Patent ID: 6669760
Filing Date: 2003-12-30
Classification: B01D,Y02C,Y10S

Abstract:
In a process for removing C2F6 as an impurity from a CF4 containing gas, wherein the CF4 containing gas is contacted with an adsorbent in an adsorbent bed for selectively adsorbing C2F6, and the CF4 is recovered in the effluent from the adsorbent bed, the improvement which comprises the steps:contacting said CF4 containing gas, containing C2F6 impurity, with an adsorbent comprised of an activated carbon having a CCl4 activity from 43 to 55 in an adsorption bed to effect adsorption of said C2F6 impurity; and, recovering a purified CF4 product in the effluent from said adsorbent bed.