Invention Grant
- Patent Title: Lubricating oil with high oxidation stability
- Patent Title (中): 具有高氧化稳定性的润滑油
-
Application No.: US11316311Application Date: 2005-12-21
-
Publication No.: US07662271B2Publication Date: 2010-02-16
- Inventor: William Loh , John Rosenbaum , Nancy J. Bertrand , Patricia Lemay , Rawls Frazier , Mark E. Okazaki
- Applicant: William Loh , John Rosenbaum , Nancy J. Bertrand , Patricia Lemay , Rawls Frazier , Mark E. Okazaki
- Applicant Address: US CA San Ramon
- Assignee: Chevron U.S.A. Inc.
- Current Assignee: Chevron U.S.A. Inc.
- Current Assignee Address: US CA San Ramon
- Agent Susan M. Abernathy
- Main IPC: C10G71/00
- IPC: C10G71/00 ; C10M159/22
Abstract:
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° 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.
Public/Granted literature
- US20070142250A1 Lubricating oil with high oxidation stability Public/Granted day:2007-06-21
Information query
