Reaction extraction process of refining glyoxalic acid |
Title： |
| Reaction extraction process of refining glyoxalic acid |
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Application Number： |
01131114 |
Application Date： |
2001/08/31 |
Announcement Date： |
2002/02/13 |
Pub. Date： |
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Publication Number： |
1335295 |
Announcement Number： |
1141288 |
Grant Date： |
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Granted Pub. Date： |
2004-3-10 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C07C 51/48, C07C 59/147 |
Applicant(s)： |
Qinghua Univ. |
Inventor(s)： |
Qin Wei, Cao Yanqing, Dai Youyuan |
Key Words： |
Reaction extraction process, refine, glyoxalic acid |
Abstract： |
The present invention relates to one kind of reaction extraction process of refining glyoxalic acid. After extracting agent is prepared, coarse glyoxalic acid is refined through multistage extraction process with the extracting agent at normal temperature and the organic phase with enriched solute is collected and water backwashed. Finally, the water washed liquid is collected and evaporating concentrated to obtain high-concentration and high-purity glyoxalic acid product. The process of the present invention may be used to eliminate oxalic acid, glycolic acid and color impurity to raise the quality of the product. |
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 Relevancy information |
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| Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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