Anesthetic gas reclamation system and method
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United States of America Patent
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Oct 6, 2009
Grant Date -
Nov 16, 2006
app pub date -
May 11, 2006
filing date -
May 13, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and system for the fractionation and removal of nitrous oxide and other volatile halocarbon gas components from waste anesthetic gases using liquid oxygen are disclosed. Liquid oxygen is warmed for use in a healthcare facility by cooling and condensing waste anesthetic gases. A cold trap/fractionator is provided wherein selective components of the waste anesthetic gas are collected as a frost on the coils of the cold trap/fractionator by desublimation/deposition and/or condensation/solidification. In a periodic batch process, the collected frost is first thawed and the melted liquids or gases are then collected at various increasing temperatures, thereby separating the nitrous oxide and other halocarbon gas components by their varying melting points. The thawed anesthetic components are collected in separate tanks based on their melting points. Warmed by the waste anesthetic gases in the cold trap/fractionator, the oxygen is supplied to the healthcare facility for its normal uses.
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