Abstract: The characteristics of circular economy system based on the integration of petrochemical and salt chemical is discussed in depth, and the situations before and after the implementation of this project are analyzed. Adopting combined process to manufacture PVC, the ethylene in dry gas and the by-product hydrogen chloride all can be used, besides, the supply of electrolytic hydrogen is less. The improved chlorohydrine process for propylene oxide (PO) production can reduce the consumption of soda, seawater and propylene significantly; furthermore, the zero discharge of wastes from PO unit is realized. The comprehensive utilization of DCC dry gas and C4 resource can promote the added value of products. On the whole, by optimizing overall process planning and applying technology innovations, the objective goal of maximum utilization of various resources, less energy consumption and waste discharge could be reached.

Key words: circular economy, petrochemical and salt chemical integration, analysis, energy consumption, adjustment