Preparation process of acrylamide from purified acrylonitrile
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsTakeya Abe, Yoshihiko Kambara
Life of this patent
Estimating the term…
Abstract
This invention provides a process for the preparation of acrylamide. Acrylonitrile is treated through at least two purification steps in which acrylonitrile is brought into contact with a strongly-acidic cation exchange resin and then with a resin having primary and/or secondary amino groups or with activated carbon. The resulting acrylonitrile is subjected to hydration in the presence of a copper-base catalyst. The process of this invention can provide high-quality acrylamide even when acrylonitrile of ordinary quality is used, and permits preparation of a polyacrylamide suitable for use in the production of a coagulant having good water solubility or the like.
Claims7
A process for the preparation of acrylamide, which comprises (a) bringing acrylonitrile into contact with a strongly-acidic cation exchange resin and then with at least one of (i) a resin having primary and/or secondary amino groups and (ii) activated carbon, and thereafter (b) subjecting the resultant acrylonitrile to hydration in the presence of a copper-base catalyst.
Dependencies are inferred from the claim text.