As a refining-chemical integration optimization project, Maoming Petrochemical is building a new 100,000-ton/year MTBE unit based on the existing MTBE/butene unit of its chemical division. The unit adopts the proprietary tubular external circulation with catalytic distillation technology independently developed by Sinopec(5.02, 0.09, 1.83%). After the unit is completed and put into operation, Maoming Petrochemical's annual MTBE production capacity will exceed 200,000 tons, becoming a new profit growth point for the company.

　　The unit involves an investment of about 81.31 million yuan and consists of two sections: MTBE production and C4 dehydrocarbonization. Using surplus butane/butene raffinate and isobutylene-rich C4 as feedstock, the unit produces high value-added products such as MTBE and provides feedstock for the isononyl alcohol unit to be built later.