Patent
Composite membrane for reverse osmosis
TLDR
In this paper, a composite lumen-side feed reverse osmosis membrane and its preparation are disclosed, the membrane comprising a polymeric microporous-walled hollow fiber support with an interfacially-polymerized ultrathin semipermeable salt-rejecting layer engrafted on the lumen or bore of the hollow fiber.Abstract:
A composite lumen-side feed reverse osmosis membrane and its preparation are disclosed, the membrane comprising a polymeric microporous-walled hollow fiber support with an interfacially-polymerized ultrathin semipermeable salt-rejecting layer engrafted on the lumen or bore of the hollow fiber support, the support having walls that are substantially completely free of finger-like voids in excess of about 5 microns in the area of the wall adjacent the lumen. The preparation of the support comprises coaxially spin-casting (1) a fiber-forming solution containing a pore-forming material with (2) a lumen-forming fluid comprising from about 50 to about 70 vol % organic solvent in water.read more
Citations
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Patent
Desalination methods and systems that include carbonate compound precipitation
TL;DR: In this article, carbonate compound precipitation is used as a building material for desalination, and a precipitate product of the carbonate compounds precipitation conditions is employed as building material, e.g., a cement.
Journal ArticleDOI
Preparation and characterization of polypiperazine amide/PPESK hollow fiber composite nanofiltration membrane
TL;DR: In this article, a new hollow fiber composite nanofiltration membrane with high permeability was prepared by interfacial polymerization of piperazine (PIP) aqueous solution and trimesoyl chloride (TMC) hexane solution.
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Hollow fiber membranes and method of manufacture
TL;DR: An asymmetric microporous, hollow fiber membrane is made from a polymeric dope mixture of polysulfone and polyvinyl pyrrolidone dissolved in an aprotic solvent as discussed by the authors.
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Filtration membranes and method of making the same
TL;DR: Microporous membranes can be prepared which comprise a polymer which is a hydrophobic polymer in bulk form and which has an equilibrium water absorption from about 2% to about 4%, but is hydrophilic when precipitated as a membrane as discussed by the authors.
Journal ArticleDOI
Thin-film composite hollow fiber membranes: An optimized manufacturing method
TL;DR: In this article, a new technique for the preparation of composite hollow fibers membranes and the optimization of the preparation procedure are described, which leads to a drastically reduced number of imperfections in the selective layer.
References
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Patent
Multicomponent membranes for gas separations
TL;DR: In this article, the multicomponent membranes for gas separation are disclosed which are effective for separating at least one gas from gaseous mixtures by permeation wherein the multic-component membranes are comprised of a coating in occluding contact with a porous separation membrane.
Patent
Reverse osmosis membrane
TL;DR: A composite permselective membrane as discussed by the authors is prepared by reaction of a film or layer containing cycloaliphatic polyfunctional secondary amines with a triacyl halide or its mixture with a diacyl ion.
Patent
High flow membrane
TL;DR: In this article, the authors describe an "anisotropic high-fluctuation low-pressure" (HFL) and "an adaptive high-pressure low-pressurization" (LPLP) polyethylene (PE) polyester polypropylene (PE)-polyethylene polysilicon (PPS) polypropane (PPLA) MEMBRANE capable of being drained without loss of functionality.
Patent
Dialysis membrane and its use
TL;DR: In this article, the authors proposed an approach to simulate a DIALYZABLE LIQUID (SUCH AS BLOOD) to DIALYSIS by providing an ANISOTROPIS MICROPOROUS POLYSULFONE POLYMER MEMBRANE.