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    VACUUM-ASSISTED PROCESS FOR PREPARING AN ION-EXCHANGED ZEOLITE MEMBRANE
    1.
    发明申请
    VACUUM-ASSISTED PROCESS FOR PREPARING AN ION-EXCHANGED ZEOLITE MEMBRANE 审中-公开
    用于制备离子交换的沸石膜的真空辅助方法

    公开(公告)号：WO2014182430A1

    公开(公告)日：2014-11-13

    申请号：PCT/US2014/034891

    申请日：2014-04-22

    Applicant: DOW GLOBAL TECHNOLOGIES LLC ,  GEORGIA TECH RESEARCH CORPORATION

    Inventor： NAIR, Sankar ,  KIM, Seok Jhin ,  LIU, Yujun ,  PENDERGAST, John G. ,  DIXIT, Ravindra S. ,  MOORE, Jason S.

    IPC: B01D67/00 ,  B01J29/08 ,  B01J29/40 ,  B01J29/70 ,  B01D69/02 ,  B01D71/02 ,  B01J35/06 ,  C01B39/08

    CPC classification number: B01J35/065 ,  B01D67/0051 ,  B01D67/0093 ,  B01D69/02 ,  B01D71/028 ,  B01D2323/08 ,  B01D2323/10 ,  B01D2325/42 ,  B01J20/186 ,  B01J20/28035 ,  B01J20/3085 ,  B01J29/085 ,  B01J29/405 ,  B01J29/7053 ,  B01J2229/186 ,  C01B39/08 ,  C01B39/082 ,  C01B39/40

    Abstract: Effect ion-exchange of an alpha-alumina supported zeolite (e.g. a MFI zeolite, an LTA zeolite or a FAU zeolite)membrane, which process comprises: a) placing the membrane, which has a first surface and a spaced apart second surface, the first and second surfaces defining therebetween the membrane, in an ion exchange apparatus such that the first surface is in contact with an ion exchange solution and the second surface is in contact with a vapor space that is connected to a source of reduced pressure; b) actuating the source of reduced pressure to create a pressure differential between the first and second membrane surfaces of at least 0.4 atmosphere (0.405 x 10 5 pascals); and c) maintaining the pressure differential under ion exchange conditions for a period of time sufficient to effect exchange of an ion contained in the ion exchange solution with an ion in the zeolite membrane in an amount that is greater than an amount of ion exchange attained using an apparatus that places the second surface in contact with a liquid solvent that is at a pressure of at least one atmosphere (1.013 x 10 5 pascals) and the first surface in contact with the ion exchange solution at a pressure of at least two atmospheres (2.026 x 10 5 pascals) so as to establish a pressure differential between the two surfaces of at least one atmosphere (1.013 x 10 5 pascals), maintaining the pressure differential for the same period of time, and using the same ion exchange membrane, ion exchange solution and ion exchange temperature, the greater amount of ion exchange yielding an improved ion exchange membrane that a ratio of the ion that entered the membrane from the solution to the ion that left the membrane that is greater than that of the ion exchanged membrane prepared with the second surface in contact with the liquid solvent.

    Abstract translation: 影响α-氧化铝负载的沸石（例如MFI沸石，LTA沸石或FAU沸石）膜的离子交换，该方法包括：a）将具有第一表面和间隔开的第二表面的膜， 在离子交换装置中，使得第一表面与离子交换溶液接触并且第二表面与连接到减压源的蒸汽空间接触，在隔膜之间限定隔膜的第一和第二表面; b）致动减压源以在第一和第二膜表面之间产生至少0.4个大气压（0.405×105帕斯卡）的压力差; 和c）在离子交换条件下保持压差足以使离子交换溶液中包含的离子与沸石膜中的离子以大于使用的离子交换量进行交换的时间 使第二表面与处于至少一个气压（1.013×10 5帕斯卡）的压力的液体溶剂接触并且在至少两个大气压的压力下与离子交换溶液接触的第一表面（2.026 以便在至少一个气氛（1.013×105帕斯卡）的两个表面之间建立压力差，保持相同时间段的压力差，并使用相同的离子交换膜，离子交换溶液和 离子交换温度，更大量的离子交换产生改进的离子交换膜，即从溶液到离子的膜进入离子的比例 在离开膜处，该膜比用与液体溶剂接触的第二表面制备的离子交换膜的膜大。

    PROCESSES FOR PURIFYING GLYCOL ETHERS
    3.
    发明申请
    PROCESSES FOR PURIFYING GLYCOL ETHERS 审中-公开

    公开(公告)号：WO2022241689A1

    公开(公告)日：2022-11-24

    申请号：PCT/CN2021/094703

    申请日：2021-05-19

    Applicant: DOW GLOBAL TECHNOLOGIES LLC ,  JIANG, Qi ,  OHBA, Kaoru ,  LIU, Yujun

    Inventor： JIANG, Qi ,  OHBA, Kaoru ,  LIU, Yujun

    IPC: B01J41/07 ,  B01J41/12 ,  C08G65/30 ,  B01J39/07 ,  B01J39/05

    Abstract: A processes for purifying glycol ethers, comprises (a) providing a glycol ether to a first vessel, the glycol ether, the glycol ether having the following formula: R 1-O- (CHR 2CHR 3) O) nR 4; wherein R 1 is an alkyl group having 1 to 9 carbon atoms or a phenyl group; wherein R 2 and R 3 each individually is hydrogen, a methyl group or an ethyl group, provided that when R 3 is a methyl group or an ethyl group, R 2 is hydrogen and provided that when R 2 is a methyl group or an ethyl group, R 3 is hydrogen; wherein R 4 is hydrogen, an alkyl group having 1 to 4 carbon atoms, an acetyl group, or a propionyl group; and wherein n is an integer of 1 to 3; (b) filling the first vessel with inert gas; (c) heating the glycol ether in the first vessel to a sub-boiling temperature, wherein the sub-boiling temperature is at least 15℃ less than the normal boiling point of the glycol ether; (d) cooling the vapor from the first vessel in a second vessel to provide a liquid; and (e) contacting the glycol ether with a mixed bed of ion exchange resins comprising cationic exchange resins and anionic ion exchange resins.

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