Abstract: The optimization of wax oil processing scheme using Processes Industry Modeling System (PIMS) software in SINOPEC Guangzhou Company was introduced. By estimating the maximum interest through shadow price, it was found that in the present high crude oil price stage, the interest of the integrated processing units could be increased by processing more purchased wax oil and selling more hydrocracked tail oil. Case study of various wax oil processing schemes showed that an optimal plan for the distribution of wax oils with various qualities to processing units having various capacities and functions could be obtained via PIMS modeling, thereby the economic benefit of the Company could be increased.

Key words: PIMS Model, wax oil processing, optimization, application