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    SEPARATION OF GASES VIA CARBONIZED VINYLIDENE CHLORIDE COPOLYMER GAS SEPARATION MEMBRANES AND PROCESSES THEREFOR
    2.
    发明申请
    SEPARATION OF GASES VIA CARBONIZED VINYLIDENE CHLORIDE COPOLYMER GAS SEPARATION MEMBRANES AND PROCESSES THEREFOR 审中-公开

    公开(公告)号：US20190076793A1

    公开(公告)日：2019-03-14

    申请号：US16085038

    申请日：2017-03-14

    申请人： Dow Global Technologies LLC

    发明人： Junqiang Liu ,  Douglas E. Beyer ,  Janet M. Goss ,  Chan Han ,  Edward M. Calverley

    IPC分类号： B01D71/30 ,  B01D71/02 ,  B01D69/02 ,  B01D67/00 ,  B01D53/22

    摘要： A process for separating hydrogen from a gas mixture having hydrogen and a larger gas molecule is comprised of flowing the gas mixture through a carbonized polyvinylidene chloride (PVDC) copolymer membrane having a hydrogen permeance in combination with a hydrogen/methane selectivity, wherein the combination of hydrogen permeance and hydrogen/methane selectivity is (i) at least 30 GPU hydrogen permeance and at least 200 hydrogen/methane selectivity or (ii) at least 10 GPU hydrogen permeance and at least 700 hydrogen/methane selectivity. The carbonized PVDC copolymer may be made by heating and restraining a polyvinylidene chloride copolymer film or hollow fiber having a thickness of 1 micrometer to 250 micrometers to a pretreatment temperature of 100° C. to 180° C. to form a pretreated polyvinylidene chloride copolymer film and then heating and restraining the pretreated polyvinylidene chloride copolymer film to a maximum pyrolysis temperature from 350° C. to 750° C.

    METHOD FOR MAKING POROUS MULLITE-CONTAINING COMPOSITES
    6.
    发明申请
    METHOD FOR MAKING POROUS MULLITE-CONTAINING COMPOSITES 有权
    制备多孔含镁复合材料的方法

    公开(公告)号：US20150011375A1

    公开(公告)日：2015-01-08

    申请号：US14492584

    申请日：2014-09-22

    申请人： DOW GLOBAL TECHNOLOGIES LLC

    发明人： Daniel Grohol ,  Chan Han ,  Aleksander J. Pyzik

    IPC分类号： C04B35/195 ,  C04B35/185

    CPC分类号： C04B35/195 ,  C04B35/185 ,  C04B41/5025 ,  C04B2235/3463 ,  C04B2235/3481

    摘要： Porous composites of mullite and cordierite are formed by firing an acicular mullite body in the presence of a magnesium source and a silicon source. In some variations of the process, the magnesium and silicon sources are present when the acicular mullite body is formed. In other variations, the magnesium source and the silicon source are applied to a previously-formed acicular mullite body. Surprisingly, the composites have coefficients of linear thermal expansion that are intermediate to those of mullite and cordierite alone, and have higher fracture strengths than cordierite at a similar porosity. Some of the cordierite forms at grain boundaries and/or points of intersection between mullite needles, rather than merely coating the needles. The presence of magnesium and silicon sources during acicular mullite formation does not significantly affect the ability to produce a highly porous network of mullite needles.

    摘要翻译： 莫来石和堇青石的多孔复合材料是通过在镁源和硅源的存在下焙烧针状莫来石体形成的。 在该方法的一些变型中，当形成针状莫来石体时，存在镁和硅源。 在其它变型中，将镁源和硅源施加到预先形成的针状莫来石体上。 令人惊奇的是，复合材料的线性热膨胀系数与莫来石和堇青石单体的中间相似，并且具有比类似孔隙率的堇青石更高的断裂强度。 在莫来石针之间的晶界和/或交叉点处的一些堇青石形式，而不仅仅是涂覆针。 在针状莫来石形成过程中镁和硅源的存在并不会显着影响产生莫来石针的高度多孔网络的能力。

    Vinylidene chloride copolymer-based carbon molecular sieve adsorbent compositions and processes therefor
    7.
    发明授权
    Vinylidene chloride copolymer-based carbon molecular sieve adsorbent compositions and processes therefor 有权

    公开(公告)号：US10239043B2

    公开(公告)日：2019-03-26

    申请号：US15320334

    申请日：2015-06-22

    申请人： Dow Global Technologies LLC

    发明人： Junqiang Liu ,  Douglas E. Beyer ,  Edward M. Calverley ,  Chan Han

    IPC分类号： B01D53/02 ,  B01J20/20 ,  B01J20/28 ,  B01J20/30 ,  B01D67/00 ,  B01D71/02 ,  C01B32/00 ,  C01B32/306 ,  C01B32/354 ,  B01D53/22 ,  B01D69/02 ,  B01D71/34

    摘要： Novel carbon molecular sieve (CMS) compositions comprising carbonized vinylidene chloride copolymer having micropores with an average micropore size ranging from 3.0 to 5.0. These materials offer capability in separations of gas mixtures including, for example, propane/propylene; nitrogen/methane; and ethane/ethylene. Such may be prepared by a process wherein vinylidene chloride copolymer beads, melt extruded film or fiber are pretreated to form a precursor that is finally carbonized at high temperature. Preselection or knowledge of precursor crystallinity and attained maximum pyrolysis temperature enables preselection or knowledge of a average micropore size, according to the equation ?=6.09+(0.0275×C)−(0.00233×T), wherein ? is the average micropore size in Angstroms, C is the crystallinity percentage and T is the attained maximum pyrolysis temperature in degrees Celsius, provided that crystallinity percentage ranges from 25 to 75 and temperature in degrees Celsius ranges from 800 to 1700. The beads, fibers or film may be ground, post-pyrolysis, and combined with a non-coating binder to form extruded pellets, or alternatively the fibers may be woven, either before or after pre-treatment, to form a woven fiber sheet which is thereafter pyrolyzed to form a woven fiber adsorbent.

    Carbon Molecular Sieve Adsorbents Prepared From Activated Carbon and Useful For Propylene-Propane Separation
    8.
    发明申请
    Carbon Molecular Sieve Adsorbents Prepared From Activated Carbon and Useful For Propylene-Propane Separation 审中-公开

    公开(公告)号：US20180280927A1

    公开(公告)日：2018-10-04

    申请号：US15764633

    申请日：2016-09-30

    申请人： Dow Global Technologies LLC

    发明人： Junqiang Liu ,  Chan Han ,  Janet M. Goss ,  Edward M. Calverley

    IPC分类号： B01J20/20 ,  B01J20/32 ,  B01J20/28 ,  B01J20/30

    摘要： A process to prepare a carbon molecular sieve adsorbent composition comprises steps beginning with an activated carbon having specific effective micropore size. The activated carbon is impregnated with monomers or partially polymerized polymer, allowed to complete polymerization, and then carbonized such that the impregnant shrinks the micropores to another specific effective micropore size. Finally, the impregnated/polymerized/carbonized product is annealed at a temperature ranging from 1000° C. to 1500° C., which ultimately and predictably shrinks the micropores to a size ranging from 4.0 Angstroms to 4.3 Angstroms. The invention surprisingly enables fine tuning of the effective micropore size, as well as desirable selectivity, capacity and adsorption rates, to obtain highly desirable carbon molecular sieving capability particularly suited for use in, for example, fixed beds in pressure swing or temperature swing processes to enable propylene/propane separations.

    Method for making porous mullite-containing composites
    10.
    发明授权
    Method for making porous mullite-containing composites 有权
    制造多孔莫来石复合材料的方法

    公开(公告)号：US09079798B2

    公开(公告)日：2015-07-14

    申请号：US14492584

    申请日：2014-09-22

    申请人： Dow Global Technologies LLC

    发明人： Daniel Grohol ,  Chan Han ,  Aleksander J. Pyzik

    IPC分类号： C04B35/00 ,  B01J21/00 ,  B01J21/04 ,  B01J20/00 ,  B01J23/02 ,  C04B35/195 ,  C04B35/185 ,  C04B41/50

    CPC分类号： C04B35/195 ,  C04B35/185 ,  C04B41/5025 ,  C04B2235/3463 ,  C04B2235/3481

    摘要： Porous composites of mullite and cordierite are formed by firing an acicular mullite body in the presence of a magnesium source and a silicon source. In some variations of the process, the magnesium and silicon sources are present when the acicular mullite body is formed. In other variations, the magnesium source and the silicon source are applied to a previously-formed acicular mullite body. Surprisingly, the composites have coefficients of linear thermal expansion that are intermediate to those of mullite and cordierite alone, and have higher fracture strengths than cordierite at a similar porosity. Some of the cordierite forms at grain boundaries and/or points of intersection between mullite needles, rather than merely coating the needles. The presence of magnesium and silicon sources during acicular mullite formation does not significantly affect the ability to produce a highly porous network of mullite needles.

    摘要翻译： 莫来石和堇青石的多孔复合材料是通过在镁源和硅源的存在下焙烧针状莫来石体形成的。 在该方法的一些变型中，当形成针状莫来石体时，存在镁和硅源。 在其它变型中，将镁源和硅源施加到预先形成的针状莫来石体上。 令人惊奇的是，复合材料的线性热膨胀系数与莫来石和堇青石单体的中间相似，并且具有比类似孔隙率的堇青石更高的断裂强度。 在莫来石针之间的晶界和/或交叉点处的一些堇青石形式，而不仅仅是涂覆针。 在针状莫来石形成过程中镁和硅源的存在并不会显着影响产生莫来石针的高度多孔网络的能力。