US 12,083,493 B2
Selective adsorption of halocarbon impurities containing cl, br and i in fluorocarbons or hydrofluorocarbons using adsorbent supported metal oxide
Anup Doraiswamy, Bear, DE (US); and Nathan Stafford, Damascus, OR (US)
Assigned to American Air Liquide, Inc., Fremont, CA (US)
Filed by American Air Liquide, Inc., Fremont, CA (US)
Filed on Mar. 4, 2021, as Appl. No. 17/192,421.
Prior Publication US 2022/0280908 A1, Sep. 8, 2022
Int. Cl. B01J 20/08 (2006.01); B01D 3/14 (2006.01); B01D 3/36 (2006.01); B01D 53/04 (2006.01); B01D 53/82 (2006.01); B01D 53/96 (2006.01); B01J 20/34 (2006.01); C07C 17/38 (2006.01); C07C 17/383 (2006.01); C07C 17/389 (2006.01)
CPC B01J 20/08 (2013.01) [B01D 3/143 (2013.01); B01D 3/36 (2013.01); B01D 53/04 (2013.01); B01D 53/82 (2013.01); B01D 53/96 (2013.01); B01J 20/3458 (2013.01); C07C 17/383 (2013.01); C07C 17/389 (2013.01); B01D 2253/104 (2013.01); B01D 2253/1124 (2013.01); B01D 2253/25 (2013.01); B01D 2256/26 (2013.01); B01D 2257/2064 (2013.01); B01D 2257/2066 (2013.01); B01D 2259/40086 (2013.01); B01D 2259/4009 (2013.01); B01J 2220/56 (2013.01); B01J 2220/58 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A process for purification of a fluorocarbon or hydrofluorocarbon containing at least one undesired halocarbon impurities, comprising:
flowing the fluorocarbon or hydrofluorocarbon through at least one adsorbent beds to selectively adsorb the at least one undesired halocarbon impurities through physical adsorption and/or chemical adsorption, wherein the at least one adsorbent beds contain a metal oxide MgO supported on an adsorbent in an inert atmosphere; and
regenerating the at least one adsorbent beds after the selective adsorption at a temperature ranging from 500° C. to 1000° C. with continuously flowing a purge gas through the at least one adsorbent beds, wherein the purge gas is either pure H2 or H2 in balance an inert gas selected from He, N2, Ar, Xe or Kr.