B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 11/00 (2006.01) B01D 11/04 (2006.01) B01J 19/00 (2006.01) B01J 19/12 (2006.01) H05B 6/64 (2006.01) H05B 6/68 (2006.01) H05B 6/80 (2006.01) G01N 1/40 (2006.01) G01N 1/44 (2006.01)
Patent
CA 2124514
An explosion proof microwave heated solvent extraction apparatus or system for extracting organic materials includes a pressure resistant microwave transmissive extraction container, which is preferably of reinforced polyetherimide lined with fluoropolymer, in a microwave radiation heated chamber, with means for controlling a microwave radiation generating means, such as a magnetron, in response to the presence of any solvent vapor in a collection container for rupture diaphragm discharged material from an extraction container or in exhaust gas from the chamber. The presence of the solvent in the collection container or exhaust gas is preferably detected by a semi-conductor gas sensor which decreases its electrical resistance in the presence of solvent vapors, thereby increasing its voltage and thus controlling operation of the magnetron, turning it off when solvent vapor (and a potentially explosive gas mixture) is present. Also described are other explosion prevention means, including a fluoropolymer sheet covering a chamber ceiling and ceiling light, and a process for safely extracting organic materials, utilizing the described apparatus.
Cem Corporation
Sim & Mcburney
LandOfFree
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