US2018334633A1PendingUtilityA1

Method for improving the air release of a lubricating oil in a hydraulic system

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Assignee: SHELL OIL COPriority: Nov 24, 2015Filed: Nov 22, 2016Published: Nov 22, 2018
Est. expiryNov 24, 2035(~9.3 yrs left)· nominal 20-yr term from priority
Inventors:Anne Taylor ColemanSravani GullapalliJennifer Lin Karam Kensler
C10M 2203/10C10N 2030/00C10M 2203/102C10M 2203/1025C10N 2030/02C10N 2020/02C10M 2203/1006C10N 2040/08C10M 107/02C10M 111/04C10M 2205/173C10M 169/04C10N 2230/02C10N 2240/08C10N 2220/022
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Claims

Abstract

The invention provides a method for improving the air release of a lubricating oil in a hydraulic system, said method comprising supplying the lubricating oil to the hydraulic system. The air release is measured according to ASTM D3427.

Claims

exact text as granted — not AI-modified
1 . A method for improving the air release of a lubricating oil in a hydraulic system, said method comprising supplying the lubricating oil to the hydraulic system;
 wherein the lubricating oil comprises at least 90% by mass, based upon the mass of the lubricating oil, of base oil, and wherein at least 70% by mass, based upon the mass of the base oil, is GTL base oil;   wherein the viscosity of the GTL base oil at 100° C. is from 2 to 20 cSt;   wherein the lubricating oil comprises less than 10% by mass, based upon the mass of the lubricating oil, of additives;   wherein the viscosity of the lubricating oil at 40° C. is from 20 to 100 cSt; and   wherein air release is measured according to ASTM D3427 and is improved as compared to air release achieved using a lubricating oil which comprises less than 70% by mass of GTL base oil.   
     
     
         2 . The method according to  claim 1 , wherein the base oil comprises at least 10% by mass of a base oil chosen from Group I, Group II or Group III. 
     
     
         3 . The method according to  claim 1 , wherein the viscosity of the GTL base oil at 100° C. is from 3 to 10 cSt. 
     
     
         4 . The method according to  claim 1 , wherein the lubricating oil comprises less than 5% by mass, based upon the mass of the lubricating oil, of additives. 
     
     
         5 . The method according to  claim 1 , wherein the lubricating oil comprises at least 0.5% by mass, based upon the mass of the lubricating oil, of additives. 
     
     
         6 . The method according to  claim 1 , wherein the viscosity of the lubricating oil at 40° C. is from 25 to 80 cSt.

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