Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element responds proportionally to a variable signal...
Patent
1988-11-25
1992-03-24
Chiesa, Richard L.
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element responds proportionally to a variable signal...
422222, 422305, B01J 702
Patent
active
050986643
ABSTRACT:
Apparatus for generating a pesticidal gas mixture of phosphine gas and air for fumigating an enclosed environment, e.g. a grain silo, with phosphine. Air, moisture content adjusted by drying or humidifying, is passed through a porous bed of aluminium phosphide or magnesium phosphide, preferably in a throw-a-way cartridge. The resulting mixture of air and phosphine gas is passed into the space. Typical humidities (which determines the phosphine concentration) are 4 g/m.sup.3 for "flow through" conditions or 12 g/m.sup.3 for "one shot" conditions of fumigation. The cartridge is fitted directly in sealing relationship between inlet and outlet adaptors to serve as the gas generator vessel of the apparatus. The cartridge, completely filled with metal phosphide in powder or granulate form, has cylindrical gas-tight side walls, flexible and stretchable to allow for expansion of the metal phosphide during hydrolysis, and porous end walls.
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patent: 4651463 (1987-03-01), Friemel
Muenzel Martin
Schellhaas Rainer
Chiesa Richard L.
Detia Freyberg GmbH
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