METHOD FOR PHOTODEHYDRATING DIMERIZATION OF TERTIARY BUTYL METHYL ETHER

摘要

PURPOSE:To obtain hydrogen and ethylene glycol di-tert-butyl ether in high selectivity in one stage by irradiating tert-butyl methyl ether with light in the presence of a group VIII metal complex and acetone. CONSTITUTION:tert-Butyl methyl ether is irradiated with light in the presence of a rhodium or osmium complex compound and acetone normally at 0-53 deg.C temperature in an inert gas atmosphere to afford hydrogen and ethylene glycol di-tert-buthyl ether. White light emitted from a high-pressure mercury lamp is applied to a light source for irradiation with light. Any light source capable of emitting ultraviolet rays other than 400nm can be optionally used. The above- mentioned complex compound is preferably used in an amount of 1X10<-4> to 1X10<-1>mol based on 1mol raw material.