Abstract: The operation status of the 350 kt/a naphtha non-hydroupgranding unit in SINOPEC Qingdao Refining & Chemical Company was introduced and analyzed with using various feedstocks. It was found that when the price of naphtha was cheaper than that of gasoline, the economic effect of the unit was significant. Optimization of the catalyst regeneration process was carried out to shorten the coke burning time of the catalyst. Results showed that the coke burning time of a single reactor could be shortened 96-120 h by revamping, resulting in a 7.1% increase of production capacity, and the energy consumption of the unit reduced 1 906~2 859 GJ/a.

Key words: non-hydroupgranding, naphtha, yield, catalyst, coke burning, optimization