Acrylonitrile (ACN) is used strictly as an intermediate. Propylene ammoxidation is currently the only commercial technology used to make ACN. BP Amoco practices and licenses this technology. Known as the Sohio process, it was developed in the 1950s by Standard Oil Company (Ohio), which became part of BP in 1987. Most of the world's production of acrylonitrile is based on this technology....