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    Isomer separation with highly fluorinated polymer membranes
    2.
    发明授权
    Isomer separation with highly fluorinated polymer membranes 有权

    公开(公告)号：US11058998B2

    公开(公告)日：2021-07-13

    申请号：US16551617

    申请日：2019-08-26

    申请人： COMPACT MEMBRANE SYSTEMS INC.

    发明人： Sudipto Majumdar ,  Robert Daniel Lousenberg

    IPC分类号： B01D71/32 ,  B01D71/58 ,  B01D69/12 ,  B01D61/00 ,  B01D61/36 ,  C08L27/18 ,  C08L37/00

    摘要： Separation of linear and branched alkane isomers via selective permeation through a composite membrane is disclosed. The separation layer in the composite membrane is fabricated from a blend of at least two different fluoropolymer compositions, A and B, in which composition A has a normal-alkane isomer permeability that is greater than composition B. Composition B has a normal alkane to branched-alkane isomer selectivity that is equal or greater than composition A. The separation layer in the composite membrane has a normal-alkane permeability that is greater than composition B and a normal-alkane to branched alkane isomer selectivity that is greater than composition A.

    HUMIDIFICATION AND SELECTIVE PERMEATION MODULE
    4.
    发明申请
    HUMIDIFICATION AND SELECTIVE PERMEATION MODULE 有权

    公开(公告)号：US20220379260A1

    公开(公告)日：2022-12-01

    申请号：US17772247

    申请日：2020-06-16

    申请人： COMPACT MEMBRANE SYSTEMS INC.

    发明人： SUDIPTO MAJUMDAR

    IPC分类号： B01D53/22 ,  B01D63/02 ,  B01D69/02 ,  C07C7/144

    摘要： A humidification and selective permeation module in which humidification of a gaseous feed stream and selective permeation of components in the gaseous feed stream using a facilitated-transport membrane occurs within the same unit operation is disclosed. A process for separation of components in a gaseous feed stream using the humidification and permeation module combines continuous humidification of the feed stream and selective permeation using the facilitated-transport membrane.

    Amorphous fluorinated copolymer gas separation membranes
    5.
    发明授权
    Amorphous fluorinated copolymer gas separation membranes 有权

    公开(公告)号：US10596527B2

    公开(公告)日：2020-03-24

    申请号：US15574408

    申请日：2016-06-10

    申请人： COMPACT MEMBRANE SYSTEMS, INC.

    发明人： Ning Shangguan ,  Andrew Edward Feiring ,  Sudipto Majumdar

    IPC分类号： B01D71/32 ,  B01D53/22 ,  C08F214/18 ,  C07C17/38 ,  B01D71/76 ,  B01D67/00 ,  B01D71/52

    摘要： Membranes having a permselective active layer of a copolymerized perfluorinated monomer and an non-fluorinated alkylvinylester monomer demonstrate superior selective permeability performance for separating gas mixtures compared to membranes of exclusively perfluorinated polymers. Preferred active layer compositions are copolymers of perfluoro-2,2-dimethyl-1,3 dioxole (PDD) copolymerized with an alkylvinyl ester such as vinyl acetate, and vinyl pivalate, and with alkylvinyl esters that are substantially hydrolyzed to provide copolymerized vinyl alcohol functionality. The membranes can have a thin, high diffusion rate, “gutter layer” of a fluorinated polymer highly permeable to nitrogen positioned between the active layer and a porous support layer. A novel copolymer effective in selectively permeable membranes is a copolymer of PDD and an alkylvinyl ester compound having the formula H2C═CHOC(O)R1 in which R1 is a linear or branched alkyl group of from 2 to 5 carbon atoms.

    PROCESS CONTROL FOR MEMBRANE-BASED SEPARATIONS
    6.
    发明公开
    PROCESS CONTROL FOR MEMBRANE-BASED SEPARATIONS 审中-公开

    公开(公告)号：US20240246032A1

    公开(公告)日：2024-07-25

    申请号：US18294993

    申请日：2022-08-02

    申请人： COMPACT MEMBRANE SYSTEMS, INC.

    发明人： Kenneth J. PENNISI ,  Kenneth Evan LOPRETE

    IPC分类号： B01D61/22 ,  B01D61/58

    CPC分类号： B01D61/22 ,  B01D61/58 ,  B01D2311/246

    摘要： Provided herein are systems and methods for controlling a membrane-based separation process. The systems and methods can comprise, by one or more computing devices: receiving a product concentration, which product is produced by a process comprising a membrane separation, which process is operated at a first set of operating conditions; optionally calculating a membrane performance parameter based at least in part on the first set of operating conditions; calculating a second set of operating conditions based at least in part on the membrane performance parameter and a model of the process, such that operation of the process at the second set of operating conditions is expected to produce the product within a desired concentration range; and communicating the second set of operating conditions to the process.

    GAS PERMEABLE FLUOROPOLYMERS AND IONOMERS
    7.
    发明申请
    GAS PERMEABLE FLUOROPOLYMERS AND IONOMERS 有权

    公开(公告)号：US20220315681A1

    公开(公告)日：2022-10-06

    申请号：US17640231

    申请日：2020-09-09

    申请人： Compact Membrane Systems, Inc.

    发明人： Robert Daniel Lousenberg ,  Andrew Edward Feiring

    IPC分类号： C08F216/14 ,  H01M8/1004 ,  B01D71/44

    摘要： Novel copolymers that are fluoropolymers including a first repeat unit that is fluorinated and cyclic and a second repeat unit from a trifluorovinyl methylene ether monomer having sulfur or sulfone functionality in the pendant group are disclosed. The copolymers have relatively high gas permeability as a result of a cyclic repeat unit in the copolymer backbone and ionomers from oxidation of the sulfur containing functionality are particularity useful in the cathode structure of a proton exchange membrane fuel cell.

    DURABLE MEMBRANES FOR SEPARATION OF SOLUTES FROM ORGANIC SOLVENTS
    8.
    发明申请
    DURABLE MEMBRANES FOR SEPARATION OF SOLUTES FROM ORGANIC SOLVENTS 有权

    公开(公告)号：US20210220780A1

    公开(公告)日：2021-07-22

    申请号：US15734029

    申请日：2019-01-14

    申请人： Compact Membrane Systems Inc.

    发明人： ROBERT D. LOUSENBERG ,  EVAN A. SOHODSKI ,  KENNETH J. PENNISI

    IPC分类号： B01D71/32 ,  B01D67/00 ,  B01D69/10 ,  B01D69/02 ,  B01D69/12

    摘要： This invention discloses a thin-film composite thin-film composite membrane that is useful for the separation of solute species in organic solvents and particularly in aggressive, high boiling-point, polar-aprotic solvents such as dimethylsulfoxide, (DMSO), N-Methyl-2-pyrrolidone (NMP), dimethylacetamide (DMAc), dimethylformamide (DMF). Thin-film composite separation performance and durability is greatly enhanced through electrostatic crosslinking of an ionomer selective layer by incorporation of a multi-valent counter-ion. The thin-film composite is resistant to contact with amines and the separation efficiency is tunable by choice of multi-valent counter-ion or through the applied pressure differential across the membrane.