Acrylic resin is widely used in construction, leather chemicals and other fields because of its low cost, good weather resistance and excellent film formation. However, its surface energy is high and its mechanical properties are poor, which limits its application. In order to improve this deficiency, acrylate was used as the main monomer, dodecafluoroheptyl methacrylate was used as a functional monomer, and trimethylolpropane triacrylate (TMPTA) was used as a crosslinking agent, the hydrophobic fluorinated acrylic resin was synthesized by a shell emulsion polymerization method. The reaction conditions were investigated. The stability and particle size of the emulsion as well as the tensile strength, hardness, hydrophobic angle, chemical structure and thermal stability of the emulsion film were characterized. The results indicate that the addition of TMPTA can effectively improve the tensile strength, hardness and thermal stability of the emulsion film. When TMPTA accounts for 2% of shell monomer mixture, the average particle size of the emulsion is 157.2 nm, and the conversion rate is 97.7%. The comprehensive performance of the emulsion film is best: the water absorption rate is 12.3%, and the decomposition temperature is 394 °C when the weight loss rate is 50%. The angle is 98.9°, the tensile strength is 3.5 MPa, and the hardness is 71.2 HA. Compared with the fluorine⁃containing acrylic resin, the tensile strength is increased by 159.2%, and the thermal stability can be improved by 34.6 °C.

Air injection low temperature oxidation reaction of heavy oil has been simulated in the highpressure reactor to study the oxidative mechanism of the reaction without or with catalyst. The before and after oxidation changes of oxygen content in tail gas and products of heavy oil were detected using TY3160type oxygen analyzer and NDJ4Atype potentiometric titrator, respectively. The results show that the using of transition metal salt as primary catalyst not only accelerates the oxidizing reaction, but also affects the selectivity of oxidation products. The addition of transition metal salt is helpful for the production of carboxylic acid, aldehyde and ketone, but reduces the production of alcohol. This research can provide the favorable theoretical basis for improving mining technology of air injection low temperature of heavy oil and further optimizing the design of catalyst.

Zinc-substituted aluminophosphate molecular sieves (ZnAPO-11) containing different zinc contents were synthesized using the gel composition n(R)/n(ZnO)/n(Al2O3)/n(P2O5)/n(H2O)=1∶ x∶y∶1.1∶80 (0.5x+y=1) by static hydrothermal method. As-synthesized ZnAPO-11 molecular sieves were characterized by XRD, SEM, N2-adsorption, MAS-NMR and ICP-AES techniques.The results show that ZnAPO-11 molecular sieves with AEL topology are prepared in the range of 0≤n(ZnO)/n(Al2O3)≤0.04. And resultant ZnAPO-11 molecular sieves are of high crystallinity and purity. A regular platelet morphology is observed for the as-synthesized ZnAPO-11 molecular sieves. Experimental data show that Zn as heteroatom is successfully incorporated into the framework of AlPO4-11 and substituted for Al. The n-hexane cracking over ZnAPO-11 was examined under different reaction conditions. It is found that ZnAPO-11 molecular sieves exhibited a significant activity for the n-hexane cracking at 475~550 ℃. Conversion level of n-hexane increased with increasing contact time, and the apparent rates increased with increasing reaction temperature.The first order was determined of the n-hexane concentration. In addition, the dependence of the rates on reaction temperature can be expressed in terms of Arrhenius formula in the whole cracking temperature range.