Patent ID: 8143033

Claim:
A process for producing (meth)acrylamide, comprising: (a) a step of allowing (meth)acrylonitrile to undergo hydration reaction by the use of a microbial catalyst containing nitrile hydratase in an aqueous medium to obtain a (meth)acrylamide reaction solution (I), and (b) a step of removing impurities from the reaction solution (I) to obtain a (meth)acrylamide aqueous solution (II), wherein the concentration of (meth)acrylamide in the reaction solution (I) obtained in the step (a) is higher than the concentration of (meth)acrylamide in the aqueous solution (II) obtained in the step (b) by 2 to 20% by weight; wherein the (meth)acrylonitrile is acrylonitrile and the (meth)acrylamide is acrylamide; and the concentration of the acrylamide in the aqueous solution (II) is 40 to 60% by weight.