Method and apparatus for providing sterilized cryogenic liquids

Details Method and apparatus for providing sterilized cryogenic liquids Method and apparatus for providing sterilized cryogenic liquids

1985-03-04

1986-11-04

Lacey, David L.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Using direct contact with electrical or electromagnetic...

422 1, 62 52, 62 54, 62 78, 426399, 210774, A61L 210

Patent

active

046209620

ABSTRACT:
The invention includes a method and apparatus for providing a sterilized cryogenic liquid. A cryogenic liquid is vaporized, and the resulting gas is sterilized. The sterilized gas is then reliquefied and subcooled. The liquid is vaporized by passing the liquid through a heat exchanger, heat being transferred from the previously sterilized gas to the incoming liquid. Sterilization is accomplished either by passing the gas through a microporous filter, or by subjecting the gas to ultraviolet radiation. The sterilized gas, after passing through the heat exchanger, is directed into a pressurized container, wherein the gas is reliquefied and subcooled. The subcooled liquid is then withdrawn from the apparatus.

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patent: 4242875 (1981-01-01), Schaefer
patent: 4510760 (1985-04-01), Wieland

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