Patent · US Expired

Preparation process of acrylamide from purified acrylonitrile

US5476883A · kind A · utility

7Cited by
11References
7Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 13, 1994
Grant dateDec 19, 1995
Priority date—
Expiry dateJul 13, 2014

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C231/065
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.