Porphyrin Derivatives And Their Catalytic Oxidation Of P-xylene

P-Xylene as one of easily available raw petroleum materials, was mainly oxidized to terephthalic acid and p-toluic acid in industry. Environmental and economic presses, in the field of p-xylene oxidation, are forcing industry to develop new catalytic routes to produce more higher additional value products, p-tolualdehyde and p-toluoalcohol, exclusively employing cheap, clean and atom efficient oxidants such as O₂. Recently, extensive attention has been paid to metalloporhyrins, analogous complexes mimicing the behavior of cytochrome P-450 that can use dioxygen to functionalize hydrocarbons under ambient condtions.At first tetraphenylporphyrin with different substituting groups in benzene have been synthesized. Deuteroporphyrin IX dimethylester was prepared from hemin.On the base of synthesis of porphyrins, metalloporphyrins were prepared with metallic salt in solvent, Cobalt, Copper,Zinc and Nickel porphyrin were gained. Their structures had been demonstrated by IR,MS and ¹HNMR.The design and setting of the reaction equipment and analysis methods to the products were showed at first. The catalysis of CoTPP for the oxidation of P-Xylene into P-Methylbenzaldehyde and P-Methylbenzyl alcohol with air was taken for instance. The effects of various parameters, such as reaction temperature, pressure and concentration of catalyst and so on, were explored by means of serious experiments and the optimum conditions were obtained. We also introduced the results of the P-Xylene oxidations with air catalyzed respectively by porphyrin and Deuteroporphyrin IX dimethylester combined with different metals, and compared the catalytic activity.Finally we find that catalytic activity of Deuteroporphyrin IX dimethyleste is better than metalloporphyrins. Among all the metalloporphyrins catalyer, catalytic activity of CoTPP is the best.