Chevron U.s.a. Inc.

Other

Chevron Research Company

Rawls H Frazier

John Michael Rosenbaum

Nancy J Bertrand

William Loh

Mark E Okazaki

Patricia LeMay

Tatao Luo

Frank Plavac

Yue-Rong Li

A functional fluid comprising a major amount of an oil of lubricating viscosity, and an oil soluble amount of glycerol carbonate or an oil soluble amount of a borated glycerol.

Glycerol-containing functional fluid

A lubricating oil (made from Group III base oil having a sequential number of carbon atoms) having a VI between 155 and 300, a RPVOT greater than 680 minutes, and a kinematic viscosity at 40&#xb0; C. from 19.8 cSt to 748 cSt. A lubricating oil having a high VI and high RPVOT comprising: a) a Group III base oil with a sequential number of carbon atoms, and defined cycloparaffin composition or low traction coefficient, b) an antioxidant additive concentrate and c) no VI improver. A process comprising: a) hydroisomerization dewaxing of a waxy feed, b) fractionating the produced base oil, c) selecting a fraction having a VI greater than 150, and a high level of molecules with cycloparaffinic functionality or a low traction coefficient, and d) blending the fraction with an antioxidant additive concentrate. Also, a method of improving the oxidation stability of a lubricating oil.

Lubricating oil with high oxidation stability

An ashless lubricating oil, comprising a base oil having greater than 90 wt % saturates, less than 10 wt % aromatics, a viscosity index greater than 130, low sulfur, and a sequential number of carbon atoms. The lubricating oil has a VI between 155 and 300, greater than 680 minutes in a rotary pressure vessel oxidation test, and a kinematic viscosity at 40&#xb0; C. from 19.8 to 748 cSt. An ashless paper machine oil, comprising a base oil having a sequential number of carbon atoms, wherein the oil has a defined viscosity index and high oxidation stability. Also, an ashless lubricating oil, comprising a base oil having a viscosity index greater than 150, wherein the base oil is made from a blend of petroleum-based wax and Fischer-Tropsch derived wax.

Ashless hydraulic fluid or paper machine oil

A method for improving the oxidation stability of an ashless hydraulic fluid or an ashless paper machine oil, comprising:

Method for improving the oxidation stability of ashless oil

A process for making an ashless hydraulic fluid or paper machine oil comprising a) hydroisomerization dewaxing, b) fractionating, c) selecting a fraction having a very high VI, and a high level of molecules with cycloparaffinic functionality, and d) blending the fraction with an ashless antioxidant. A process for making ashless paper machine oil, comprising:

Process to make an ashless lubricating oil with high oxidation stability

An ashless hydraulic fluid or paper machine oil having a VI between 155 and 300, a RPVOT greater than 680 minutes, and a kinematic viscosity at 40&#xb0; C. from 19.8 cSt to 748 cSt. An ashless hydraulic fluid or paper machine oil having a high VI and high RPVOT comprising: a) a Group III base oil with a sequential number of carbon atoms, and defined cycloparaffin composition or low traction coefficient, b) an ashless antioxidant additive concentrate, and c) low amount of VI improver. A process for making an ashless hydraulic fluid or paper machine oil comprising a) hydroisomerization dewaxing, b) fractionating, c) selecting a fraction having a very high VI, and a high level of molecules with cycloparaffinic functionality or a low traction coefficient, and d) blending the fraction with an ashless antioxidant. Also, a method of improving the oxidation stability of an ashless hydraulic fluid or paper machine oil.

Ashless lubricating oil with high oxidation stability

Cupric, lithium, and magnesium salts of trans-substituted 2-[1-(3-chloroallyloxyimino)alkylidene]-cyclohexane-1,3-dione and derivatives thereof. The compounds generally exhibit improved stability and enhanced shelf-life while retaining excellent pre-emergence and post-emergence grassy weed phytotoxicity. The compounds are useful as selective herbicides and at low dosages as plant growth regulating agents.

Growing community of inventors

Petaluma, CA, United States of America

Rawls H Frazier