Mixed matrix membrane for gas separation
First Claim
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1. A multi-component membrane for the separation of gases, the membrane comprising a mixture of silicone rubber, zeolite particles and a nitrogen containing compound on a cellulose acetate porous support media wherein said nitrogen containing compound is of a general formula:
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NR1R2R3 wherein R1, R2 and R3 may independently one or more of the following groups;
C1-C50-alkyl, C3-C50-cycloalkyl, aromatic, alkyl substituted aromatic, such as C1-C50-alkyl substituted aromatic, aromatic substituted aliphatic moieties such as C1-C50-alkylene moieties substituted with one or more aromatic groups, C1-C50-hydroxyalkyl, amino- and/or hydroxyl-substituted C1-C50-alkyl, alkoxyalkyl such as C2-C50-alkoxyalkyl, dialkylaminoalkyl such as C3-C50-dialkylaminoalkyl, alkylaminoalkyl such as C2-C50-alkylaminoalkyl, heterocyclic, aromatic heterocyclic, alkyl substituted heterocyclic and alkyl substituted aromatic heterocyclic, such as C1-C50-alkyl substituted heterocyclic and aromatic heterocyclic compounds, and heterocyclic substituted aliphatic moieties such as C1-C50-alkylene moieties substituted with one or more aromatic groups and R1 and R2 may independently be hydrogen and R1 and R2 may form, with the nitrogen atom, a nitrogen-containing heterocycle, aromatic heterocycle, alkyl substituted heterocycle or alkyl substituted aromatic heterocycle, with the proviso that when R3 is alkyl and R1 and R2 are independently hydrogen then R3 is C4-C50-alkyl.
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Abstract
An improved mixed matrix membrane for the separation of gases comprises a nitrogen containing compound such as an amine, silicone rubber and activated carbon on a porous support. The membrane may also comprise a carbonate such as potassium carbonate and a plasticizer such as polyethylene glycol. Membranes of this design may be used in processing natural gas or other gases. The gases which may be separated by the membrane include mixtures of methane and carbon dioxide, mixtures of oxygen and nitrogen, and mixtures of carbon dioxide and nitrogen.
27 Citations
17 Claims
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1. A multi-component membrane for the separation of gases, the membrane comprising a mixture of silicone rubber, zeolite particles and a nitrogen containing compound on a cellulose acetate porous support media wherein said nitrogen containing compound is of a general formula:
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NR1R2R3wherein R1, R2 and R3 may independently one or more of the following groups;
C1-C50-alkyl, C3-C50-cycloalkyl, aromatic, alkyl substituted aromatic, such as C1-C50-alkyl substituted aromatic, aromatic substituted aliphatic moieties such as C1-C50-alkylene moieties substituted with one or more aromatic groups, C1-C50-hydroxyalkyl, amino- and/or hydroxyl-substituted C1-C50-alkyl, alkoxyalkyl such as C2-C50-alkoxyalkyl, dialkylaminoalkyl such as C3-C50-dialkylaminoalkyl, alkylaminoalkyl such as C2-C50-alkylaminoalkyl, heterocyclic, aromatic heterocyclic, alkyl substituted heterocyclic and alkyl substituted aromatic heterocyclic, such as C1-C50-alkyl substituted heterocyclic and aromatic heterocyclic compounds, and heterocyclic substituted aliphatic moieties such as C1-C50-alkylene moieties substituted with one or more aromatic groups and R1 and R2 may independently be hydrogen and R1 and R2 may form, with the nitrogen atom, a nitrogen-containing heterocycle, aromatic heterocycle, alkyl substituted heterocycle or alkyl substituted aromatic heterocycle, with the proviso that when R3 is alkyl and R1 and R2 are independently hydrogen then R3 is C4-C50-alkyl.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A process for separating a gas mixture comprising contacting a pressurized gas mixture with a multi-component membrane comprising a mixture of silicone rubber, zeolite particles and a nitrogen containing compound on a cellulose acetate porous support media wherein said nitrogen containing compound is of a general formula:
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NR1R2R3wherein R1, R2 and R3 may independently one or more of the following groups;
C1-C50-alkyl, C3-C50-cycloalkyl, aromatic, alkyl substituted aromatic, such as C1-C50-alkyl substituted aromatic, aromatic substituted aliphatic moieties such as C1-C50-alkylene moieties substituted with one or more aromatic groups, C1-C50-hydroxyalkyl, amino- and/or hydroxyl-substituted C1-C50-alkyl, alkoxyalkyl such as C2-C50-alkoxyalkyl, dialkylaminoalkyl such as C3-C50-dialkylaminoalkyl, alkylaminoalkyl such as C2-C50-alkylaminoalkyl, heterocyclic, aromatic heterocyclic, alkyl substituted heterocyclic and alkyl substituted aromatic heterocyclic, such as C1-C50-alkyl substituted heterocyclic and aromatic heterocyclic compounds, and heterocyclic substituted aliphatic moieties such as C1-C50-alkylene moieties substituted with one or more aromatic groups and R1 and R2 may independently be hydrogen and R1 and R2 may form, with the nitrogen atom, a nitrogen-containing heterocycle, aromatic heterocycle, alkyl substituted heterocycle or alkyl substituted aromatic heterocycle, with the proviso that when R3 is alkyl and R1 and R2 are independently hydrogen then R3 is C4-C50-alkyl.- View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification
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Current AssigneeUOP Llc (Honeywell International Inc.)
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Original AssigneeUOP Llc (Honeywell International Inc.)
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InventorsSoontraratpong, Jidapa, Kulprathipanja, Santi, Chiou, Jeffrey J.
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Primary Examiner(s)Smith; Duane
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Assistant Examiner(s)ORLANDO, AMBER ROSE
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Application NumberUS11/216,823Time in Patent Office930 DaysField of Search585/640, 95/45, 502/4, 96/4US Class Current95/45CPC Class CodesB01D 2257/504 Carbon dioxideB01D 2257/7022 Aliphatic hydrocarbonsB01D 2323/20 PlasticizersB01D 53/228 characterised by specific m...B01D 67/0079 Manufacture of membranes co...B01D 67/00793 Dispersing a component, e.g...B01D 69/10 Supported membranes; Membra...B01D 69/1071 Woven, non-woven or net meshB01D 69/141 Heterogeneous membranes, e....B01D 69/1411 containing dispersed materi...B01D 69/148 Organic/inorganic mixed mat...B01D 71/028 Molecular sieves carbon B01...B01D 71/0281 ZeolitesB01D 71/16 Cellulose acetateB01D 71/70 Polymers having silicon in ...B01D 71/701 PolydimethylsiloxaneY02C 20/40 of CO2
