Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1986-10-10
1988-01-12
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55 68, B01D 5322
Patent
active
047189215
ABSTRACT:
A water vapor-containing gas is separated to a fraction thereof having an increased content of water vapor and a remaining fraction thereof having a decreased content of water vapor by a gas separating device which has at least one gas separating membrane having gas feed and delivery surfaces and a ratio P.sub.H.sbsb.2.sub.O /P.sub.CH.sbsb.4 of water vapor-permeating rate P.sub.H.sbsb.2.sub.O to methane gas permeating rate P.sub.CH.sbsb.4 of 200 or more, and preferably, made by an aromatic imide polymer, in such a manner that (1) a water vapor-containing feed gas is fed to a feed side of the gas separating device; (2) the feed gas is flowed along the gas feed surface of the gas separating membrane to allow a fraction of the feed gas to permeate through the gas separating membrane; (3) a drying gas containing 300 ppm or less of water vapor is fed to a delivery side of the gas separating device; (4) the fed drying gas is flowed along the delivery surface of the gas separating membrane to promote the permeation of water vapor through the gas separating membrane; (5) the permeated gas fraction is collected together with the flowed drying gas at the delivery side of the gas separating device; and (6) a remaining gas fraction not permeated through the gas separating membrane and having a decreased content of water vapor is recovered from the feed side of the gas separating device.
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Makino Hiroshi
Nakagawa Kanji
Spitzer Robert
Ube Industries Ltd.
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