초록 ▼

Disclosed is a process for removing water vapor from water vapor-containing gases which is carried out by contacting with a feed gas mixture containing water vapor one side of a semi-permeable membrane selective to the passage of water vapor, maintaining a water vapor partial pressure differential a

Disclosed is a process for removing water vapor from water vapor-containing gases which is carried out by contacting with a feed gas mixture containing water vapor one side of a semi-permeable membrane selective to the passage of water vapor, maintaining a water vapor partial pressure differential across the membrane under conditions such that water vapor selectively permeates through the membrane from the higher pressure side to the lower pressure side of the membrane, contacting the opposite and lower pressure side of the membrane with a dry condensable sweep gas, and collecting and condensing the sweep gas containing permeated water, thereby causing separation of the sweep gas containing permeated water into an organic liquid phase and aqueous liquid phase.

대표청구항 ▼

A membrane process for removing water vapor from water vapor-containing gases, which process comprises: A. contacting with a feed gas mixture comprising at least one gas and water vapor, the higher pressure side of a semi-permeable membrane itself comprising at least one organic polymer having a hig

A membrane process for removing water vapor from water vapor-containing gases, which process comprises: A. contacting with a feed gas mixture comprising at least one gas and water vapor, the higher pressure side of a semi-permeable membrane itself comprising at least one organic polymer having a higher pressure side and lower pressure side, wherein said semi-permeable membrane is selectively permeable to water vapor; B. maintaining a water vapor partial pressure differential across said semi-permeable membrane under conditions such that water vapor selectively permeates through said semi-permeable membrane from said higher pressure side to said lower pressure side of said semi-permeable membrane; C. contacting said lower pressure side of said semi-permeable membrane with a substantially dry organic condensable sweep gas which has a different fluid composition by weight as compared to the wet feed gas mixture, at a sufficient volumetric flow rate relative to said feed gas mixture, whereby water vapor in said wet feed gas mixture selectively permeates through said semi-permeable membrane and into said sweep gas thereby producing a treated non-permeated gas stream and a separate permeated water vapor and condensable organic sweep gas stream; D. collecting and condensing said condensable organic sweep gas and permeated water vapor stream, thereby causing separation of the organic condensable sweep gas containing the permeate water vapor into an organic liquid phase and an aqueous liquid phase; and D′. withdrawing the treated non-permeate gas stream from the higher pressure side of the semipermeable membrane, which non-permeate gas stream is depleted in water vapor content as compared to the feed gas mixture.