The standard molar enthalpies of combustion, (298.15K), of high-carbon faaty alochols (tetradecanol, hexadecanol, stearyl alcohol) were obtained by a precise thermal isolation oxygen bomb calorimeter. The values obtained are, respectively, –(9126.39) kJ•mol-1, –(10446.15) kJ•mol-1, and –(11780.49) kJ•mol-1 for tetradecanol, hexadecanol, and stearyl alcohol. It was found that their standand molar enthlpies of combustion increase when the carbon number increases in the substances. There were also good agreement between the experimental and literature results for tetradecanol and tetradecanol. And the standard molar enthalpies of combustion of stearyl alcohol provided necessary thermodynamics basic data. Therefore, these data are available for the exploiting new synthesis method, engineering design and industry production on high-carbon alochols.
A novel hypercross-linked fiber which has an excellent adsorption capacity for cyclohexane vapor was prepared by cross-linking PP-ST-DVB fibers with p-xylylenedichloride according to the Friedel-Crafts reaction. The effects of several important factors on the Friedel-Crafts reaction, including reaction temperature, reaction time, catalyst type, and material ratio were investigated in detail and the optimal synthesis conditions of hypercross-linked fiber were obtained. The adsorption equilibrium for cyclohexane vapor on hypercross-linked fiber was measured by a static volumetric technique. The equilibrium measurements were performed at 298, 323 and 348 K and pressures of up to 6.04 kPa. The results can be well fitted by the Freundlich model. The isosteric heat curve was derived from the equilibrium data, and indicates that the hypercross-linked fiber has an energetically heterogeneous surface.
Novel catalysts with higher metal content were synthesized through the addition of a diamine. The catalysts showed excellent performances in the oxidation of cyclohexene and the higher metal content decreases the amount of the catalyst to be used, which are promising in industrial application.
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