Process for removing lighter volatile impurities from gases
AssigneeMesser Griesheim GmbH
InventorsManfred Eschwey, Werner Schleser
Life of this patent
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Abstract
Lighter volative impurities are removed from gases by drawing the gas to be purified into a vacuum system. The gas to be purified deposits onto the cold surface of a condenser which is at cryogenic temperatures, while the lighter volatile impurities are continuously pulled out of the vacuum system in gaseous form.
Claims7
In a process for removing lighter volatile impurities from gases in order to obtain the gases in highly purified form, the improvement being in continuously feeding the gas to be purified into a condenser by means of a gas transfer pump communicating with the condenser, cooling a surface of the condenser at cryogenic temperatures between -100.degree. C. and -200.degree. C. on a cold surface of the condenser to which the gas is exposed, condensing the gas by means of the gas contacting the cold surface to form a deposit from the gas to be purified with the lighter volatile impurities remaining in gaseous form, and continuously withdrawing the lighter volatile impurities in gaseous form from the condenser.
Dependencies are inferred from the claim text.