knock agent; and (b) storing the fuel additive solution in a low temperature environment corresponding to a temperature from about 0° C. and below.2. The method of claim 1, wherein the hydrocarbon fluid is a petroleum or synthetic lubricating oil basestock.3. The method of claim 1, wherein the fuel additive solution consists of from about 50 to about 95 wt. based on the total weight of the fuel additive solution, of the fuel carrier fluid.4. The method of claim 1, wherein the fuel additive solution consists of from about 5 to about 30 wt. %, based on the total weight of the fuel additive solution, of the one or more fully saturated fatty acid sorbitan esters.5. The method of claim 1, wherein the low temperature environment corresponds to a temperature of about −5° C. and below.6. A method comprising operating an internal combustion engine with a fuel composition consisting of (a) a major amount of a fuel, and (b) a minor amount of one or more fully saturated fatty acid sorbitan esters selected from the group consisting of sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, and sorbitan monoisostearate in a low temperature environment corresponding to a temperature from about 0° C. and below, wherein the one or more fully saturated fatty acid sorbitan esters are present in a fuel additive solution consisting of (i) from about 5 to about 50 wt. %, based on the total weight of the fuel additive solution, of the one or more fully saturated fatty acid sorbitan esters; (ii) about 10 to about 95 wt. %, based on the total weight of the fuel additive solution, of a hydrocarbon fluid; and (iii) optionally, one or more fuel additives selected from the group consisting of a detergent, cetane improver, antioxidant, metal deactivator, dye, marker, corrosion inhibitor, antistatic additive, drag reducing agent, demulsifier, dehazer, anti-icing additive, lubricity additives, combustion improver, and anti-knock agent.7. The method of claim 6, wherein the minor amount of the one or more fully saturated fatty acid sorbitan esters is from about 50 parts per million weight (ppmw) to about 1 wt. %.8. The method of claim 6, wherein the hydrocarbon fluid is a petroleum or synthetic lubricating oil basestock.9. The method of claim 6, wherein the low temperature environment corresponds to a temperature of from about −5° C. and below.10. A method comprising the steps of (a) receiving a fuel additive solution consisting of (i) from about 5 to about 50 wt. %, based on the total weight of the fuel additive solution, of one or more fully saturated fatty acid sorbitan esters selected from the group consisting of sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, and sorbitan monoisostearate, (ii) about 10 to about 95 wt. %, based on the total weight of the fuel additive solution, of a hydrocarbon fluid, (iii) a low molecular weight alcohol solvent; and (iv) optionally, one or more fuel additives selected from the group consisting of a detergent, cetane improver, antioxidant, metal deactivator, marker, corrosion inhibitor, antistatic additive, drag reducing agent, demulsifier, dehazer, anti-icing additive, lubricity additives, combustion improver, and anti-knock agent; and (b) storing the fuel additive solution in a low temperature environment corresponding to a temperature from about 0° C. and below.11. The method of claim 10, wherein the low molecular weight alcohol solvent is a C1 to C12 alcohol.12. The method of claim 10, wherein the low molecular weight alcohol solvent is present in an amount of up to about 50 wt. % based on the total weight of the fuel additive solution.