Chemical apparatus and process disinfecting – deodorizing – preser – Elements or adjuncts
Patent
1989-10-26
1993-04-13
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Elements or adjuncts
34 57A, 222152, 222442, 422139, 422145, 423DIG16, G01F 1128
Patent
active
052020991
ABSTRACT:
An apparatus and process for maintaining the purity of solid/granular product and dispensing high purity granular product from a vessel. A noncontaminating surface is provided by a cup, cylinder, or other structure having a surface of silicon, silicon carbide, silicon nitride, sialon, or similar materials and preferably operates as an angle of repose valve in a pressurized system to prevent contamination by undue contact of the high purity product with conventional gastight valves such as ball valves, butterfly valves, pinch valves, etc.
REFERENCES:
patent: 1458341 (1923-06-01), Herbert
patent: 2316814 (1943-04-01), Schemm
patent: 3411666 (1968-11-01), Schmeling
patent: 4187169 (1980-02-01), Euzen et al.
The Condensed Chemical Dictionary, 8th Ed., Van Nostrand Reinhold Co., New York, 1971, pp. 746, 755 and 783-785.
Blank Wesley D.
Boone James E.
Farritor Robert E.
Owens David W.
Eck Steven R.
Ethyl Corporation
Santiago Amala L.
Warden Robert J.
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