Epoxidation process using molybdenum catalysts

Details Epoxidation process using molybdenum catalysts Epoxidation process using molybdenum catalysts

C - Chemistry, Metallurgy

07

D

260/372.3

C07D 301/19 (2006.01) C07D 303/04 (2006.01)

Patent

CA 1266053

IMPROVED EPOXIDATION PROCESS USING MOLYBDENUM CATALYSTS (D#80, 313-F) ABSTRACT OF THE DISCLOSURE A method of preparing an epoxide compound by re- acting an olefinically unsaturated compound with an organic hydroperoxide in the presence of a molybdenum catalyst is described. Selectivity to the epoxide is at least 96%, con- version of the hydroperoxide is at least 96%, yield to the epoxide is at least 94% and recovery of the catalyst is at least 90%. These excellent results are accomplished by using a molybdenum catalyst, such as a molybdenum complex of 2-ethyl-1-hexanol, at a concentration of 100 to 1000 ppm based on total charge, preferably 200 to 600 ppm. The mole ratio of olefinically unsaturated compound to organic hydro- peroxide is preferably in the range of 0.9:1 to 3.0:1 and the reaction temperature is preferably in the range of 50 to 180°C. It was further surprisingly discovered that the method of this invention works much better with t-butyl hydroperoxide as the organic hydroperoxide than with other hydroperoxides, such as cumene hydroperoxide.

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