Method and Apparatus for Corrosive Gas Purification

Abstract

Herein is disclosed a method and an apparatus for preparing a highly purified gas from a crude liquid comprising the gas and one or more of a metal, particulates, water vapor, or a volatile impurity. The method comprises: (a) vaporizing the crude liquid, to yield (i) a first vapor stream comprising the gas and (ii) a first liquid stream comprising the gas; (b) removing water vapor, particulates, or both from the first vapor stream, to yield a second vapor stream comprising the gas; (c) condensing the second vapor stream, to yield a second liquid stream comprising the gas; and (d) sparging the second liquid stream with an inert gas, to yield (i) a third vapor stream comprising the gas and (ii) a third liquid stream comprising the highly purified gas. Also disclosed is a method for preparing an adsorbent to effectively remove water vapor from the gas, as well as an adsorbent so prepared.

1 . A highly purified gas, prepared from a crude liquid comprising the gas and one or more of a metal, particulates, water vapor, or a volatile impurity, by a method comprising: 
 vaporizing the crude liquid, to yield (i) a first vapor stream comprising the gas and (ii) a first liquid stream comprising the gas;    removing water vapor, particulates, or both from the first vapor stream, to yield a second vapor stream comprising the gas;    condensing the second vapor stream, to yield a second liquid stream comprising the gas; and    sparging the second liquid stream with an inert gas, to yield (i) a third vapor stream comprising the gas and (ii) a third liquid stream comprising the highly purified gas.    
   
   
       2 . The highly purified gas of  claim 1 , wherein the gas comprises Cl 2 , Br 2 , F 2 , HCl, HF, or HBr.  
   
   
       3 . The highly purified gas of  claim 2 , wherein the gas comprises Cl 2 .  
   
   
       4 . The highly purified gas of  claim 1 , wherein the method further comprises: 
 condensing the third vapor stream, to yield (i) a fourth vapor stream comprising the inert gas and (ii) a fourth liquid stream comprising the gas;    scrubbing the fourth vapor stream, to yield a fifth vapor stream; and    recycling the fourth liquid stream to the sparging step.