Patent ID: 6733572
Filing Date: 2004-05-11
Classification: C07C,Y10S

Abstract:
A process for separating propylene and dimethylether from a mixture comprising propylene, dimethylether, and propane comprising the steps of:(a) passing the mixture through a bed of an adsorbent comprising a porous crystalline material having diffusion time constants for dimethylether and propylene of at least 0.1 secâˆ’1 when measured at a temperature of 373Â° K and dimethylether and propylene partial pressures of 8 kPa and having a diffusion time constant for propane measured at a temperature of 373Â° K and a propane partial pressure of 8 kPa less than 0.02 of said diffusion time constants for dimethylether and propylene; and then (b) desorbing the dimethylether and propylene from the bed.