Modern Petrochemicals Ali El-Shekeil, Professor of Chemistry, Sana'a University, Yemen The modern petrochemical industry is a universal key industry. Petroleum supplied a great starting material that is characterized by cheap price, availability in huge quantities, ease of transport, diversity of products and uses besides the production of many feedstocks for the petrochemical industries. The petrochemical products reached all the applications of the modern citizen to the extent that it seems impossible to imagine living without them. They dominated all aspects of civilized life including...