发明名称 |
Natural cresylic acid processing. |
摘要 |
A discrete impure cresylic acid distillate fraction derived by fractional distillation of a natural cresylic acid feedstock from which tar bases and/or neutral oils have not been removed is subjected to extractive distillation with a polyhydric alcohol extractant and subsequent separation of the discrete cresylic acid fraction. The extractive distillation removes tar bases, neutral oils, undesirable phenolic substances,sulfur compounds, color- forming impurities and odor-imparting impurities.
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申请公布号 |
EP0545814(A1) |
申请公布日期 |
1993.06.09 |
申请号 |
EP19920403256 |
申请日期 |
1992.12.02 |
申请人 |
DAKOTA GASIFICATION COMPANY |
发明人 |
DUNCAN, DAVID;BAKER, GENE;MAAS, DANA;MOHL, KEVIN;TODD, ROBERT |
分类号 |
C10G53/04;C07C37/74;C07C37/80 |
主分类号 |
C10G53/04 |
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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