Process for recovering dimethyl formyl amine from waste water using ion liquid extracting process |
Title： |
| Process for recovering dimethyl formyl amine from waste water using ion liquid extracting process |
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Application Number： |
200710062611 |
Application Date： |
2007/01/11 |
Announcement Date： |
2007/07/18 |
Pub. Date： |
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Publication Number： |
100999480 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C07C 231/24C07C 233/03C02F 1/26 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Yang Mingde, Wu Yulong, Dang Jie, Hu Husheng, Chen Zhen, Yang Guicheng |
Key Words： |
recovering, dimethyl formyl amine, waste water, ion liquid extracting |
Abstract： |
This invention relates to a method of using hydrophobicity ionic liquid as extractant to recycle dimethylformamide (DMF) in waste water. This ionic liquid can mix intensively with low density DMF(1-10wt%) at arbitrarily volume ratio''make DMF enriching in ionic liquid phase from water And the extraction phase ion liquid through reduction vaporization to steam out the DMF. The ion liquid is recycling. The extraction method of distribution ratio is greater than 2, when the two-phase volume ratio of 1:1, an extraction rate of more than 60%, also can use multi-cascade extraction to enhance the extraction rate. Ionic liquids difficult volatile, stable, the extraction process will basically wear and tear. In addition, the method is simple, non-emulsifying through extraction, stillness stratified fast, extraction process rapidly and significantly superior to the traditional method of solvent recover. |
Claim： |
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Priority： |
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PCT： |
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