Patent ID: 8153091

Claim:
A method to retrieve xenon of purity over 99% from samples that contain approximately 0.1˜1 vol % xenon and at least fluorocarbon, characterized by processing operations including at least the following processing steps of said samples: (A 1 ) adsorption and removal of trifluoromethane that is a type of said fluorocarbon, using an adsorbent; (A 2 ) removal of fluorocarbon having saturated bond that is a type of said fluorocarbon and concentration of xenon using gas separation membranes; (A 3 ) adsorption and retrieval of said xenon using an adsorbent and separation of xenon from said adsorbent; and (A 4 ) Removal of fluorocarbon having unsaturated bond, that is a type of said fluorocarbon using a reactant.