method for preparation of aqueous solutions of acrylamide or concentrees methacrylamide by catalytic hydration of acrylonitrile or methacrylonitrile

摘要

By adding water to (meth)acrylonitrile there is formed a concentrated aqueous (meth)acrylamide solution, the addition being effected in the presence of a heterogeneous catalyst at elevated temperature and in aqueous (meth)acrylamide/(meth)acrylonitrile solution at an initial ratio of amide to nitrile of from 1:1 to 1:7.