发明名称 |
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.
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申请公布号 |
US8197645(B2) |
申请公布日期 |
2012.06.12 |
申请号 |
US20060159321 |
申请日期 |
2006.12.13 |
申请人 |
DIEFENBACHER ARMIN;GOEBBEL HANS-GEORG;BITTERLICH STEFAN;VOSS HARTWIG;SCHULTZ HENNING;FORLIN ANNA;PATRASCU RENATE;BASF AKTIENGESELLSCHAFT;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;C07C29/80;C07C31/18 |
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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