JP5472114B2 - 非対称ガス分離膜、及びガス分離方法 - Google Patents
非対称ガス分離膜、及びガス分離方法 Download PDFInfo
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- JP5472114B2 JP5472114B2 JP2010531897A JP2010531897A JP5472114B2 JP 5472114 B2 JP5472114 B2 JP 5472114B2 JP 2010531897 A JP2010531897 A JP 2010531897A JP 2010531897 A JP2010531897 A JP 2010531897A JP 5472114 B2 JP5472114 B2 JP 5472114B2
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- Prior art keywords
- gas separation
- separation membrane
- asymmetric
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- 238000000926 separation method Methods 0.000 title claims description 105
- 239000007789 gas Substances 0.000 claims description 133
- 239000004642 Polyimide Substances 0.000 claims description 65
- 229920001721 polyimide Polymers 0.000 claims description 65
- 239000012510 hollow fiber Substances 0.000 claims description 63
- 125000003118 aryl group Chemical group 0.000 claims description 52
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 39
- 239000002904 solvent Substances 0.000 claims description 37
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 26
- 150000004985 diamines Chemical class 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 22
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 21
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 21
- 229910001882 dioxygen Inorganic materials 0.000 claims description 21
- 150000001408 amides Chemical class 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 15
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- 150000001875 compounds Chemical class 0.000 claims description 12
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- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 10
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- 125000000962 organic group Chemical group 0.000 claims description 10
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- NSGXIBWMJZWTPY-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropane Chemical compound FC(F)(F)CC(F)(F)F NSGXIBWMJZWTPY-UHFFFAOYSA-N 0.000 claims description 4
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- 239000007864 aqueous solution Substances 0.000 description 8
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- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 4
- 150000002170 ethers Chemical class 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- HFEPENYPELKAQF-UHFFFAOYSA-N 2,6-dimethyldibenzothiophene-3,7-diamine Chemical compound S1C2=C(C)C(N)=CC=C2C2=C1C=C(N)C(C)=C2 HFEPENYPELKAQF-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
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- GWHLJVMSZRKEAQ-UHFFFAOYSA-N 3-(2,3-dicarboxyphenyl)phthalic acid Chemical compound OC(=O)C1=CC=CC(C=2C(=C(C(O)=O)C=CC=2)C(O)=O)=C1C(O)=O GWHLJVMSZRKEAQ-UHFFFAOYSA-N 0.000 description 1
- NBAUUNCGSMAPFM-UHFFFAOYSA-N 3-(3,4-dicarboxyphenyl)phthalic acid Chemical compound C1=C(C(O)=O)C(C(=O)O)=CC=C1C1=CC=CC(C(O)=O)=C1C(O)=O NBAUUNCGSMAPFM-UHFFFAOYSA-N 0.000 description 1
- LXJLFVRAWOOQDR-UHFFFAOYSA-N 3-(3-aminophenoxy)aniline Chemical compound NC1=CC=CC(OC=2C=C(N)C=CC=2)=C1 LXJLFVRAWOOQDR-UHFFFAOYSA-N 0.000 description 1
- LJGHYPLBDBRCRZ-UHFFFAOYSA-N 3-(3-aminophenyl)sulfonylaniline Chemical compound NC1=CC=CC(S(=O)(=O)C=2C=C(N)C=CC=2)=C1 LJGHYPLBDBRCRZ-UHFFFAOYSA-N 0.000 description 1
- ZBMISJGHVWNWTE-UHFFFAOYSA-N 3-(4-aminophenoxy)aniline Chemical compound C1=CC(N)=CC=C1OC1=CC=CC(N)=C1 ZBMISJGHVWNWTE-UHFFFAOYSA-N 0.000 description 1
- ZMPZWXKBGSQATE-UHFFFAOYSA-N 3-(4-aminophenyl)sulfonylaniline Chemical compound C1=CC(N)=CC=C1S(=O)(=O)C1=CC=CC(N)=C1 ZMPZWXKBGSQATE-UHFFFAOYSA-N 0.000 description 1
- CKOFBUUFHALZGK-UHFFFAOYSA-N 3-[(3-aminophenyl)methyl]aniline Chemical compound NC1=CC=CC(CC=2C=C(N)C=CC=2)=C1 CKOFBUUFHALZGK-UHFFFAOYSA-N 0.000 description 1
- ULPWATNJVBJKGM-UHFFFAOYSA-N 3-[2-(3-amino-2-phenoxyphenyl)propan-2-yl]-2-phenoxyaniline Chemical class C=1C=CC(N)=C(OC=2C=CC=CC=2)C=1C(C)(C)C1=CC=CC(N)=C1OC1=CC=CC=C1 ULPWATNJVBJKGM-UHFFFAOYSA-N 0.000 description 1
- DVXYMCJCMDTSQA-UHFFFAOYSA-N 3-[2-(3-aminophenyl)propan-2-yl]aniline Chemical compound C=1C=CC(N)=CC=1C(C)(C)C1=CC=CC(N)=C1 DVXYMCJCMDTSQA-UHFFFAOYSA-N 0.000 description 1
- MFTFTIALAXXIMU-UHFFFAOYSA-N 3-[4-[2-[4-(3-aminophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropan-2-yl]phenoxy]aniline Chemical compound NC1=CC=CC(OC=2C=CC(=CC=2)C(C=2C=CC(OC=3C=C(N)C=CC=3)=CC=2)(C(F)(F)F)C(F)(F)F)=C1 MFTFTIALAXXIMU-UHFFFAOYSA-N 0.000 description 1
- NYRFBMFAUFUULG-UHFFFAOYSA-N 3-[4-[2-[4-(3-aminophenoxy)phenyl]propan-2-yl]phenoxy]aniline Chemical compound C=1C=C(OC=2C=C(N)C=CC=2)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=CC(N)=C1 NYRFBMFAUFUULG-UHFFFAOYSA-N 0.000 description 1
- MNOJRWOWILAHAV-UHFFFAOYSA-N 3-bromophenol Chemical compound OC1=CC=CC(Br)=C1 MNOJRWOWILAHAV-UHFFFAOYSA-N 0.000 description 1
- HORNXRXVQWOLPJ-UHFFFAOYSA-N 3-chlorophenol Chemical compound OC1=CC=CC(Cl)=C1 HORNXRXVQWOLPJ-UHFFFAOYSA-N 0.000 description 1
- YBRVSVVVWCFQMG-UHFFFAOYSA-N 4,4'-diaminodiphenylmethane Chemical compound C1=CC(N)=CC=C1CC1=CC=C(N)C=C1 YBRVSVVVWCFQMG-UHFFFAOYSA-N 0.000 description 1
- IVMKNKOXNQPIMT-UHFFFAOYSA-N 4,6-dimethoxydibenzothiophene-3,7-diamine Chemical compound S1C2=C(OC)C(N)=CC=C2C2=C1C(OC)=C(N)C=C2 IVMKNKOXNQPIMT-UHFFFAOYSA-N 0.000 description 1
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 1
- ZYEDGEXYGKWJPB-UHFFFAOYSA-N 4-[2-(4-aminophenyl)propan-2-yl]aniline Chemical compound C=1C=C(N)C=CC=1C(C)(C)C1=CC=C(N)C=C1 ZYEDGEXYGKWJPB-UHFFFAOYSA-N 0.000 description 1
- KMKWGXGSGPYISJ-UHFFFAOYSA-N 4-[4-[2-[4-(4-aminophenoxy)phenyl]propan-2-yl]phenoxy]aniline Chemical compound C=1C=C(OC=2C=CC(N)=CC=2)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(N)C=C1 KMKWGXGSGPYISJ-UHFFFAOYSA-N 0.000 description 1
- GZFGOTFRPZRKDS-UHFFFAOYSA-N 4-bromophenol Chemical compound OC1=CC=C(Br)C=C1 GZFGOTFRPZRKDS-UHFFFAOYSA-N 0.000 description 1
- YPCNDGPUJSVBIV-UHFFFAOYSA-N 5-amino-2-(4-amino-2-hydroxyphenyl)phenol Chemical group OC1=CC(N)=CC=C1C1=CC=C(N)C=C1O YPCNDGPUJSVBIV-UHFFFAOYSA-N 0.000 description 1
- MQJKPEGWNLWLTK-UHFFFAOYSA-N Dapsone Chemical compound C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 MQJKPEGWNLWLTK-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- SUAKHGWARZSWIH-UHFFFAOYSA-N N,N‐diethylformamide Chemical class CCN(CC)C=O SUAKHGWARZSWIH-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000004984 aromatic diamines Chemical class 0.000 description 1
- TUQQUUXMCKXGDI-UHFFFAOYSA-N bis(3-aminophenyl)methanone Chemical compound NC1=CC=CC(C(=O)C=2C=C(N)C=CC=2)=C1 TUQQUUXMCKXGDI-UHFFFAOYSA-N 0.000 description 1
- ZLSMCQSGRWNEGX-UHFFFAOYSA-N bis(4-aminophenyl)methanone Chemical compound C1=CC(N)=CC=C1C(=O)C1=CC=C(N)C=C1 ZLSMCQSGRWNEGX-UHFFFAOYSA-N 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- ZZTCPWRAHWXWCH-UHFFFAOYSA-N diphenylmethanediamine Chemical class C=1C=CC=CC=1C(N)(N)C1=CC=CC=C1 ZZTCPWRAHWXWCH-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- SYSQUGFVNFXIIT-UHFFFAOYSA-N n-[4-(1,3-benzoxazol-2-yl)phenyl]-4-nitrobenzenesulfonamide Chemical class C1=CC([N+](=O)[O-])=CC=C1S(=O)(=O)NC1=CC=C(C=2OC3=CC=CC=C3N=2)C=C1 SYSQUGFVNFXIIT-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000879 optical micrograph Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 150000004986 phenylenediamines Chemical class 0.000 description 1
- 229920005575 poly(amic acid) Polymers 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 1
- 229960001755 resorcinol Drugs 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 125000001174 sulfone group Chemical group 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 150000004992 toluidines Chemical class 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 125000002256 xylenyl group Chemical class C1(C(C=CC=C1)C)(C)* 0.000 description 1
Classifications
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- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Description
〔但し、一般式(1)のBは、
10〜70モル%の、下記一般式(B1)で示されるジフェニルヘキサフルオロプロパン構造に基づく4価のユニットB1、および
90〜30モル%の、下記一般式(B2)で示されるビフェニル構造に基づく4価のユニットB2
を含有し、
一般式(1)のAは、
10〜50モル%の、下記一般式(A1a)で示されるユニットおよび(A1b)で示されるユニットからなる群より選ばれるヘキサフルオロ置換構造に基づく2価のユニットA1、および
90〜30モル%の、下記一般式(A2a)で示される2価のユニット及び下記一般式(A2b)で示される2価のユニットからなる群より選ばれる含硫黄ヘテロ環構造に基づく2価のユニットA2を含有する。
(式中、R及びR’は水素原子又は有機基であり、Xは−CH2−又は−CO−である。)
〕
2. 前記ユニットA1が2,2−ビス〔4−(4−アミノフェノキシ)フェニル〕ヘキサフルオロプロパン、2,2−ビス(4−アミノフェニル)ヘキサフルオロプロパン、2,2−ビス(3−アミノ−4−ヒドロキシ)ヘキサフルオロプロパン、2,2’−ビス(トリフルオロメチル)−4,4’−ジアミノビフェニル、2,2’−ビス(トリフルオロメチル)−4,4’−ジアミノジフェニルエーテル、およびこれらの化合物の組み合わせからなる群より選ばれる化合物からアミノ基を除いた2価のユニットであることを特徴とする上記1に記載の非対称ガス分離膜。
(式中、YはOまたは単結合を示す。)
一般式(A1b−M)で表されるジアミン化合物類としては、例えば、2,2’−ビス(トリフルオロメチル)−4,4’−ジアミノジフェニルエーテル、2,2’−ビス(トリフルオロメチル)−4,4’−ジアミノビフェニル等を挙げることができる。
4,4’−ジアミノジフェニルエーテル、3,4’−ジアミノジフェニルエーテル、3,3’−ジアミノジフェニルエーテル、3,3’−ジメチル−4,4’−ジアミノジフェニルエーテル、3,3’−ジエトキシ−4,4’−ジアミノジフェニルエーテル等のジアミノジフェニルエーテル類;
4,4’−ジアミノジフェニルメタン、3,3’−ジアミノジフェニルメタン等のジアミノジフェニルメタン類;
2,2−ビス(3−アミノフェニル)プロパン、2,2−ビス(4−アミノフェニル)プロパン等の2,2−ビス(アミノフェニル)プロパン類;
2,2−ビス〔4−(4-アミノフェノキシ)フェニル〕プロパン、2,2−ビス〔4−(3-アミノフェノキシ)フェニル〕プロパン等の2,2−ビス(アミノフェノキシフェニル)プロパン類;
4,4’−ジアミノベンゾフェノン、3,3’−ジアミノベンゾフェノン等のジアミノベンゾフェノン類;
3,5’−ジアミノ安息香酸等のジアミノ安息香酸類;
1,3−フェニレンジアミン、1,4−フェニレンジアミン等のフェニレンジアミン類;
2,2’−ジクロロ−4,4’−ジアミノジフェニルエーテル等のジクロロジアミノジフェニルエーテル類;
オルトトリジン、メタトリジン等のトリジン類;
2,2’−ジヒドロキシ−4,4’−ジアミノビフェニル等のジヒドロキシジアミノビフェニル類;
4,4’−ジアミノ−2,2’,5,5’−テトラクロロビフェニル等のジアミノテトラクロロビフェニル類
等を挙げることができる。
6本の非対称中空糸膜と、ステンレスパイプと、エポキシ樹脂系接着剤とを使用して有効長が8cmの透過性能評価用のエレメントを作成し、これをステンレス容器に装着してペンシルモジュールとした。それにヘリウム、酸素、窒素標準混合ガス(容積比30:30:40)を1MPaGの圧力、50℃の温度で中空糸膜の外側に供給し、透過流量および透過ガス組成を測定した。ガス組成はガスクロマトグラフ分析により求めた。測定した透過流量、透過ガス組成、供給圧、および有効膜面積からヘリウムガス、酸素ガス、および窒素ガスの透過速度を算出した。
15本の非対称中空糸膜と、ステンレスパイプと、エポキシ樹脂系接着剤とを使用して有効長が10cmの透過性能評価用のエレメントを作成し、これをステンレス容器に装着してペンシルモジュールとした。前記のペンシルモジュールに透過対象ガスを、80℃の温度、1MPaGの圧力で中空糸膜の外側に供給し、透過流量を測定した。測定した透過ガス流量、供給側圧力、透過側圧力及び有効膜面積からガスの透過速度を算出した。
引張試験機を用いて有効長20mm、引張り速度10mm/分で測定した。測定は23℃で行った。中空糸断面積は中空糸の断面を光学顕微鏡で観察し、光学顕微鏡像から寸法を測定して算出した。
ポリイミド溶液の溶液粘度は、回転粘度計(ローターのずり速度1.75sec−1)を用い温度100℃で測定した。
NMP:N−メチル−2−ピロリドン
撹拌機と窒素ガス導入管が取り付けられたセパラブルフラスコに、6FDA 40ミリモルと、BPDA 60ミリモルと、HFBAPP 20ミリモルと、TSN 40ミリモルと、DADE 40ミリモルとを、ポリマー濃度が22重量%となるように溶媒のNMPと共に加え、窒素ガスをフラスコ内に流通させながら、撹拌下に反応温度190℃で14時間重合イミド化反応をおこない、ポリイミド濃度が22重量%の芳香族ポリイミド溶液を調製した。この芳香族ポリイミド溶液の100℃における溶液粘度は554ポイズであった。
この中空糸膜のガス透過性能と機械的特性を前記の方法によって測定した。結果を表2に示す。
撹拌機と窒素ガス導入管が取り付けられたセパラブルフラスコに、BPDA 40ミリモルと、6FDA 60ミリモルと、TSN 70ミリモルと、HFBAPP 30ミリモルとを、ポリマー濃度が17重量%となるように溶媒のPCPと共に加え、窒素ガスをフラスコ内に流通させながら、撹拌下に反応温度190℃で14時間重合イミド化反応をおこない、ポリイミド濃度が17重量%の芳香族ポリイミド溶液を調製した。この芳香族ポリイミド溶液の100℃における溶液粘度は1376ポイズであった。
表1に示した種類と、組成とを有するテトラカルボン酸成分およびジアミン成分を使用し、表1に示した濃度となるように表1に示した溶媒を使用したほかは実施例1と同様にして、それぞれの芳香族ポリイミドの溶液を調製した。そして、それらの各芳香族ポリイミド溶液から、表1に示した凝固液を使用し、表1に示した温度で最終的に加熱処理して中空糸膜を作成し、中空糸膜から糸束エレメントを形成し、次いで、それらの各中空糸膜の糸束エレメントからガス分離膜モジュールを形成した。但し、溶媒としてPCPを使用した実施例18は、実施例5と同様にして中空糸膜を作成し、中空糸膜から糸束エレメントを形成し、次いで、それらの各中空糸膜の糸束エレメントからガス分離膜モジュールを形成した。
これらの中空糸膜のガス透過性能と機械的特性を前記の方法によって測定した。結果を表2に示す。
表1に示した種類と、組成とを有するテトラカルボン酸成分およびジアミン成分を使用し、表1に示した濃度となるように表1に示した溶媒を使用したほかは実施例1または実施例5と同様にして、それぞれの芳香族ポリイミドの溶液を調製した。そして、溶媒としてNMPを使用した例では実施例1と同様に、PCPを使用した例では実施例5と同様にして、それらの各芳香族ポリイミド溶液から、表1に示した条件で中空糸膜を作成し、中空糸膜から糸束エレメントを形成し、次いで、それらの各中空糸膜の糸束エレメントからガス分離膜モジュールを形成した。
これらの中空糸膜のガス透過性能と機械的特性を前記の方法によって測定した。結果を表2に示す。
撹拌機と窒素ガス導入管が取り付けられたセパラブルフラスコに、6FDA 50ミリモルと、BPDA 50ミリモルと、TSN 50ミリモルと、TCB 50ミリモルとを、ポリマー濃度が21.5重量%となるように溶媒のNMPと共に加え、窒素ガスをフラスコ内に流通させながら、撹拌下に反応温度190℃で50時間重合イミド化反応をおこない、ポリイミド濃度が21.5重量%の芳香族ポリイミド溶液を調製した。しかしながら、この芳香族ポリイミドは重合性が良好でなく、芳香族ポリイミド溶液の100℃における溶液粘度は37ポイズに過ぎず、中空糸膜を得ることはできなかった。
−比較例1は、ユニットA2を含有しておらず、分離性能、即ち酸素ガス透過速度と窒素ガス透過速度との比(P’O2/P’N2)が劣る。
−比較例2は、同様にユニットA2を含有しておらず、酸素ガス透過速度(P’O2)が劣り、実用的な分離ができない。
−比較例3は、ユニットA1の含有量が規定の範囲を超えて過剰であり、分離性能(P’O2/P’N2)が劣っており、さらに引張り破断強度が不足し実用的でない。
−比較例4は、ユニットA1を含有しておらず、酸素ガス透過速度(P’O2)が劣り、特に引張り破断伸度が不足し実用的でない。
−比較例5は、ユニットB1およびユニットB2の含有量が規定の範囲外であり、分離性能(P’O2/P’N2)が劣り、さらに引張り破断強度が不足し実用的でない。
−比較例6は、ユニットA1を含有しておらず、酸素ガス透過速度(P’O2)が劣り、特に引張り破断伸度が不足し実用的でない。
−比較例7は、ユニットB1を含有しておらず、酸素ガス透過速度(P’O2)が著しく劣り、分離性能(P’O2/P’N2)も充分でない。
−比較例8は、ユニットA1を含有しておらず、酸素ガス透過速度(P’O2)が著しく劣る。
−比較例9は、ユニットA1を含有しておらず、アミド系溶媒での重合性が著しく劣る。
Claims (12)
- 下記一般式(1)で示される反復単位からなる可溶性の芳香族ポリイミドで形成されていることを特徴とする非対称ガス分離膜。
〔但し、一般式(1)のBは、
10〜70モル%の、下記一般式(B1)で示されるジフェニルヘキサフルオロプロパン構造に基づく4価のユニットB1、および
90〜30モル%の、下記一般式(B2)で示されるビフェニル構造に基づく4価のユニットB2
を含有し、
一般式(1)のAは、
10〜50モル%の、下記一般式(A1a)で示されるユニットおよび(A1b)で示されるユニットからなる群より選ばれるヘキサフルオロ置換構造に基づく2価のユニットA1、および
90〜30モル%の、下記一般式(A2a)で示される2価のユニット及び下記一般式(A2b)で示される2価のユニットからなる群より選ばれる含硫黄ヘテロ環構造に基づく2価のユニットA2を含有する。
- 前記ユニットA1が2,2−ビス〔4−(4−アミノフェノキシ)フェニル〕ヘキサフルオロプロパン、2,2−ビス(4−アミノフェニル)ヘキサフルオロプロパン、2,2−ビス(3−アミノ−4−ヒドロキシ)ヘキサフルオロプロパン、2,2’−ビス(トリフルオロメチル)−4,4’−ジアミノビフェニル、2,2’−ビス(トリフルオロメチル)−4,4’−ジアミノジフェニルエーテル、およびこれらの化合物の組み合わせからなる群より選ばれる化合物からアミノ基を除いた2価のユニットであることを特徴とする請求項1に記載の非対称ガス分離膜。
- 前記ユニットA2が、3,7−ジアミノ−ジメチルジベンゾチオフェン=5,5−ジオキシドからアミノ基を除いた2価のユニットであることを特徴とする請求項1または2に記載の非対称ガス分離膜。
- 前記一般式(1)のAは、前記ユニットA1、A2以外のジアミン成分に起因する2価のユニットA3を、50モル%以下の量で含有することを特徴とする請求項1〜3のいずれかに記載の非対称ガス分離膜。
- 非対称非多孔膜であることを特徴とする請求項1〜4のいずれかに記載の非対称ガス分離膜。
- 中空糸膜であることを特徴とする請求項1〜5のいずれかに記載の非対称ガス分離膜。
- 成膜時の芳香族ポリイミド溶液の溶媒が、アミド系溶媒であることを特徴とする請求項1〜6のいずれかに記載の非対称ガス分離膜。
- 成膜時に芳香族ポリイミド溶液を吐出する凝固液が、水、アミド系溶媒水溶液、およびエタノール水溶液からなる群より選ばれることを特徴とする請求項7に記載の非対称ガス分離膜。
- 酸素ガス透過速度(P’O2)が6.0×10−5cm3(STP)/cm2・sec・cmHg以上で且つ酸素ガス透過速度と窒素ガス透過速度との比(P’O2/P’N2)が4.0以上のガス分離性能を有することを特徴とする請求項1〜8のいずれかに記載の非対称ガス分離膜。
- 引張り破断伸度が10%以上であることを特徴とする請求項1〜9のいずれかに記載の非対称ガス分離膜。
- 請求項1〜10のいずれかに記載の非対称ガス分離膜を用いて、複数のガスを含む混合ガスから特定のガスを選択的に分離回収する方法。
- 請求項1〜10のいずれかの記載の非対称ガス分離膜を用いて、空気から酸素富化空気もしくは窒素富化空気を製造する方法。
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WO2011122668A1 (ja) * | 2010-03-30 | 2011-10-06 | 宇部興産株式会社 | 非対称ガス分離中空糸膜 |
US8366804B2 (en) * | 2010-05-28 | 2013-02-05 | Uop Llc | High permeance polyimide membranes for air separation |
US9718023B2 (en) | 2010-11-04 | 2017-08-01 | Ube Industries, Ltd. | Gas separation membrane module and gas separation method |
CN102527241B (zh) * | 2010-11-04 | 2015-11-04 | 宇部兴产株式会社 | 气体分离膜组件及气体分离方法 |
JP5915376B2 (ja) * | 2011-05-30 | 2016-05-11 | セントラル硝子株式会社 | 気体分離膜 |
JP5848154B2 (ja) * | 2012-02-17 | 2016-01-27 | 富士フイルム株式会社 | ガス分離複合膜、その製造方法、それを用いたガス分離モジュール、及びガス分離装置、並びにガス分離方法 |
JP6035972B2 (ja) * | 2012-08-06 | 2016-11-30 | Jsr株式会社 | 細胞凝集体の形成方法及び細胞凝集体形成用基材の製造方法 |
JP6142730B2 (ja) * | 2012-09-25 | 2017-06-07 | 宇部興産株式会社 | 非対称中空糸ガス分離膜、及びガス分離方法 |
US9056285B2 (en) * | 2012-11-28 | 2015-06-16 | Central Glass Company, Limited | Gas separation membrane |
US9050566B2 (en) * | 2012-11-28 | 2015-06-09 | Central Glass Company, Limited | Gas separation membrane |
JP6194773B2 (ja) * | 2012-11-28 | 2017-09-13 | セントラル硝子株式会社 | 気体分離膜 |
FR3011484B1 (fr) * | 2013-10-09 | 2017-06-23 | Air Liquide | Dispositif de separation d'air, dispositif d'inertage et aeronef comprenant un tel dispositif |
CN106132522A (zh) * | 2014-03-27 | 2016-11-16 | 宇部兴产株式会社 | 不对称气体分离膜、及分离回收气体的方法 |
JP6623600B2 (ja) * | 2015-07-28 | 2019-12-25 | 宇部興産株式会社 | 非対称ガス分離膜、及びガスを分離回収する方法 |
TWI609897B (zh) * | 2017-02-15 | 2018-01-01 | 律勝科技股份有限公司 | 聚醯亞胺樹脂及其製造方法與薄膜 |
CN107913580A (zh) * | 2017-11-15 | 2018-04-17 | 中国科学院长春应用化学研究所 | 一种聚酰亚胺在气体分离中的应用 |
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JP2004516131A (ja) * | 2000-12-19 | 2004-06-03 | レール・リキード−ソシエテ・アノニム・ア・ディレクトワール・エ・コンセイユ・ドゥ・スールベイランス・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | コポリイミドガス分離膜 |
JP2004267810A (ja) * | 2003-03-05 | 2004-09-30 | Ube Ind Ltd | 非対称ガス分離膜 |
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JPWO2010038810A1 (ja) | 2012-03-01 |
CN102227252A (zh) | 2011-10-26 |
US8409325B2 (en) | 2013-04-02 |
WO2010038810A1 (ja) | 2010-04-08 |
CN102227252B (zh) | 2014-08-20 |
US20110232484A1 (en) | 2011-09-29 |
EP2335815A4 (en) | 2013-10-02 |
EP2335815A1 (en) | 2011-06-22 |
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