Patent ID: 7442236

Claim:
A Xenon External Recycling Unit (XERU), for recycling xenon from a gas mixture released by an Anaesthesia Gas Machine (AGM) using xenon as anaesthetic gas, comprising: a) a Selective Recovery System (SRS) that is connected to a vent relief valve of the AGM through a gas line that is able to collect the released gas mixture, provided that it has a minimum flow, a minimum xenon composition, and a pressure variation below a threshold value; wherein the SRS comprises: a shifting system for directing the gas mixture either to a storage or conditioning system, if said gas mixture contains a minimum threshold of xenon concentration, or otherwise to an output line; and a safety system that can override the normal operation of said Selective Recovery System (SRS) purging the gas mixture to the outside; b) a condensation removal system; c) a gas sterilization system; d) an adsorption-based System of Purification (SP), wherein said SP comprises at least one stage able to separate the xenon in said gas mixture with a selective adsorbent; e) a composition detector for analyzing the recycled xenon; and f) a Recycled Xenon Introduction System (RXIS) that feeds the Anaesthesia Gas Machine (AGM), provided that the recycled xenon has a minimum xenon composition.