Industrial acrylonitrile is produced by catalytic ammoxidation of propylene, also known as the Sohio process.
In the Sohio process, propylene, ammonia, and air (oxidizer) are passed through a fluidized bed reactor containing the catalyst at 400–510 °C and 50–200 kPa. The reactants pass through the reactor only once, before being quenched in aqueous sulfuric acid. Excess propylene, carbon monoxide, carbon dioxide, and dinitrogen that do not dissolve are vented directly to the atmosphere, or are incinerate.
References
http://www.epa.gov/chemfact/acry-sd.txt
A. Tullo. "A Solvent Dries Up". Chemical & Engineering News 86: 27. doi:10.1021/cen-v086n047.p027
Attached file is my earlier publication for production of the monomer Acrylnitrile, PAN will be prepared by the polymerization of acrylonitrile. PAN is produced by several companies amongs them SOHIO