Pmodified HZSM5 catalysts were prepared by impregnation and used in the reaction of methanol to propylene as the catalyst. The effect of different phosphorous precursor amount on their catalyst characterization and catalytic performance is investigated. The results show that the amount of strong acid sites of phosphorus modified catalysts decreased, while that of weak acid sites increased. The increase of P loading with the range of 0% and 0.5% leads to the decrease of specific surface area and micropore volume, the increase of average pore size as well. However, there is no change in the framework and crystallinity. Compared with HZSM5, the stability of P/HZSM5 catalyst has been significantly improved, and the selectivity to propylene was significantly increased. And when the mass fraction of P is 0.25%, Propylene selectivity could be up to 54.6%.

In the new mixed solvent of waste lubricant regeneration research process, applied the orthogonal method, investigated the refined effect of the operating temperature, refining time, the ratio of oil to solvent, the amount of the second solvent added to (DMF), the amount of the auxiliary solvent (polyether2070) added to five factors in four different levels. The range analysis shows that the added amount of the DMF and polyether2070 are the key factors of influencing the yield, as the change of the amount of polyether 2070 added to has little effect on the viscosity index, while the volumic ratio of solvent to oil and the amount of DMF added to on the viscosity index of the big influence.Mean analysis shows that the best refining conditions of the solvent is for the temperature being 80 ℃, the refine time being 30 min, the volumic ratio of solvent to oil being 1.5∶1, the amount of DMF added to being 15%, polyether2070 added to being 0.2%. In the optimal experimental conditions, the total yield of renewable lubricant reaches 91.7%, its viscosity index reaches 108.8.