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US 8,506,815 B2Granted
Removal of water from fluids
AssigneeCms Technologies Holdings, Inc.
InventorsStuart M. Nemser, Sudipto Majumdar, Kenneth J. Pennisi
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AssigneeCms Technologies Holdings, Inc.
InventorsStuart M. Nemser, Sudipto Majumdar, Kenneth J. Pennisi
Estimating the term…
A method of removing water from fluid mixtures of the water with other compounds uses selective vapor permeation or pervaporation of the water, as the case may be, from the mixture through a membrane having an amorphous perfluoropolymer selectively permeable layer. The novel process can be applied in such exemplary embodiments as (a) removing water from mixtures of compounds that have relative volatility of about 1-1.1 or that form azeotropic mixtures with water, (b) the dehydration of hydrocarbon oil such as hydraulic fluid to concentrations of water less than about 50 ppm, (c) removing water byproduct of reversible chemical equilibrium reactions to favor high conversion of reactants to desirable products, (d) drying ethanol to less than 0.5 wt. % water as can be used in fuel for internal combustion engines, and (e) controlling the water content to optimum concentration in enzyme-catalyzed chemical reactions carried out in organic media.
A method of removing water from a feed composition comprising a product component and water, the method comprising the steps of (i) providing a membrane separation system comprising at least one membrane comprising a selectively permeable layer comprising a polymer or copolymer of perfluoro-2,2-dimethyl-1,3-dioxole, (ii) contacting the membrane with the feed composition in which the water is present at an initial concentration, (iii) permeating the feed composition through said membrane in which the water transfers through said membrane preferentially relative to the product component, thereby selectively removing water from the feed composition, and (iv) recovering from said membrane separation system a product composition comprising the water at a final concentration substantially lower than the initial concentration
A method of removing water from a feed composition comprising a product component and water, the method comprising the step of permeating the feed composition through a selectively permeable membrane comprising a nonporous layer of a polymer or copolymer of perfluoro-2,2-dimethyl-1,3-dioxole, in a membrane separation process selected from the group consisting of vapor permeation, pervaporation and a combination thereof and being exclusive of mechanisms other than a membrane separation process for removing water from the feed composition,
Dependencies are inferred from the claim text.