Abstract: The present invention is a bore-fed hollow fiber membrane device which possesses improved shellside countercurrent flow distribution. More specifically, the hollow fiber membrane bundle has a radial Peclet number of about 30 or lower which results in improved fluid recovery and productivity.

Abstract: Hollow fiber membranes can change dimensions upon drying or other processing creating leaks in tubesheets formed on fiber bundles. An adherent layer is formed in contact with an inner surface of each tubesheet and the fiber membranes therein in such a manner as to fill gaps formed between the hollow fiber membranes and each tubesheet during the drying or processing of the hollow fiber membranes and tubesheets. Preferably, the adherent layer is cast from a diglycidyl ether of bisphenol A containing an acrylo-nitrile-modified polyamine curing agent and the hollow fibers are cellulose ester.

Abstract: Disclosed is a process for sealing a hollow fiber membrane separation module into a case. The hollow fiber mambrane separation module is formed from a plurality of hollow fibers arranged in a bundle surrounding a core and having tube sheets surrounding each end of the bundle which bind the hollow fibers together. The disclosed process simultaneous with such sealing creates first and second spaces overlying the ends of the plurality of hollow fibers. Such first and second spaces, in cooperation, permit the introduction and withdrawal of fluids through the lumens of the hollow fibers.

Abstract: The invention is a hollow fiber membrane fluid separation device specially adapted for boreside feed which contains multiple concentric stages.

Abstract: The invention is a hollow fiber membrane fluid separation device specially adapted for boreside feed.

Abstract: The invention is a fluid separation module with improved permeate flow characteristics. Such modules comprise a hollow fiber bundle, two tubesheets, a tubesheet support which encircles the bundle and is contacted with the outer edge of the inside of both tubesheets, a feed inlet, a permeate outlet, a non-permeate outlet, a core, and one or more baffles for channeling flow, wherein the baffles for channeling flow have one end embedded in the second tubesheet and the second end placed at a short distance from the first tubesheet, with the distance between the end of the baffles for channeling flow and the first tubesheet being sufficient to allow the permeate stream flowing along the baffles for channeling flow to flow to the permeate outlet.

Abstract: This invention relates to a hollow fiber membrane device which can accommodate large changes in fiber dimension due to fiber swelling or contraction during operation.

Abstract: The invention is a method for separating one or more polar liquids from one or more non-polar liquids which comprises the following steps. First, contacting a mixture comprising one or more polar liquids and one or more non-polar liquids with one side of a membrane comprising a polymer of a perfluorosulfonic acid, or metal salt thereof, which is adapted for selective permeation of the polar liquids over the non-polar liquids under conditions such that the polar liquids selectively permeate through the membrane. Second, passing a desiccant fluid by, pulling a vacuum on, or a combination thereof, the other side of the membrane, under conditions such that the polar liquids which have permeated through the membrane are carried away from the membrane. Third, removing the fluid desiccant containing the permeated polar liquids or the permeated polar liquids wherein a vacuum is used, from the vicinity of the membrane. Fourth, removing the non-polar liquids from the vicinity of the membrane.

Abstract: The invention is a hollow fiber and tubesheet assembly which comprises(A) a non-random fiber bundle comprising water wet cellulose ester hollow fibers wherein the fiber is water wet when the assembly is fabricated, wherein any of said fibers processed using plasticizers have been leached to remove the plasticizer; and(B) a tubesheet which comprises the reaction product of:(i) an epoxy resin comprising about(a) between about 10 and 100 percent by weight of a diglycidyl ether of a dihydroxy benzene;(b) between about 0 and about 90 percent by weight of a polyglycidyl ether of a polyhydric phenol which is not a diglycidyl ether of dihydroxy benzene;(ii) a curing agent in sufficient amount to cure the epoxy resin composition;wherein a portion of the hollow fibers are embedded in the tubesheet.

Abstract: The hydrolyzable "chloride" contents of epoxides prepared from epihalohydrins and phenols, aromatic amines or >N-H group-containing heterocycles are considerably reduced by a second dehydrochlorination step which comprises dissolving the epoxide in a solvent having the characteristics of a 1:1 by weight blend of methylethylketone and toluene and treating it with amounts of base and water ensuring a final base concentration equivalent to that of about 4 wt. % aqueous NaOH.