发明名称 |
LUBRICATING OIL WITH HIGH OXIDATION STABILITY |
摘要 |
<p>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.</p> |
申请公布号 |
EP1973997(A2) |
申请公布日期 |
2008.10.01 |
申请号 |
EP20060845921 |
申请日期 |
2006.12.19 |
申请人 |
CHEVRON U.S.A., INC. |
发明人 |
LOH, WILLIAM;ROSENBAUM, JOHN;BERTRAND, NANCY, J.;LEMAY, PATRICIA;FRAZIER, RAWLS;OKAZAKI, MARK E. |
分类号 |
C10M107/02;C10G35/00;C10G71/00;C10N30/02;C10N30/10;C10N40/08 |
主分类号 |
C10M107/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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