| 摘要 |
An aqueous solution of acrylonitrile, obtained by dissolving in water the product of the reaction between C2H2 and HCN, is purified by enriching the solution with HCN to a content of 8-20% by weight based on acrylonitrile, and distilling; e.g. in a two-part vessel such that an acrylonitrile/water azeotrope distils from the first part to the second part, where low-boiling impurities are taken off and the azeotrope is condensed, collected and re-distilled (see Division |
