Plastics – The raw material

Raw materials for the manufacture of plastics are natural compounds, such as cellulose, coal, petroleum and natural gas. In a refinery, petroleum is separated into several components by means of distillation. Grouped into evaporisation ranges, gas, benzene, petroleum, gaseous oil, and as residue bitumen are obtained during distillation.   All components consist of hydrocarbons which only differ in size and form of the molecules. The most important component for plastics production is crude benzene. In a heat cracking process this crude benzene is broken down into ethylene, propylene, butylene and other hydrocarbons and is then...