Chemical Engineering Communications, Vol.190, No.5-8, 726-748, 2003
Highly effective ironporphyrin-immobilized catalytic systems for the processes of hydroxylation and epoxidation of lower alkanes and alkenes
The catalytic activity of the following samples in the hydroxylation reaction were studied: PPFe3+ OH/AlSiCr, PPFe3+ OH/AlSiMg, PPFe3+ OH/Al2O3 , and per-FTPhPFe3+ OH/Al2O3. PPFe3+ OH/AlSiMg-catalyzed methane hydroxylation yielded 46.5 wt% of methanol at a 48% methane conversion, at a maximum of 180degreesC. Per-FTPhPFe3+ OH/Al2O3 testing in propane hydroxylation by H2O2 yielded 39.3 mol% of isopropanol. Per-FTPhPFe3+ OH/Al2O3-catalyzed propylene oxidation by H2O2 yielded 30 mol% of propylene oxide. PPFe3+ OH/Al2O3-catalyzed propylene epoxidation yielded the following: the selectivity on the monooxygenase products is about 100%, the selectivity on propylene oxide - 59.2%, propylene conversion - 93.3%. The experimental research data revealed the fact that during the reaction of epoxidation per-FTPhPFe3+ OH/Al2O3 proved to be more stable under the influence of oxidizer and temperature than PPFe3+ OH/Al2O3.
Keywords:mimic;monooxygenase;catalase;peroxidase;cytochrome P-450;iron (III) perfluorotetraphenylporphyrin