发明名称 |
Countercurrent multi-stage water crystallization for aromatic compounds. |
摘要 |
<p>A process for the purification of an aromatic compound, e.g., isopropylidenediphenol, comprising using a multi-stage countercurrent process wherein the crystals are melted by the addition of heat and water prior to each crystallization step and wherein one crystallization is accomplished at a pre-selected low temperature.</p> |
申请公布号 |
EP0400171(B1) |
申请公布日期 |
1995.06.14 |
申请号 |
EP19890109779 |
申请日期 |
1989.05.30 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
ROBBINS, LANNY A.;GAMMILL, BEN B. |
分类号 |
C07C37/68;C07C37/84;C07C39/16;(IPC1-7):C07C37/84 |
主分类号 |
C07C37/68 |
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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