直馏柴油催化氧化脱硫均相催化剂的制备与评价

Preparation and evaluation of desulfurization catalysts for homogeneous catalytic oxidation of straight-run diesel

Large investment, high operating cost and severe operation condition exist in the technology of diesel hydrodesulfurization,and the technology of H2O2 oxidative desulfurization of diesel has such problems as high oxidizer cost, oxidizer not regenerable, and treatment of sour water.A new catalytic oxidative desulfurization method for straight-run diesel is presented in this paper.In order to produce low-sulfur diesel, the sulfide in diesel oil was oxidized and converted into sulfone-polar sulfide with homogeneous catalysts and air oxidizer,and then removed by extractant.The homogenous catalysts were prepared by compound decomposition.The catalysts selected could dissolve in diesel at a given temperature and separate out at a lower temperature.The effects of catalytic oxidation of zinc benzoate, manganese benzoate and manganese phthalate were tested.The desulfurization effect of zinc benzoate and manganese benzoate was much better and the sulfur content of the desulfurized diesel met the standard of EuⅡdiesel （<300μg·g -1）.

Large investment, high operating cost and severe operation condition exist in the technology of diesel hydrodesulfurization, and the technology of H2O2 oxidative desulfurization of diesel has such problems as high oxidizer cost, oxidizer not regenerable, and treatment of sour water. A new catalytic oxidative desulfurization method for straight-run diesel is presented. In order to produce low-sulfur diesel, the sulfide in diesel oil was oxidized and converted into sulfone-polar sulfide with homogeneous catalysts and air oxidizer, and then removed by extractant. The homogenous catalysts were prepared by compound decomposition. The catalysts selected could dissolve in diesel at a given temperature and separate out at a lower temperature. The effects of catalytic oxidation of zinc benzoate, manganese benzoate and manganese phthalate were tested. The desulfurization effect of zinc benzoate and manganese benzoate was much better and the sulfur content of the desulfurized diesel met the standard of Eu II diesel (-1).