发明名称 |
PROCESS FOR THE PURIFICATION OF LOW MOLECULAR WEIGHT POLYHYDROXY COMPOUNDS |
摘要 |
<p>The invention is directed to a process for the purification of aqueous solutions of low molecular weight polyhydroxyl compounds containing calcium or lead compounds or mixtures thereof. Methanol and a precipitant for calcium and/or lead ions in a quantity equivalent to the ions to be removed are added to the solutions. The deposits thus formed are removed and the residual solutions are treated with a cation exchanger followed by distillation of the low-boiling fractions. The distillation sump which essentially contains the low molecular weight polyhydroxyl compounds is then treated with an anion exchanger.</p> |
申请公布号 |
EP0012907(B1) |
申请公布日期 |
1981.12.09 |
申请号 |
EP19790105043 |
申请日期 |
1979.12.10 |
申请人 |
BAYER AG |
发明人 |
KLINKMANN, KURT;WAMBACH, RAIMUND, DR. |
分类号 |
C07C27/00;C07C29/76;C07C29/88;C07C31/18;C07C67/00;(IPC1-7):07C29/88;07C31/18;07C29/76 |
主分类号 |
C07C27/00 |
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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