Chemical precipitation method was applied in for separation and recovery of valuable metals molybdenum, vanadium and aluminum from alkaline V⁃Mo⁃Al solution. By the theoretical calculation and conditional experiments, the effects of precipitating agent dosage, temperature, pH value and deposition time on the precipitation separation of molybdenum and vanadium in alkaline solution were investigated detailedly. The results showed that when CaCl2 was used for vanadium precipitation, the reaction temperature was 80 ℃, the addition of CaCl2 was 1.1 times of the theoretical addition, the time was 1 h, and the pH was 12.9,over 95.3% of vanadium was precipitation recovered. When molybdenum was recovered by Ba(OH)2, under the optimum conditions of temperature 80 ℃, Ba(OH)2 dosage 1.1 times the stoichiometric amount, reaction time 60 min,the precipitation rate of molybdenum was up to 99.6%.

By means of Eulerian Model combined with Discrete Phase Model, the numerical simulation of three phases flow field in bubble enhanced hydrocyclone was performed to analyse the velocity distribution inside the hydrocyclone and the trajectories of oil droplet. The separation efficiency of hydrocyclone after bubble injection was compared with conventional hydrocyclone in different aspects such as partical size, flow rate and oil content in wastewater. The simulation result showed that tangential velocity and axial velocity inside the hydrocyclone after bubble injection were higher than that of conventional hydrocyclone, leading to a quicker escaping time of oil droplet. Meanwhile, bubble injection could increase the separation efficiency of oil droplet above 30 micron by 10% to 20%. The calculation confirmed that bubble injection at inlet could promote the separation performance of hydrocyclone in terms of numerical simulation.

A new diesel pour point depressant (PPD) was synthesized using αmethacrylic acid ester, maleic anhydride, and styrene as raw materials.The results showed that the optimum reaction conditions were as follows: the mass fraction of azodiisobutyronitrile (AIBN) was 0.8%, the mole ratio of αmethacrylic acid ester, maleic anhydride and styrene was 6∶1∶1, the reaction temperature was 80 ℃, and the reaction time was 8 h. Meanwhile, the effect of depressants was best when its mass fraction was 0.1%. At the same time, A, B, and C surface active agent were added into PPD according to the different proportion, respectively. It was found diesel pour point was decreased by 17 ℃ when PPD and B surfactant was compounded with mass ratio of 4∶1.

The qualitative and quantitative of sulfur forms in Middle East mixed crude oil AR were analyzed in a fixedbed hydrogenation reactor. The results illustrated that the total sulfur in hydrotreated residue reduced gradually with the depth of hydrotreating. 83.22% of sulfur in the residue was removed. Distribution of sulfur content in feed and products was increased with the increasing of temperature. Ultimately, in distillate(<350 ℃), sulfide sulfur and a majority of benzothiophenes were removed. Although the influence of steric hindrance existed, most of dibenzothiophenes was also removed.

The marine fuel was prepared from residual oil, the ethylene tar and the shale oil. The effects of harmonic ratio, the temperature, different hydrophilic lipophilic balance (HLB) and the compound surfactants exchange on the oil viscosity were studied. The experiment results show that when the m(residue)/m(ethylene) =1∶1.25 and m(tar residue)/m(shale oil)=1∶1.00 blend oil not only viscosity at 180# marine fuel oil products indicator, and the flash point and stability are in line with national standards. When add HLB=12 with anionic and non-ionic surfactant blend oil viscosity significantly reduced. When compound surfactant added at 0.3 persent, the viscosity to a minimum.

 Zn－SO ^2- ₄／SBA－15 composite material was prepared by manually grinding.ZnO and (NH ₄) ₂SO ₄ were highly dispersed in SBA-15.  Zn－SO ^2- ₄／SBA－15was characterized by means of XRD, nitrogen adsorption, IR and TG.The esults show that the prepared catalyst keep highly ordered mesoporous one-dimensional hexagonal structure．Acid strength on catalyst surface is in range of 2.8~3.3，acid content of 2.42 mmol/g, determined by means of Hammett indication method.Methyllaurate was synthesized from lauric acid and methanol over  Zn－SO ^2- ₄／SBA－15 as catalyst.The optimum conditions were determined by orthogonal experiment：molar ratio of lauric acid to methanol 1∶15，mass of the catalyst is 1.0 g， reaction time 10 h.The yield of methyllaurate can reach 85.4 %.The results show that the solid acid have higher catalytic activity.