Abstract: PetroChina Sichuan Petrochemical Company Limited is the first large-scale refinery-chemical integration project built in the southwest of China. The construction was started in 2009, and good social benefit and economic benefit have been gained since it was completed and put into operation in early 2014. In order to give full play to the advantages of refinery-chemical integration, increase the production capacity of high value-added product and improve the profitability of the enterprise, technical modification was planned for some units during the 2018 overhaul to adjust product structure, adapt to market demand, and achieve a flexible process flow which produces the products based on feedstock properties.

Key words: refinery-chemical integration, process flow, structure optimization, high value-added product