This manuscript reported the acylation of cyclohexanol with acetic anhydride catalyzed by Y-β composite zeolite supported phosphotungstic acid（H3PW12O40/Y-β）. The effect of different factors such as the amount of catalyst，the ratio of cyclohexanol to acetic anhydride and reaction time on the yield of cyclohexyl acetate were systematically studied. The results show that Y-β composite zeolite supported phosphotungstic acid has a good catalytic activity. The best of reaction condition is found out as follows: the amount of acetic anhydride is 0.1 mol, the ratio of cyclohexanol to acetic anhydride is 1.1, and the catalyst is 0.60 g. The yield of cyclohexyl acetate reached 93.4% within 45 min. The catalyst can be repeatedly used for 5 times without obvious loss of its activity. The product was characterized by refractive index and IR.

2-Phenyl-2,3-dihydro-1H-perimidine was prepared from 1,8-naphthalenediamin and benzaldehyde was studied by using vitamin B1 as catalysts, using ethanol as the reaction solvent, and then characterized by MP and IR. The effects of reaction temperature, stirring time, the amount of catalysts and the mole ratio of reactants on the yields of 2-Phenyl-2,3-dihydro-1H-perimidine were investigated. The results show that the yield of 2-Phenyl-2,3-dihydro-1H-perimidine can reach 91.4%, under the following optimal conditions: electromagnetic stirring 0.1 mol 1,8-naphthalenediamin, the mass fraction of vitamin B1 0.8%, molar ratio of benzaldehyde to 1,8-naphthalenediamin 1.2∶1, temperature 30 ℃ and reaction time 15 min. This demonstrated that vitamin B1 had good catalytic activity. 

 

 

 

hermal decomposition behaviours of no woody biomass (straw) and waste plastic (agricultural film) were investigated using TGA．The results showe that the biomass is decomposed at a wider temperature range than plastics, and the transfer efficiency of biomass is lowest because of the high content of ash and fixcarbon．It is exhibited significant synergistic effect created more the light component between biomass and plastic during co-pyrolysis. The kinetic analysis indicates that the pyrolytic processes can be described as first order reactions model, a quite good fitting of experimental data was obtained for all samples studied．The only plastic can be described as the one model, and the only biomass be described as the two consecutive models, than the biomass/plastic co-pyrolysis need be described as the four consecutive models. The activation energies were found to be in the rang of 64.6 ~ 306.6 kJ/mol, and the pre-exponential factors were 1.1×104～3.0×1022. 

The catalyst neodymium trifluoroacetate was prepared and characterized with qualitative analysis, then the acetalization of benzylaldehyde and ethylene glycol was studied with neodymium trifluoroacetate as a catalyst. The effect of reaction time, the molar ratio of benzylaldehyde to ethylene glycol, the amount of catalyst and water-carrying agent on the yield of benzylaldehyde ethylene glycol acetal was investigated. The results show that the optimal conditions for the reaction are as follows: benzylaldehyde/ethylene glycol molar ratio 1.1, the amount of catalyst 0.3 g, cyclohexane as a deaquation reagent 8 mL, reaction time 2.5 h, the yield of acetal could reach 87.6%.

The acylation of tert-butanol with acetic anhydride was studied by using polyaniline doped with iodine as catalysts. The effects of reaction temperature, time, the mass fraction of catalysts and molar ratio of acetic anhydride to tert-butanol on the yields of tert-butyl acetate were investigated. The experiment results shows that polyaniline doped with iodine has a good catalytic activity. The optimum reaction conditions for this reaction are a molar ratio of 1∶1 of acetic anhydride to tert-butanol, the mass fraction of polyaniline doped with iodine 7.0%, 55 ℃ for 6 h. At this time, the yield of tert-butyl acetate is 87.6%. The product is colorless and transparent and characterized by IR.