Patent ID: 7594955

Claim:
A process for recovering a rare gas in a rare gas-containing exhaust gas from an equipment using said rare gas, the process comprising the steps of: Step 1: removing one or more interfering gases contained in said exhaust gas; Step 2: introducing, with pressure, the resulting exhaust gas into an air-tight gas-recovering container containing activated carbon which adsorbs said rare gas, said gas-recovering container having a joint section connectable to a gas duct through an on-off valve, thereby recovering, in said gas-recovering container, the rare gas-containing exhaust gas; and Step 3: introducing the thus recovered rare gas-containing exhaust gas into an equipment for purifying said rare gas by decreasing pressure in said gas-recovering container; wherein Step 1 occurs before Step 2 or after Step 3, or both, and Step 1 occurs by a harmful component removal means for removing interfering gases contained in the exhaust gas; the harmful component removal means includes a catalyst decomposition method, a plasma decomposition method, and an adsorption method; and the harmful component means can be used singly or in combination.