| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a heat exchanger for carrying out condensation from being plugged in a step for condensing a mixed gas containing by-produced acetonitrile and hydrogen cyanide in a production process of (meth)acrylonitrile. <P>SOLUTION: The method for producing the (meth)acrylonitrile includes spraying an acid-containing liquid X to the interior of the heat exchanger 32 when extracting the mixed gas J from a separated gas after obtaining the separated gas by separating unreacted ammonia from an ammoxidation reaction gas obtained from an ammoxidation reaction step, and cooling and condensing the mixed gas J by the heat exchanger 32. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
