发明名称 |
Removal of impurities from n-methyl-pyrrolidone using highly pure water washed activated alumina |
摘要 |
N-methyl pyrrolidone solvent (hereinafter NMP) used to extract aromatic components from lubricating oil distillates is purified by contacting the solvent with activated alumina.
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申请公布号 |
US4837338(A) |
申请公布日期 |
1989.06.06 |
申请号 |
US19860874474 |
申请日期 |
1986.06.16 |
申请人 |
EXXON RESEARCH AND ENGINEERING COMPANY |
发明人 |
KRUPAY, BORDAN W.;REID, LLOYD E. |
分类号 |
B01D15/00;C07D207/267;C10G21/28;C10M177/00 |
主分类号 |
B01D15/00 |
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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