Patent ID: 6590112
Filing Date: 2003-07-08
Classification: C07D,Y02P

Abstract:
Continuous process for manufacturing an oxirane by continuous reaction in a reactor in the liquid phase in the presence of a solvent, at a temperature above 35Â° C. and for a period of more than 48 hours, of an olefin with a peroxide compound in the presence of a zeolite-based catalyst and in the presence of a salt, in which the catalyst undergoes no regeneration treatment, the rate of deactivation of the catalyst, expressed as being a percentage of the conversion of the peroxide compound lost per gram of oxirane produced per gram of zeolite determined-after establishing the reaction conditions, i.e. after the consumption of 2.5 mol of peroxide function per gram of catalyst, remains less than or equal to 0.15%, and in that a gaseous compound is introduced continuously into the reactor at a flow rate which is sufficient to entrain some of the oxirane produced, which is collected with gaseous compound at the place at which this gaseous compound leaves the reactor.