Permselective membrane compositions for gas separations and process for the separation of gases therewith

Claim 2

A permselective membrane composition for the separation of gases from a mixture containing at least two gases comprising: from about 25 to 100 parts by weight of a polyarylene having the formula ##STR12## wherein R is a C 1 to C 8 aliphatic radical, a C 5 to C 7 cycloaliphatic radical, a C 1 to C 8 alkoxy radical, a C 6 to C 12 aryl radical, an aralkyl radical or an alkaryl radical, each radical being free of a tertiary alpha-carbon atom; X is H, Cl or Br; Y is a divalent oxygen or sulfur atom or a sulfonyl or carbonate group; Q is H, Cl, Br, or a sulfonyl radical of the formula ##STR13## where R 1 is a C 1 to C 20 linear or branched hydrocarbon or a nonpolymeric aryl radical; and n is an integer of from about 75 to 10,000; from about 0 to 75 parts by weight of a crosslinkable copolymer, the copolymer being present at least when the polyarylene component is devoid of crosslinkable cites; and from about one to 50 parts by weight, based upon the total weight of said polyarylene and crosslinkable copolymer, of a silicon-containing amineterminated compound selected from the group consisting of the siloxanes having the formula ##STR14## wherein R 2 is a C 1 to C 12 aliphatic radical or a C 1 to C 12 aliphatic radical containing a primary or secondary amine, R 3 is a C 1 to C 12 aliphatic radical or a C 6 to C 12 aryl radical, n is an integer of from about two to 2000 and x is 1 or 2, and silanes having the formula H.sub.2 N--R.sub.2 --[Si--O--R.sub.4 ].sub.3 wherein R 4 is a C 1 to C 12 aliphatic radical.

Claim 3

A permselective membrane composition, as set forth in claim 1, wherein said polyarylene is present in an amount of 100 parts, said R is methyl, one X is bromine and the other X is hydrogen, Y is oxygen, Q is hydrogen and n is 100 to 3000.

Claim 4

A permselective membrane composition, as set forth in claim 2, wherein said silicon-containing amineterminated compound is aminopropyl terminated polydimethylsiloxane.

Claim 5

A permselective membrane composition, as set forth in claim 2, wherein said silicon-containing amine-terminated compound comprises aminopropyltriethoxysilane, silicon tetraethoxysilane and mixtures thereof.

Claim 6

A permselective membrane composition, as set forth in claim 1, comprising 100 total parts of said polyarylene and said crosslinkable copolymer wherein said R is methyl, said X is hyrdrogen, Y is oxygen, Q is hydrogen and n is 100 to 3000.

Claim 7

A permselective membrane composition, as set forth in claim 5, wherein said polyarylene is present in an amount of 75 parts and said crosslinkable copolymer is present in an amount of 25 parts, said copolymer comprising a random copolymer containing maleic anhydride.

Claim 8

A permselective membrane composition, as set forth in claim 6, wherein said copolymer comprises poly(styrene-co-maleic anhydride).

Claim 9

A permselective membrane composition, as set forth in claim 7, wherein said silicon-containing amine-terminated compound is aminopropyl terminated polydimethylsiloxane.

Claim 10

A permselective membrane composition, as set forth in claim 7, wherein said silicon-containing amine-terminated compound comprises aminopropyltriethoxysilane, silicon tetraethoxysilane and mixtures thereof.

Claim 11

A permselective membrane composition, as set forth in claim 1, comprising 100 total parts of said polyarylene and said crosslinkable copolymer wherein said R is methyl, said X is hydrogen, Y is oxygen, one Q is bromine and the other Q is hydrogen and n is 100 to 3000.

Claim 12

A permselective membrane composition, as set forth in claim 10, wherein said polyarylene is present in an amount of 75 parts and said crosslinkable copolymer is present in an amount of 25 parts, said copolymer comprising a random copolymer containing maleic anhydride.

Claim 13

A permselective membrane composition, as set forth in claim 11, wherein said copolymer comprises poly(styrene-co-maleic anhydride).

Claim 14

A permselective membrane composition, as set forth in claim 11, wherein said silicon-containing amineterminated compound is aminopropyl terminated polydimethylsiloxane.

Claim 15

A permselective membrane composition, as set forth in claim 11, wherein said silicon-containing amine-terminated compound comprises aminopropyltriethoxysilane, silicon tetraethoxysilane and mixtures thereof.

Claim 16

A process for the separation of gases from a mixture containing at least two gases comprising the step of: passing said mixture over a permselective membrane composition wherein said membrane composition is formed by a polymer membrane having from about 25 to 100 parts by weight of a polyarylene having the formula ##STR15## wherein R is a C 1 to C 8 aliphatic radical, a C 5 to C 7 cycloaliphatic radical, a C 1 to C 8 alkoxy radical, a C 6 to C 12 aryl radical, an aralkyl radical or an alkaryl radical, each radical being free of a tertiary alpha-carbon atom; X is H, Cl or Br; Y is a divalent oxygen or sulfur atom or a sulfonyl or carbonate group; Q is H, Cl, Br, or a sulfonyl radical of the formula ##STR16## where R 1 is a C 1 to C 20 linear or branched hydrocarbon or a nonpolymeric aryl radical; and n is an integer of from about 75 to 10,000; from about 0 to 75 parts by weight of a crosslinkable copolymer, the copolymer being present at least when the polyarylene component is devoid of crosslinkable cites; and from about one to 50 parts by weight, based upon the total weight of said polyarylene and crosslinkable copolymer, of a silicon-containing amineterminated compound selected from the group consisting of the siloxanes having the formula ##STR17## wherein R 2 is a C 1 to C 12 aliphatic radical or a C 1 to C 12 aliphatic radical containing a primary or secondary amine, R 3 is a C 1 to C 12 aliphatic radical or a C 6 to C 12 aryl radical, n is an integer of from about two to 2000 and x is 1 or 2, and silanes having the formula H.sub.2 N--R.sub.2 --[Si--O--R.sub.4 ].sub.3 wherein R 4 is a C 1 to C 12 aliphatic radical.

Claim 17

A process for the separation of gases from a mixture containing at least two gases comprising the step of: passing said mixture over a permselective membrane composition wherein said membrane composition is formed by a polymer membrane having from about 25 to 100 parts by weight of a polyarylene having the formula ##STR15## wherein R is a C 1 to C 8 aliphatic radical, a C 5 to C 7 cycloaliphatic radical, a C 1 to C 8 alkoxy radical, a C 6 to C 12 aryl radical, an aralkyl radical or an alkaryl radical, each radical being free of a tertiary alpha-carbon atom; X is H, Cl or Br; Y is a divalent oxygen or sulfur atom or a sulfonyl or carbonate group; Q is H, Cl, Br, or a sulfonyl radical of the formula ##STR16## where R 1 is a C 1 to C 20 linear or branched hydrocarbon or a nonpolymeric aryl radical; and n is an integer of from about 75 to 10,000; from about 0 to 75 parts by weight of a crosslinkable copolymer, the copolymer being present at least when the polyarylene component is devoid of crosslinkable cites; and from about one to 50 parts by weight, based upon the total weight of said polyarylene and crosslinkable copolymer, of a silicon-containing amineterminated compound selected from the group consisting of the siloxanes having the formula ##STR17## wherein R 2 is a C 1 to C 12 aliphatic radical or a C 1 to C 12 aliphatic radical containing a primary or secondary amine, R 3 is a C 1 to C 12 aliphatic radical or a C 6 to C 12 aryl radical, n is an integer of from about two to 2000 and x is 1 or 2, and silanes having the formula H.sub.2 N--R.sub.2 --[Si--O--R.sub.4 ].sub.3 wherein R 4 is a C 1 to C 12 aliphatic radical.

Claim 18

A process, as set forth in claim 15, comprising 100 parts of said polyarylene wherein said R is methyl, one X is bromine and the other X is hydrogen, Y is oxygen, Q is hydrogen and n is 100 to 3000.

Claim 19

A process, as set forth in claim 16, wherein said silicon-containing amineterminated compound is aminopropyl terminated polydimethylsiloxane.

Claim 20

A process, as set forth in claim 16, wherein said silicon-containing amineterminated compound comprises aminopropyltriethoxysilane, silicon tetraethoxysilane and mixtures thereof.

Claim 21

A process, as set forth in claim 15, comprising 100 total parts of said polyarylene and said crosslinkable copolymer wherein said R is methyl, said X is hydrogen, Y is oxygen, Q is hydrogen and n is 100 to 3000.

Claim 22

A process, as set forth in claim 19, wherein said polyarylene is present in an amount of 75 parts and said crosslinkable copolymer is present in an amount of 25 parts, said copolymer comprising a random copolymer containing maleic anhydride.

Claim 23

A process, as set forth in claim 20, wherein said copolymer comprises poly(styrene-co-maleic anhydride).

Claim 24

A process, as set forth in claim 21, wherein said silicon-containing amineterminated compound is aminopropyl terminated polydimethylsiloxane.

Claim 25

A process, as set forth in claim 21, wherein said silicon-containing amineterminated compound comprises aminopropyltriethoxysilane, silicon tetraethoxysilane and mixtures thereof.

Claim 26

A process, as set forth in claim 15, comprising 100 total parts of said polyarylene and said crosslinkable copolymer wherein said R is methyl, said X is hydrogen, Y is oxygen, one Q is bromine and the other Q is hydrogen and n is 100 to 3000.

Claim 27

A process, as set forth in claim 24, wherein said polyarylene is present in an amount of 100 parts and said crosslinkable copolymer is present in an amount of 25 parts, said copolymer comprising a random copolymer containing maleic anhydride.

Claim 28

A process, as set forth in claim 25, wherein said copolymer comprises poly(styrene-co-maleic anhydride).

Claim 29

A process, as set forth in claim 26, wherein said silicon-containing amineterminated compound is aminopropyl terminated polydimethylsiloxane.

Claim 30

A process, as set forth in claim 26, wherein said silicon-containing amineterminated compound comprises aminopropyltriethoxysilane, silicon tetraethoxysilane and mixtures thereof.

Claim 31

A process, as set forth in claim 15, wherein said mixture of gases comprises hydrogen, helium, oxygen, nitrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia, water vapor and C 1 to C 4 hydrocarbons.

Claim 32

A process, as set forth in claim 29, wherein said mixture of gases comprises carbon dioxide and methane.

Claim 33

A process, as set forth in claim 30, wherein said permselective membrane composition has a carbon dioxide permeability of at least about 60 Barrers.

Claim 34

A process, as set forth in claim 31, wherein said permselective membrane composition has a selectivity of from about 15 to 25.

Claim 35

A process, as set forth in claim 15, wherein said separation of gases is conducted at a pressure of from about 0.10 to about 200 MPa.