Propylene, chemical formula C3H6 is produced natural gas liquid and steam cracker refinery streams organic molecule. Chevron Phillips chemical propylene polyethylene, polypropylene, Alpha-olefins and uses internally to produce styrene and ethylene glycol antifreeze, and polyester, acrylic, polyvinyl chloride (PVC), propylene oxide, oxo alcohols such as isopropanol, and other materials that produce sells for external customers.