Selective adsorption of halocarbon impurities containing cl, br and i in fluorocarbons or hydrofluorocarbons using adsorbent supported metal oxide
AssigneeAmerican Air Liquide, Inc.
InventorsAnup Doraiswamy, Nathan Stafford
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Abstract
Methods for purification of a fluorocarbon or hydrofluorocarbon containing at least one undesired halocarbon impurities comprise 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 supported on an adsorbent in an inert atmosphere.
Claims11
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.
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;
- regenerating the at least one adsorbent beds after the selective adsorption at a temperature ranging from 500° C. to 1000° C. with a purge gas containing either pure H2 or H2 in balance an inert gas selected from He, N2, Ar, Xe or Kr;
- and
- distilling an outlet stream of the at least one adsorption beds to obtain a purified fluorocarbon or hydrofluorocarbon.
Dependencies are inferred from the claim text.