| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide in a production process of acrylonitrile, a new method capable of achieving stabilization of product quality and decrease of an acrylonitrile production process load by stabilizing a hydrocyanic acid-removing dehydration column. <P>SOLUTION: There is provided a purification method for acrylonitrile, comprising a step of distilling a solution containing acrylonitrile, hydrogen cyanide and water, by using a distillation system comprising a distillation column, and a condenser for the distillate gas and connected with the distillation column, wherein, the method comprises a step of calculating the removal heat amount of the condenser based on the heat balance of the distillation system to control the condenser. <P>COPYRIGHT: (C)2012,JPO&INPIT |
