Petroleum oil processing generally refers to roughing

Petroleum oil processing generally refers to roughing , such as dehydration, desalination and other preliminary treatment , rarely involving chemical reactions , are generally physical nmb oil processing , this oil-producing industry in general in the vicinity , it should be raw directivity .
Petrochemical is the post-processing of oil , such as cracking , catalytic cracking and subsequent processing products such as propylene and other fine products should be market point type .
Petrochemical areas
  Chemical species to oil and gas production very much, a very wide range . The main raw materials for a variety of petrochemical and nmb oilfield equipment  oil fractions from petroleum refining process produces , as well as oil , natural gas and so on. Petroleum distillate ( mainly light oil ) by pyrolysis of hydrocarbons , can be prepared from cracked gas separation aromatics , ethylene, propylene , butadiene, and olefins such as benzene, toluene, xylene and the like , aromatic hydrocarbons derived from petroleum can also be a catalytic reforming light fraction . Light fractions of petroleum and natural gas by steam reforming , partial oxidation of heavy oil can be prepared via synthesis gas , and thus the production of ammonia , methanol synthesis .