| abstract |
(57) [Summary] [Structure] An aqueous acrylamide solution obtained by a catalytic hydration method of acrylonitrile is contacted with a cation exchange resin and an anion exchange resin after adding ammonia and / or organic amines. To do. [Effects] According to this method, impurities, reaction by-products, metal ions, and the like contained in the crude acrylamide aqueous solution can be removed very well, and highly purified. It is also extremely advantageous in the production of acrylamide polymers. |