Process for the preparation of epoxides from alkylene...

Details Process for the preparation of epoxides from alkylene... Process for the preparation of epoxides from alkylene...

C - Chemistry, Metallurgy

07

D

260/371.5

C07D 303/04 (2006.01) C07D 301/02 (2006.01)

Patent

CA 1162199

PROCESS FOR THE PREPARATION OF EPOXIDES FROM ALKYLENE CARBONATES ABSTRACT OF THE DISCLOSURE A homogeneous catalytic process for converting an alkylene carbonate to the corresponding epoxide wherein a liquid phase comprising said alkylene carbonate and a catalyst is heated at a temperature of from about 100°C to about 250°C to form a product mixture comprising said epoxide and carbon dioxide. The improvement comprises intro- ducing a continuous stream of inert gas into the liquid phase so as to remove-therefrom at least a portion of the product epoxide formed by said process thereby minimizing the formation of undesired aldehyde and/or ketone by-products. CROSS REFERENCE TO RELATED APPLICATION This application is related to copending application Canadian Serial No. 382,871 filed July 30, 1981, of Union Carbide Corporation, which is directed to a process for converting an alkylene carbonate to the corresponding epoxide under subatmospheric pressure to minimize the formation of aldehyde and/or ketone by-products. SPECIFICATION

382898

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