Method for preparing acrylamide crystal
Title：
Method for preparing acrylamide crystal
Application Number：
 200710122048
Application Date：
 2007/09/20
Announcement Date：
 2008/03/19
Pub. Date：
Publication Number：
 101143831
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 C07C 233/03, C07C 231/24
Applicant(s)：
 Tsinghua University
Inventor(s)：
 Yu Huimin, Shen Zhongyao
Key Words：
 preparing method, acrylamide crystal
Abstract：
 The invention discloses a preparation method of acrylamide crystal, which belongs to the biochemical field. After being filtered, the condensed high-temperature acrylamide water solution coming from a condensation column is cooled down via a double-stage cascaded heat exchanger, the first stage applies circulating water for cooling, the second stage applies low-temperature acrylamide crystallization mother solution for cooling, and a high-efficiency heat exchanger can be applied. After being cooled down, the condensed high-temperature acrylamide water solution enters into a stiring type jacketed crystallization kettle with a tapered bottom for being cooled down and crystallized, and magma is centrifugally dehydrated by a double-stage pushing centrifuge and dried by a multi-stage vibrating fluidized bed, so that a acrylamide crystal with water content less than one percent is obtained. The invention has the advantages of high production efficiency, good quality of products, low energy consumption and good operational environment.
Claim：
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PCT：
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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
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