Sterilization with ethylene oxide

Details Sterilization with ethylene oxide Sterilization with ethylene oxide

A - Human Necessities

61

L

21/13

A61L 2/20 (2006.01) A23L 3/3409 (2006.01)

Patent

CA 2036831

P.F. 1679 ABSTRACT OF THE DISCLOSURE A method of treating an article with a mixture of ethylene oxide gas, air, and an inert gas which makes possible reuse of the ethylene oxide for an indefinite number of successive treatment cycles. The gas mixture is refortified with ethylene oxide when necessary. Nonflammability is maintained by removing air from the treatment tank before the mixture is admitted into the tank by the evacuation of the tank to a predetermined pressure, the admitting of an inert gas to the tank to a predetermined pressure, and the subsequent removal of the resulting air and inert gas mixture from the tank by evacuation to a predetermined pressure, the air removal resulting in an air proportion less than or equal to that proportion residing in the treatment mixture that is maintained in the holding tank.

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