Acrylonitrile  is   produced  commercially   by propylene ammoxidation,  in which propylene,ammonia, and air are reacted by catalyst in  a  fluidized  bed. Acrylonitrile is  used   primarily   as   a co-monomer   in  the production of acrylic and modacrylic fibers. Uses include the  production of plastics, surface coatings, nitrile elastomers, barrier  resins, and adhesives. It is also a chemical intermediate in the synthesis  of various antioxidants, pharmaceuticals, dyes, and surface-active