| 发明名称 |
Process for purifying polycarboxylic acids |
| 摘要 |
Polycarboxylic acids are purified by contacting a crude polycarboxylic acid with a solvent to produce a substantially pure polycarboxylic acid. The solvent is chosen so that the impurities are soluble in the solvent and the polycarboxylic acid is insoluble in the solvent.
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| 申请公布号 |
US6376223(B1) |
申请公布日期 |
2002.04.23 |
| 申请号 |
US20000631398 |
申请日期 |
2000.08.03 |
| 申请人 |
COGNIS CORPORATION |
发明人 |
STALEY MICHAEL D. |
| 分类号 |
C07C51/43;C07C51/47;C07C51/48;(IPC1-7):C12P7/40 |
主分类号 |
C07C51/43 |
| 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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