公开(公告)号：US20240279193A1

公开(公告)日：2024-08-22

申请号：US18571443

申请日：2022-09-19

Applicant: Dow Global Technologies LLC

Inventor： Wen -Sheng Lee ,  Mark H. McAdon ,  Edward M. Calverley ,  Vera Santos Castro

IPC: C07D301/10 ,  B01J23/68 ,  B01J37/24

CPC classification number: C07D301/10 ,  B01J23/688 ,  B01J37/24

Abstract: Disclosed herein are methods of improving the life of high selectivity, silver catalysts for making ethylene oxide. Ethylene and oxygen are reacted over the high efficiency catalyst with at least one organic chloride modifier, and during a catalyst aging period of no less than 0.03 kt ethylene oxide/cubic meter catalyst, the overall catalyst chloriding effectiveness never exceeds an efficiency-maximizing optimum overall catalyst chloriding effectiveness value that corresponds to a reference feed gas composition and a set of reference reaction condition values. Reaction temperature and/or feed gas oxygen concentration are adjusted to obtain or maintain a desired value of an ethylene oxide production parameter. Once the reaction temperature and/or oxygen concentration vary by a specified amount from their respective reference values in the set of reference reaction condition values, the overall catalyst chloriding effectiveness is changed to account for a shift in the optimum (efficiency-maximizing) value.

公开(公告)号：US11572321B2

公开(公告)日：2023-02-07

申请号：US17532472

申请日：2021-11-22

Applicant: Dow Global Technologies LLC

Inventor： Davy L. S. Nieskens ,  Glenn Pollefeyt ,  Andrzej Malek ,  Edward M. Calverley ,  Peter E. Groenendijk ,  Aysegul Ciftci Sandikci

IPC: C07C1/04 ,  B01J21/02 ,  B01J23/26 ,  B01J23/80 ,  C07C1/12

Abstract: A process for preparing C2 to C5 paraffins includes introducing a feed stream comprising hydrogen gas and a carbon-containing gas into a reaction zone of a reactor, and converting the feed stream into a product stream comprising C2 to C5 paraffins in the reaction zone in the presence of a hybrid catalyst. The hybrid catalyst includes a metal oxide catalyst component and a microporous catalyst component. The metal oxide catalyst component satisfies: an atomic ratio of Cu/Zn from 0.01 to 3.00; an atomic ratio of Cr/Zn from 0.01 to 1.50; and percentage of (Al+Cr) from greater than 0.0 at % to 50.0 at % based on a total amount of metal in the metal oxide catalyst component.

公开(公告)号：US11007488B2

公开(公告)日：2021-05-18

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

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：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：US11208363B2

公开(公告)日：2021-12-28

申请号：US16967599

申请日：2019-02-07

Applicant: Dow Global Technologies LLC

Inventor： Davy L. S. Nieskens ,  Glenn Pollefeyt ,  Andrzej Malek ,  Edward M. Calverley ,  Peter E. Groenendijk ,  Aysegul Ciftci Sandikci

IPC: C07C1/04 ,  B01J21/02 ,  B01J23/26 ,  B01J23/80 ,  C07C1/12

Abstract: A process for preparing C2 to C5 paraffins includes introducing a feed stream comprising hydrogen gas and a carbon-containing gas into a reaction zone of a reactor, and converting the feed stream into a product stream comprising C2 to C5 paraffins in the reaction zone in the presence of a hybrid catalyst. The hybrid catalyst includes a metal oxide catalyst component and a microporous catalyst component. The metal oxide catalyst component satisfies: an atomic ratio of Cu/Zn from 0.01 to 3.00; an atomic ratio of Cr/Zn from 0.01 to 1.50; and percentage of (Al+Cr) from greater than 0.0 at % to 50.0 at % based on a total amount of metal in the metal oxide catalyst component.

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：US20170203276A1

公开(公告)日：2017-07-20

申请号：US15320334

申请日：2015-06-22

Applicant: Dow Global Technologies LLC

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

IPC: B01J20/20 ,  B01J20/30 ,  B01D53/02 ,  B01J20/28

CPC classification number: B01J20/20 ,  B01D53/02 ,  B01D53/228 ,  B01D67/0067 ,  B01D69/02 ,  B01D71/021 ,  B01D71/34 ,  B01D2253/102 ,  B01D2253/116 ,  B01D2253/308 ,  B01D2253/311 ,  B01D2256/10 ,  B01D2256/24 ,  B01D2256/245 ,  B01D2257/102 ,  B01D2257/504 ,  B01D2257/7022 ,  B01D2257/7025 ,  B01D2325/023 ,  B01J20/28016 ,  B01J20/28023 ,  B01J20/28038 ,  B01J20/28069 ,  B01J20/2808 ,  B01J20/3007 ,  B01J20/3021 ,  B01J20/3028 ,  B01J20/3078 ,  B01J2220/4812 ,  C01B32/00 ,  C01B32/306 ,  C01B32/382 ,  C01P2006/14 ,  C01P2006/16 ,  Y02C10/08 ,  Y02C20/20 ,  Y02P20/152 ,  Y02P20/156

Abstract: 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.

公开(公告)号：US09579627B2

公开(公告)日：2017-02-28

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: C01B31/02 ,  B01J20/20 ,  C01B31/08 ,  B01J20/28 ,  B01J20/30 ,  C01B31/00 ,  C07C7/12 ,  B01D53/04 ,  B01D53/047

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：US20210087120A1

公开(公告)日：2021-03-25

申请号：US16967599

申请日：2019-02-07

Applicant: Dow Global Technologies LLC

Inventor： Davy L.S. Nieskens ,  Glenn Pollefeyt ,  Andrzej Malek ,  Edward M. Calverley ,  Peter E. Groenendijk ,  Aysegul Ciftci Sandikci

IPC: C07C1/04 ,  B01J23/26 ,  B01J21/02 ,  B01J23/80 ,  C07C1/12

Abstract: A process for preparing C2 to C5 paraffins includes introducing a feed stream comprising hydrogen gas and a carbon-containing gas into a reaction zone of a reactor, and converting the feed stream into a product stream comprising C2 to C5 paraffins in the reaction zone in the presence of a hybrid catalyst. The hybrid catalyst includes a metal oxide catalyst component and a microporous catalyst component. The metal oxide catalyst component satisfies: an atomic ratio of Cu/Zn from 0.01 to 3.00; an atomic ratio of Cr/Zn from 0.01 to 1.50; and percentage of (Al+Cr) from greater than 0.0 at % to 50.0 at % based on a total amount of metal in the metal oxide catalyst component.

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.