公开(公告)号：US20210138407A1

公开(公告)日：2021-05-13

申请号：US16621433

申请日：2018-04-12

Applicant: Dow Global Technologies LLC

Inventor： Junqiang Liu ,  Janet M. Goss ,  Stephanie K. Anderson

IPC: B01D69/10 ,  B01D69/12 ,  B01D71/02 ,  B01D71/30

Abstract: A supported carbon molecular sieve (CMS) membrane is made by contacting a film of a carbon forming polymer on a polymer textile to form a laminate. The laminate is then heated to a temperature for a time under an atmosphere sufficient to carbonize the film and polymer textile to form the supported CMS membrane. The supported CMS membrane formed is a laminate having a carbon separating layer graphitically bonded to a carbon textile, wherein the carbon separating layer is a continuous film. The supported CMS membranes are particularly useful for separating gases such as olefins from their corresponding paraffins.

公开(公告)号：US10646849B2

公开(公告)日：2020-05-12

申请号：US15764633

申请日：2016-09-08

Applicant: Dow Global Technologies LLC

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

IPC: B01J20/20 ,  B01J20/30 ,  B01J20/32 ,  B01J20/28 ,  C01B32/306 ,  C01B32/05 ,  B01D53/04 ,  B01D53/047 ,  B01D53/02

Abstract: 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.

公开(公告)号：US20190083939A1

公开(公告)日：2019-03-21

申请号：US16085039

申请日：2017-03-14

Applicant: Dow Global Technologies LLC

Inventor： Junqiang Liu ,  Janet M. Goss ,  Edward M. Calverley ,  Douglas E. Beyer

IPC: B01D69/02 ,  B01D67/00 ,  B01D71/02 ,  B01D71/80 ,  B01D53/22

Abstract: A carbonized PVDC copolymer useful for the separation of an olefin from its corresponding paraffin may be made by heating a polyvinylidene chloride copolymer film or hollow fiber having a thickness of 1 micrometer to 20 micrometers to a pretreatment temperature of 100° C. to 180° C. to form a pretreated polyvinylidene chloride copolymer film and then heating the pretreated polyvinylidene chloride copolymer film to a maximum pyrolysis temperature from 350° C. to 750° C. A process for separating an olefin from its corresponding paraffin in a gas mixture is comprised of flowing the gas mixture through the aforementioned carbonized polyvinylidene chloride (PVDC) copolymer to produce a permeate first stream having an increased concentration of the olefin and a second retentate stream having an increased concentration of its corresponding paraffin.

公开(公告)号：US20190076793A1

公开(公告)日：2019-03-14

申请号：US16085038

申请日：2017-03-14

Applicant: Dow Global Technologies LLC

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

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

Abstract: 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.

公开(公告)号：US20160008787A1

公开(公告)日：2016-01-14

申请号：US14763855

申请日：2014-03-24

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Junqiang Liu ,  Mark K. Brayden ,  Edward M. Calverley ,  Steven R. Lakso ,  Yujun Liu ,  Marcos V. Martinez

IPC: B01J20/20 ,  B01J20/28 ,  C07C7/12 ,  B01J20/30

CPC classification number: B01J20/20 ,  B01D53/0462 ,  B01D53/047 ,  B01D2253/102 ,  B01D2253/116 ,  B01D2253/304 ,  B01D2257/7022 ,  B01J20/28042 ,  B01J20/28078 ,  B01J20/28085 ,  B01J20/28092 ,  B01J20/3007 ,  B01J20/3028 ,  B01J20/3042 ,  B01J20/3078 ,  C01B32/00 ,  C01B32/05 ,  C01B32/30 ,  C01P2004/54 ,  C01P2004/60 ,  C01P2006/16 ,  C01P2006/17 ,  C07C7/12

Abstract: A novel microporous carbon molecular sieve may be used as the basis for carbon adsorbent pellets that have discrete areas of carbonized binder and of carbonized precursor, macropores having an average pore diameter greater than or equal to 1 micrometer and a total macroporosity of at least 30 percent, both as measured by mercury porosimetry, and micropores that are capable of selectively admitting a C2-C3 alkene and excluding a C2-C3 alkane, and a total microporosity ranging from 10 percent to 30 percent. The pellets may be prepared by pyrolyzing a pellet structure comprising a carbon forming, non-melting binder and a non-porous gel type sulfonated polystyrene precursor at a temperature ranging from 500° C. to 1000° C., under an inert atmosphere and other conditions suitable to form the described pellets. The pellets are particularly useful in pressure swing and temperature swing adsorption processes to separate C2-C3 alkane/alkene mixtures.

Abstract translation: 可以使用新颖的微孔碳分子筛作为具有碳化粘合剂和碳化前体的离散区域的碳吸附剂颗粒的基础，大孔的平均孔径大于或等于1微米，总的大孔隙率至少为30％ ，通过水银孔率法测量，以及能够选择性地引入C2-C3烯烃并排除C2-C3烷烃的微孔，以及总微孔率为10％至30％的微孔。 颗粒可以通过在惰性气氛下在500℃至1000℃的温度下热解包含碳形成，非熔融粘合剂和无孔凝胶型磺化聚苯乙烯前体的颗粒结构来制备，其它 适于形成所述丸剂的条件。 颗粒在用于分离C 2 -C 3烷烃/烯烃混合物的压力摆动和变温吸附方法中特别有用。

公开(公告)号：US11931697B2

公开(公告)日：2024-03-19

申请号：US17231358

申请日：2021-04-15

Applicant: Dow Global Technologies LLC

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

IPC: B01D69/02 ,  B01D53/22 ,  B01D67/00 ,  B01D71/02 ,  B01D71/30 ,  B01D71/80 ,  B01D69/08 ,  B01D71/40 ,  B01D71/42

CPC classification number: B01D69/02 ,  B01D53/228 ,  B01D67/0067 ,  B01D71/021 ,  B01D71/028 ,  B01D71/30 ,  B01D71/80 ,  B01D67/002 ,  B01D69/08 ,  B01D71/40 ,  B01D71/42 ,  B01D2256/10 ,  B01D2256/20 ,  B01D2256/22 ,  B01D2256/245 ,  B01D2257/108 ,  B01D2325/022 ,  B01D2325/04 ,  B01D2325/20

Abstract: 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.

公开(公告)号：US20230030536A1

公开(公告)日：2023-02-02

申请号：US17788597

申请日：2020-12-16

Applicant: Dow Global Technologies LLC

Inventor： Junqiang Liu ,  Janet M. Goss

IPC: B01J20/20 ,  C01B32/318 ,  B01J20/28 ,  B01J20/30

Abstract: Methods for forming a carbon molecular sieve includes loading polymer fibers into a mold and heating the mold containing the polymer fibers to a temperature in a range from 50 ° C. to 350 ° C. to form a polymer monolith. The polymer monolith is then pyrolized by heating to a temperature in a range from 500 ° C. to 1700 ° C. A carbon molecular sieve monolith includes a first end and a second end opposite the first end, and carbon molecular sieve fibers aligned in parallel from the first end of the carbon molecular sieve monolith to the second end of the carbon molecular sieve monolith. Channels extend from the first end of the carbon molecular sieve monolith to the second end of the carbon molecular sieve monolith, and outer surfaces of the carbon molecular sieve fibers are joined. The carbon molecular sieve monolith has a cell density of greater than 500 cells per square inch.

公开(公告)号：US11202995B2

公开(公告)日：2021-12-21

申请号：US16621433

申请日：2018-04-12

Applicant: Dow Global Technologies LLC

Inventor： Junqiang Liu ,  Janet M. Goss ,  Stephanie K. Anderson

IPC: B01D53/22 ,  B01D69/10 ,  B01D69/12 ,  B01D71/02 ,  B01D71/30

Abstract: A supported carbon molecular sieve (CMS) membrane is made by contacting a film of a carbon forming polymer on a polymer textile to form a laminate. The laminate is then heated to a temperature for a time under an atmosphere sufficient to carbonize the film and polymer textile to form the supported CMS membrane. The supported CMS membrane formed is a laminate having a carbon separating layer graphitically bonded to a carbon textile, wherein the carbon separating layer is a continuous film. The supported CMS membranes are particularly useful for separating gases such as olefins from their corresponding paraffins.

公开(公告)号：US20210229045A1

公开(公告)日：2021-07-29

申请号：US17231358

申请日：2021-04-15

Applicant: Dow Global Technologies LLC

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

IPC: B01D69/02 ,  B01D53/22 ,  B01D67/00 ,  B01D71/02 ,  B01D71/80 ,  B01D71/30

Abstract: 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.

公开(公告)号：US20170368493A1

公开(公告)日：2017-12-28

申请号：US15535434

申请日：2016-01-06

Applicant: Dow Global Technologies LLC

Inventor： Junqiang Liu ,  Chan Han ,  H. Robert Goltz ,  Matthew L. Rodgers ,  Scott T. Matteucci ,  Brandon J. Kem

IPC: B01D53/08 ,  B01J20/20 ,  B01J20/28 ,  B01J20/26 ,  B01J20/34 ,  B01J20/30

CPC classification number: B01D53/08 ,  B01D53/02 ,  B01D2253/206 ,  B01D2253/308 ,  B01D2256/24 ,  B01D2256/245 ,  B01D2257/102 ,  B01D2259/40094 ,  B01J20/20 ,  B01J20/267 ,  B01J20/28061 ,  B01J20/28064 ,  B01J20/2808 ,  B01J20/28085 ,  B01J20/28092 ,  B01J20/3078 ,  B01J20/3416 ,  B01J20/3441 ,  B01J2220/4812 ,  Y02C20/20

Abstract: A method for separating N2 from a hydrocarbon gas mixture containing N2 comprising the steps of: i) providing a bed of adsorbent selective for N2; (ii) passing the hydrocarbon gas mixture through the bed of adsorbent to at least partially remove N2 from the gas mixture to produce: (a) N2-loaded adsorbent and (b) N2-depleted hydrocarbon gas mixture; iii) recovering the N2-depleted hydrocarbon gas mixture; iv) regenerating the N2-loaded adsorbent by at least partially removing N2 from the adsorbent; and v) sequentially repeating steps (ii) and (iii) using regenerated adsorbent from step (iv); wherein the adsorbent comprises a pyrolized sulfonated macroporous ion exchange resin.