The major task for the Petroleum refineries in the very fast developing Country like us is to achieve maximum lighter distillates from gradually obtainable heavy and sour crudes maintaining the various stringent Environment Norms from time to time specially for the Transport fuels. As such the Petrochemicals are literally chemicals from Petroleum origin is hidden into the basic objective of the Refineries alongwith the exploration of the heavier Stocks from the bottom of the barrel. It also includes the optimum use of other equivalent Natural sources for ecofriendly products and development of low volume high priced value added products/chemicals.

The Science of petroleum refining and petrochemical Industries are very fluid and there are frequent changes in the technology, Policies and demands.

Keeping all these in mind, in this book the author has tried his best to collect informations on the Petrochemicals and compiled it for the Engineering students with a hope it will be helpful for faculty members as well Research scholars in this field.