发明名称 |
A PROCESS FOR SEPARATING PROPYLENE GLYCOL FROM AQUEOUS COMPOSITIONS |
摘要 |
The present invention relates to a process for separating at least one propylene glycol from a mixture (M) comprising water and said propylene glycol, said process comprising (I) evaporating the mixture in at least two evaporation and/or distillation stages at decreasing operating pressures of the evaporators and/or distillation columns obtaining mixture (M') and mixture (M''); (II) separating the mixture (M') obtained in (I) in at least one further distillation step, obtaining a mixture (M-I) comprising at least 70 wt.-% of water and a mixture (M-II) comprising less than 30 wt.-% of water. |
申请公布号 |
KR20080091169(A) |
申请公布日期 |
2008.10.09 |
申请号 |
KR20087018534 |
申请日期 |
2006.12.13 |
申请人 |
BASF SE;THE DOW CHEMICAL COMPANY |
发明人 |
DIEFENBACHER ARMIN;GOEBBEL HANS GEORG;BITTERLICH STEFAN;VOSS HARTWIG;SCHULTZ HENNING;FORLIN ANNA;PATRASCU RENATE |
分类号 |
B01D1/26;B01D3/14 |
主分类号 |
B01D1/26 |
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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