Multi-stage vent filter

Details Multi-stage vent filter Multi-stage vent filter

1997-08-20

1999-04-06

Smith, Duane S.

Gas separation: apparatus

Solid sorbent apparatus

Plural diverse separating means

553854, 55482, 55504, 55505, B01D 4600, B01D 5304

Patent

active

058912231

ABSTRACT:
A vent filter assembly for use with containers containing hazardous chemical or radioactive waste, the assembly having a first stage attached to the container having a first filter media, preferably sintered steel, which allows unaltered passage of pure gas but which blocks passage of particulate matter, and a second stage removably attached to the first stage, the second stage allowing passage of gas but blocking passage of particulate matter and volatile organic solvents. Removal of the second stage from the first stage allows a pure sample of gas to be drawn through the first stage, whereupon the second stage can be reattached to the first stage to provide the required filtering of volatile organic solvents.

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