发明名称 |
Solvent extraction of lubricating oils. |
摘要 |
<p>A lubricating oil stock is extracted with N-methyl-2-pyrrolidone to yield a primary raffinate useful as a high VI lubricating base oil and a primary extract. The primary extract is mixed with antisolvent and chilled to yield a secondary raffinate. This secondary raffinate is sufficiently reduced in aromatics that it is solvent extracted to yield medium to high VI lubricating base oil.</p> |
申请公布号 |
EP0430444(A1) |
申请公布日期 |
1991.06.05 |
申请号 |
EP19900311903 |
申请日期 |
1990.10.30 |
申请人 |
TEXACO DEVELOPMENT CORPORATION |
发明人 |
SEQUEIRA, AVILINO, JR. |
分类号 |
C10G21/16;C10G21/00;C10G21/02;C10G21/20;C10G50/02;C10G53/06;C10G71/00;C10M101/02;C10N30/02 |
主分类号 |
C10G21/16 |
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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