he hydrogen desulfurization of four kinds of low-quality diesel oils using HPL-1 as was studied on a smallsized hydrogenation unit. The reaction kinetics and the effects of reaction temperature, reaction pressure, volume space velocity and volumetric hydrogen/oil ratio on desulfurization rate have been investigated. The results showed the optimal hydrodesulfurization condition as follows: reaction temperature 360 ℃, pressure 7.0 MPa, space velocity 1.0h^-1, and volumetric hydrogen/oil ratio 800:1. Under this condition, the lowquality diesel desulfurization rate can be reached up to 9657%. Moreover, a 0.5 order kinetic model for lowquality diesel was setabilished based on the factors of pressure, hydrogen/oil ratio and space velocity parameters correction. The results indicate that the experimental values and simulation values are in good coincide for four kinds of low-quality diesel sulfur content.

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.

Because of inherent characters of rubber materials, there exists some differences on antiswelling property of rubber materials in gasoline with different methanol volume fraction. Immersion tests in gasoline 93# or gasoline with different methanol proportions are conducted to show the antiswelling property of 3 rubber materials commonly used in motor vehicles. The results show that silicone rubber has better antiswelling property in gasoline with high methanol proportion; on the contrary, fluorine rubber has good resistance to swelling in low proportionmethanol gasoline; Nitrile Rubber has good antiswelling property in all gasoline with different proportion of methanol. 

The oxidation desulfurization and denitrification of coker gasoline were carried out with hydrogen peroxide as the oxidant, phosphorus tungsten acid as catalyst, cetyl trimethyl ammonium chloride as phase transfer catalysts and furfural as extracting agent. The desulfurization and denitrification rate can reach to 89.93% and 95.10% under the following conditions: gasoline 50 mL, catalyst 0.32 g, phase transfer catalyst 0.09 g, hydrogen peroxide 5 mL, oxidation temperature 70 ℃, oxidation time 60 min. The Oxidant Solution can be recycled when replenishing appropriate oxidant and phase transfer catalysts, and the extractant can also be recycled after treatment. Without phase transfer catalyst, the desulphurization and denitrification rate were only 77.35% and 91.98%, respectively. Therefore, phase transfer catalyst can greatly improve the desulfurization performance.

The paper studied several different volume fraction methanol gasoline’s low temperature anti-separate property and water anti-separate property and identified three different phase separation inhibitor. By changing the addition amount of phase separation inhibitor,the paper studied the methanol gasoline’s low temperature anti-separate property and water anti-separate property again,and compared the results with the raw methanol gasoline, found its optimum adding amount at the stable and uniform situation. So that it can meet the actual production requirements.The results show that the optimum adding amount is 4%(Volume).

 

The process of oxidation reactions and solvent extraction for coking diesel with hydrogen peroxide as an oxidant and methanol as the extractant was studied. The influences of the oxidants amount, reaction time, oxidation temperature, the ratio of oxidants to catalyst, the ratio of oil to extraction agent were investigated. The optimal operation conditions are as follows: reaction temperature 60 ℃，oxidation time 60 min，volume ratio of oxidants to diesel 0.1，formic acid as a catalyst，volume ratio of oxidants to catalyst 1.0; volume ratio of extraction to oil 1.0，extracting at room temperature for 20 min. The results show that the yield of diesel fuel is 93.0%，and the sulfur content of diesel can be reduced to less than 350 μg/g.