Kinetics of epoxidation of hexene-1 with isopropylbenzene hydroperoxide catalyzed by heteropolycompounds

A study was made on homogeneous epoxidation of hexene-1 with isopropyltenzene hydroperoxide (IPBHP) in isopropanol solution at 110 deg, with heteropolycompounds (HPC) as catalysts. The reaction proceeds with the selectivity with respect to hexene oxide, close to 100%. Kinetic equation is found W=k' [HPC]sup(P)x[IPBHP][Csub(6)Hsub(12)], where p=0.5-0.9 for the case of Na3PMO12O40 at [HPC]=(0.2 to 9)x10-5 mol/l. Catalytic HPC activity decreases in the Na3PMo12O4approximately AlPMo12O40 > Na4PMo11VO40 > Na4SiMo12O40 >> Na3PW12O40 series. The reaction mechanism including a partial HPC destruction with the formation of Mo glycol complexes as real epoxidation catalysts is supposed