Patent DE-102004033588-A1 (DE)
Title: Sorptive recovery of halogenated hydrocarbon from volatile inhalation anesthetic comprises temporarily removing and storing the hydrocarbon from the gas portion by microporous sorbent at the adsorption filter; and releasing
Inventor: STACH HELMUT
IPC: B01J20/20
Filed: 2004-07-06
Abstract: Sorptive recovery of halogenated hydrocarbon (I), preferably from volatile inhalation anesthetic from gas stream, comprises temporarily removing (I) from associated gas portion (preferably air) through an adsorptive coating at adsorption filter by means of microporous sorbents and storing; and releasing by desorptive regeneration for cleaning of process or exhausting air from an upstream separate arrangement. Sorptive recovery of halogenated hydrocarbon (I), preferably from volatile inhalation anesthetic from gas stream, comprises temporarily removing (I) from associated gas portion (preferably air) through an adsorptive coating at adsorption filter by means of microporous sorbents or by means of modified and/or dealuminated zeolite and stored; and releasing by desorptive regeneration for cleaning of process or exhausting air from an upstream separate arrangement, in which these gas portions are formed by repatriation of the gas forming potions, where: (a) during the process at least three filter beds are parallely arranged and at least one first filter bed is found in the loading area, which in a first time period with one first volumetric flow rate that flow through the inlet of supply air containing (I) (particularly by expiring gas from an anesthesia process) and at least a further filter bed is found in the regenerating arrangement, where partial regeneration occurs simultaneously; (b) in a second time period a further through a second filter bed in adsorption mechanism is flown that with a second (having different size of the first quantity)flow of air containing homogenous hydrocarbon from anesthesia process and loaded and at least a third filter bed is arranged in the regenerating arrangement, where partial regeneration occurs simultaneously; (c1) in the third period, loading of the second filter bed (with maximal load capacity at that time) with the exhausting second mass flow takes place; (c2) in the third time period, at least a third filter bed is loaded with the same mass stream and at least a first filter bed simultaneously progress to partial regeneration process; (d) in the fourth time period, the process is terminated and desorption results under complete regeneration of all the filter beds, where (e) both the loading and regeneration takes place via a common flow drive for two coupled together circulation results and both in a filter bed absorption and desorption from the filter bed the liquefiable gas portion is condensed together and are collected together. An independent claim is also included for a device, for carrying the method and for processing an adsorptive recuperation of halogenated hydrocarbon and other volatile organic compounds of gas stream, preferably for volatile inhalation anesthetics, comprising three adsorption filters (1, 1', 1'') over the common exhaust (2), the condenser (3), the collector (4), the adapter (5) (with a separate device for the production of the gas mixtures and for the feedback of cleaned exhaust air it is connected to the three adsorption filters) over the air supply valve (10) and the air supply line (11), the bypass (15) and the exhaust valve (16) connected to the exhaust, the air exchanging valve (12) connected to the condenser on one side and on the other side a desorbing line (20) is connected to the adsorption filters and upstream valves (30, 31, 32), which are led into the air removing line (13) at the adapter, the condenser has circulating lines (17, 18) at its top, where these over the circulating valve (14) and the inlet valves (40, 41, 42) within the adsorbing line (19) are lead and partly flow into the adsorption filters, the valves shows clasps (43) and preferably for volatile inhalation anesthetics, the condenser over the collector is connected to liquid outlet (50) and the return line (51) with the adapter.