SEPARATION OF OLEFINS FROM OLEFINS/PARAFFINS MIXED GAS

摘要

A method for separating a C4 olefin from a mixture gas comprising C4 olefin and paraffin, and its apparatus are provided to minimize the concentration of isobutane in a C4 olefin and to increase the concentration of a C4 olefin. A method for separating a C4 olefin from a mixture gas comprising C4 olefin and paraffin comprises the steps of introducing a mixture gas comprising C4 olefin and paraffin into an adsorption tower to adsorb an olefin to separate paraffin and a desorbing agent; introducing some of the high purity C4 olefin into an adsorption tower to wash out a small amount of the paraffin adsorbed together with an olefin to increase the purity of olefin; and introducing a desorbing agent to the adsorption tower to desorb and separate an olefin, wherein the continuous adsorption, washing and desorption are carried out at three adsorption towers.