Patent ID: 8012241

Claim:
A method of condensing ozone gas comprising the steps of: acting ozone-oxygen mixture gas on an adsorbing cylinder ( 2 ) which is filled in its interior area with an adsorbent ( 1 ), so as to selectively adsorb the ozone gas to the adsorbent ( 1 ); and desorbing the selectively adsorbed ozone gas to condense and purify the ozone gas, characterized by acting the ozone-oxygen mixture gas to the adsorbent ( 1 ) in non-cooled state so as to selectively adsorb the ozone gas to the adsorbent ( 1 ); vacuuming the adsorbing cylinder ( 2 ) by a vacuum pump ( 11 ) on performing the ozone-gas desorption operation to desorb the ozone gas from the adsorbent ( 1 ); and feeding thus desorbed purified ozone gas from the adsorbing cylinder ( 2 ) to a buffer tank ( 12 ) arranged on a downstream side of the vacuum pump ( 11 ) so as to uniformize a concentration of the purified ozone gas.