Advances in Olefin Production Technology by Catalytic Cracking

Compared with conventional steam cracking,the technology of liquid feed catalytic cracking raises olefin yields while operating at lower temperatures,and expands the flexibility of products distribution.To substitute catalytic cracking for steam cracking has been the aim that people strive to reach.Recent development in catalytic cracking is reviewed in this paper.Various types of catalysts that are studied at present are introduced.Notable processes developed by Toyo Engineering,Asahi Chemical,Japan's National Inst.of Materials Chemical Research and Japan Chemical Industry Association and the All-Union Institute for Organic Synthesis in Russia are reviewed.Owing to shortage in supply and inferior quality of China's crude,the development of catalytic cracking technology is crucial to China.Heavy Oil Contact Cracking Process(HCC)and Catalytic Pyrolytic Process(CPP)developed respectively by Luoyang Petrochemical Engineering Company and The Research Institute of Petroleum Processing are introduced with emphasis.