| 发明名称 |
PURIFICATION OF DIPHENYL PHTHALATES |
| 摘要 |
Color properties of crude phenolic esters of aromatic dicarboxylic acids are improved by comminuting the ester to a finely divided particle size in the presence of an aqueous or alcoholic alkali solution and thereafter distilling the esters to obtain phenolic esters of reduced color. |
| 申请公布号 |
CA1309688(C) |
申请公布日期 |
1992.11.03 |
| 申请号 |
CA19880573706 |
申请日期 |
1988.08.03 |
| 申请人 |
HOECHST CELANESE CORPORATION |
发明人 |
STAUTZENBERGER, ADIN L. |
| 分类号 |
C07C69/80;C07C67/48;C07C67/54;C07C67/60;C07C69/83 |
主分类号 |
C07C69/80 |
| 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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