Supported hydrophilic membrane
First Claim
1. A supported membrane for separating water from a water and hydrocarbon and/or halogenated hydrocarbon mixture, said membrane comprising porous support means (12) forming a first layer for structurally supporting said membrane thereon, said porous support means (12) including two sides (14,16) and a plurality of pores (18) extending therethrough providing fluid communication between said two sides (14,16);
- and characterized by a nonporous water and water soluble substance permeating membrane (20) supported by said porous support means over each of said pores (18) for selectively permeating only water and water soluble substances through each of said pores (18) from the mixture and enabling a thinner layer of said nonporous membrane over each of said pores and supported sufficient to withstand increased pressures resulting in improved efficiencies of water flow across said membrane.
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Accused Products
Abstract
A supported composite membrane (10) includes a porous support membrane (12) forming a first layer for structurally supporting a second membrane thereon. The porous support membrane (12) includes two sides (14,16) and a plurality of pores (18) extending therethrough providing fluid communication between the two sides (14,16). A nonporous water and water soluble substance permeating membrane (20) is disposed over each of the pores (18) for selectively permeating only water and water soluble substances through each of the pores (18). A method of making the membrane (10) includes the steps of forming a porous support material (12) into a first layer, and adhering a nonporous water and water soluble substance permeating membrane (20) over each of the pores (18) for selectively permeating only water and water soluble substances through each of the pores (18).
19 Citations
13 Claims
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1. A supported membrane for separating water from a water and hydrocarbon and/or halogenated hydrocarbon mixture, said membrane comprising porous support means (12) forming a first layer for structurally supporting said membrane thereon, said porous support means (12) including two sides (14,16) and a plurality of pores (18) extending therethrough providing fluid communication between said two sides (14,16);
- and characterized by a nonporous water and water soluble substance permeating membrane (20) supported by said porous support means over each of said pores (18) for selectively permeating only water and water soluble substances through each of said pores (18) from the mixture and enabling a thinner layer of said nonporous membrane over each of said pores and supported sufficient to withstand increased pressures resulting in improved efficiencies of water flow across said membrane.
- View Dependent Claims (2, 3, 4, 5)
- 6. A method comprising making a supported membrane (10) having properties for separating water from water and hydrocarbon and/or halogenated hydrocarbon mixtures by forming a porous support material (12) into a first layer, the first layer including two sides (14,16) and a plurality of pores (18) extending therethrough providing fluid communication between the two sides (14,16) and adhering a nonporous water and water soluble substance permeating membrane (20) to said porous support material enabling a thinner layer of said nonporous membrane to withstand increased pressures resulting in improved efficiencies of water flow across said membrane.
Specification