JPWO2020066639A1 - 亜酸化窒素の精製方法 - Google Patents
亜酸化窒素の精製方法 Download PDFInfo
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- JPWO2020066639A1 JPWO2020066639A1 JP2020548413A JP2020548413A JPWO2020066639A1 JP WO2020066639 A1 JPWO2020066639 A1 JP WO2020066639A1 JP 2020548413 A JP2020548413 A JP 2020548413A JP 2020548413 A JP2020548413 A JP 2020548413A JP WO2020066639 A1 JPWO2020066639 A1 JP WO2020066639A1
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- Prior art keywords
- nitrous oxide
- gas
- purifying
- gas separation
- separation membrane
- Prior art date
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- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 title claims abstract description 240
- 239000001272 nitrous oxide Substances 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000000746 purification Methods 0.000 title description 7
- 238000000926 separation method Methods 0.000 claims abstract description 83
- 239000012528 membrane Substances 0.000 claims abstract description 77
- 239000002861 polymer material Substances 0.000 claims abstract description 9
- 239000012466 permeate Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 219
- 229920001721 polyimide Polymers 0.000 claims description 26
- 239000004642 Polyimide Substances 0.000 claims description 25
- 125000003118 aryl group Chemical group 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 23
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 16
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 16
- 125000000962 organic group Chemical group 0.000 claims description 14
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 229910001868 water Inorganic materials 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 229910021529 ammonia Inorganic materials 0.000 claims description 8
- -1 aromatic tetracarboxylic acid Chemical class 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000002808 molecular sieve Substances 0.000 claims description 5
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 5
- 150000004984 aromatic diamines Chemical class 0.000 claims description 4
- WKXNTUKZVVFSIN-UHFFFAOYSA-N S(=O)([O-])[O-].[NH4+].S(=O)(O)O.[NH4+].S(=O)(O)O Chemical compound S(=O)([O-])[O-].[NH4+].S(=O)(O)O.[NH4+].S(=O)(O)O WKXNTUKZVVFSIN-UHFFFAOYSA-N 0.000 claims 1
- 239000012510 hollow fiber Substances 0.000 description 31
- 239000012535 impurity Substances 0.000 description 12
- 238000004821 distillation Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 229920002050 silicone resin Polymers 0.000 description 9
- 239000002994 raw material Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 150000002894 organic compounds Chemical class 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000001361 adipic acid Substances 0.000 description 3
- 235000011037 adipic acid Nutrition 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000001891 gel spinning Methods 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000002798 polar solvent Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- MHDWQCSVXCLPGW-UHFFFAOYSA-N dibenzothiophene-1,2-diamine Chemical class C1=CC=C2C3=C(N)C(N)=CC=C3SC2=C1 MHDWQCSVXCLPGW-UHFFFAOYSA-N 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical group C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 2
- FDPIMTJIUBPUKL-UHFFFAOYSA-N pentan-3-one Chemical compound CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- CFTSORNHIUMCGF-UHFFFAOYSA-N (1,1,1,3,3,3-hexafluoro-2-phenylpropan-2-yl)benzene Chemical group C=1C=CC=CC=1C(C(F)(F)F)(C(F)(F)F)C1=CC=CC=C1 CFTSORNHIUMCGF-UHFFFAOYSA-N 0.000 description 1
- QTUPNQLYKZXIMM-UHFFFAOYSA-N 1,2-diamino-10,10-dioxothioxanthen-9-one Chemical class C1=CC=C2S(=O)(=O)C3=CC=C(N)C(N)=C3C(=O)C2=C1 QTUPNQLYKZXIMM-UHFFFAOYSA-N 0.000 description 1
- 150000005206 1,2-dihydroxybenzenes Chemical class 0.000 description 1
- RCPSBADIVDBFLI-UHFFFAOYSA-N 10,10-dioxo-9h-thioxanthene-2,7-diamine Chemical compound NC1=CC=C2S(=O)(=O)C3=CC=C(N)C=C3CC2=C1 RCPSBADIVDBFLI-UHFFFAOYSA-N 0.000 description 1
- UPVRZVIJGVFROW-UHFFFAOYSA-N 10,10-dioxo-9h-thioxanthene-3,6-diamine Chemical compound C1=C(N)C=C2S(=O)(=O)C3=CC(N)=CC=C3CC2=C1 UPVRZVIJGVFROW-UHFFFAOYSA-N 0.000 description 1
- ZPBBGGSLVCAGMH-UHFFFAOYSA-N 2,7-diamino-10,10-dioxothioxanthen-9-one Chemical compound NC1=CC=C2S(=O)(=O)C3=CC=C(N)C=C3C(=O)C2=C1 ZPBBGGSLVCAGMH-UHFFFAOYSA-N 0.000 description 1
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-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
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 229910000416 bismuth oxide Inorganic materials 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- OMBRFUXPXNIUCZ-UHFFFAOYSA-N dioxidonitrogen(1+) Chemical compound O=[N+]=O OMBRFUXPXNIUCZ-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000001905 inorganic group Chemical group 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
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- 239000011148 porous material Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
Description
特許文献2には、N2Oを含むガスから重質不純物を吸着によって除去した後、圧縮・液化して液体混合物から蒸発を介して軽質不純物および有機化合物を除去するN2Oの回収精製方法が記載されている。
[1]亜酸化窒素を含む混合ガスを、高分子材料からなるガス分離膜に導入して、選択的に亜酸化窒素を透過させるガス分離を行う工程を有することを特徴とする亜酸化窒素の精製方法。
[2]前記高分子材料が、芳香族ポリイミドである前記[1]に記載の亜酸化窒素の精製方法。
[3]前記芳香族ポリイミドが、下記式(1)に示す反復単位を有する前記[2]に記載の亜酸化窒素の精製方法。
[4]前記式(1)に示す反復単位において、A1が、下記式(2)に示す4価の基、下記式(3)に示す4価の基、および下記式(4)に示す4価の基から選ばれる少なくとも1種であり、A2が、下記式(5)に示す2価の基、下記式(6)に示す2価の基、下記式(7)に示す2価の基、および下記式(8)に示す2価の基から選ばれる少なくとも1種である前記[3]に記載の亜酸化窒素の精製方法。
[6]亜酸化窒素を含む前記混合ガスの前記ガス分離膜への導入圧力が、1.5MPaG未満である前記[1]〜[5]のいずれか1項に記載の亜酸化窒素の精製方法。
[7]亜酸化窒素を含む前記混合ガスの前記ガス分離膜への導入温度が、40℃未満である前記[1]〜[6]のいずれか1項に記載の亜酸化窒素の精製方法。
[8]亜酸化窒素を含む前記混合ガスが、窒素、酸素、一酸化窒素、二酸化窒素、アンモニアおよび水から選ばれる少なくとも1種の他のガス成分をさらに含む前記[1]〜[7]のいずれか1項に記載の亜酸化窒素の精製方法。
[9]前記ガス分離を行うことにより得られた亜酸化窒素を含む透過ガスを、高分子材料からなるガス分離膜に導入して、選択的に亜酸化窒素を透過させるガス分離をさらに行う工程を有する前記[1]〜[8]のいずれか1項に記載の亜酸化窒素の精製方法。
[10]亜酸化窒素を含む前記混合ガスを前記ガス分離膜へ導入する前に、亜酸化窒素を含む前記混合ガスを予めアルカリ化合物を含む水溶液に接触させ、次いでモレキュラーシーブに接触させる工程を有する前記[1]〜[9]のいずれか1項に記載の亜酸化窒素の精製方法。
[11]前記ガス分離を行うことにより得られた亜酸化窒素を含む透過ガスを、液化し蒸留する工程を有する前記[1]〜[10]のいずれか1項に記載の亜酸化窒素の精製方法。
[12]前記[1]〜[11]のいずれか1項に記載の亜酸化窒素の精製方法により精製した亜酸化窒素を、容器に封入することを特徴とする精製亜酸化窒素を含む容器の製造方法。
本発明の亜酸化窒素の精製方法は、亜酸化窒素を含む混合ガスを、高分子材料からなるガス分離膜に導入して、選択的に亜酸化窒素を透過させるガス分離を行う工程を有することを特徴とする。本発明では、亜酸化窒素を含む混合ガス中からの亜酸化窒素回収率が高い。
ガス分離膜は、複数の中空糸膜からなることが好ましい。中空糸は、内径が好ましくは10〜3000μmであり、外径が好ましくは30〜7000μmである。また、中空糸の長さは、混合ガスの処理量に応じて選択でき、例えば100〜3000mmを挙げることができるが、好ましくは200〜500mmである。
ガス分離膜モジュールとしてはカートリッジ型を用いることが好ましい。
以下、ガス分離膜、特に中空糸膜の形成材料として好適な芳香族ポリイミドについて説明する。芳香族ポリイミドは、下記式(1)に示す反復単位を有することが好ましい。
式(1)に示す反復単位100モル%中、A2が式(5)に示す基および式(6)に示す基である単位の含有割合の合計は、好ましくは30〜90モル%、より好ましくは50〜80モル%であり;A2が式(7)に示す基である単位の含有割合は、好ましくは5〜50モル%、より好ましくは10〜40モル%であり;A2が式(8)に示す基である単位の含有割合は、好ましくは5〜20モル%、より好ましくは10〜15モル%である。
以下、ガス分離膜、特に中空糸膜の形成材料として好適なシリコーン樹脂について説明する。シリコーン樹脂で形成されている中空糸膜は、芳香族ポリイミドで形成されている中空糸膜と同様な特性を有する。
亜酸化窒素を含む混合ガス中の亜酸化窒素濃度は、好ましくは5〜90vol%、より好ましくは10〜80vol%であり、分離膜モジュールの本数と精製効率の両者を有利にするために、30vol%以上とすることが更に好ましい。また、本発明は、亜酸化窒素濃度が60vol%以下または50vol%以下という低濃度であっても、効率よく亜酸化窒素を精製することができる。なお、ガス分離膜へ初めて導入される混合ガスを「原料ガス」ともいい、前記混合ガス中の亜酸化窒素濃度は、通常は原料ガス中の亜酸化窒素濃度である。
なお、多段でガス分離を行う場合は、それぞれのガス分離膜への混合ガス(例えば原料ガス、透過ガス)の導入時の圧力および温度が上記範囲にあることが好ましい。
7vol%の酸素、58.1vol%の窒素を含む亜酸化窒素混合ガス(原料ガス;亜酸化窒素濃度34.9vol%)をボンベ内に調製し、図2に示すフローで0.5MPaG、0.7MPaGおよび0.9MPaGでの透過実験を行った。ガス分離膜を有する透過モジュールとして宇部興産製CO2分離モジュールCO−B01を用いた。前記モジュールCO−B01に使用される芳香族ポリイミドは、少なくとも前記式(3)および式(4)で表される構造を有している。マスフローコントローラー(MFC)を用いて、非透過ガスのガス流量が約20L/minとなるように調整した。透過ガスおよび非透過ガスのガス流量を流量計にて測定し、ガス組成はガスクロマトグラフを用いて分析し、表1に示す結果となった。
26.5vol%の酸素、16.6vol%の窒素を含む亜酸化窒素混合ガス(原料ガス;亜酸化窒素濃度56.9vol%)をボンベ内に調製し、図2に示すフローで0.5MPaG、0.7MPaGおよび0.9MPaGでの透過実験を行った。ガス分離膜を有する透過モジュールとして宇部興産製CO2分離モジュールCO−B01を用いた。マスフローコントローラーを用いて、非透過ガスのガス流量が約20L/minとなるように調整した。透過ガスおよび非透過ガスのガス流量を流量計にて測定し、ガス組成はガスクロマトグラフを用いて分析し、表2に示す結果となった。
7vol%の酸素、58.1vol%の窒素を含む亜酸化窒素混合ガス(原料ガス;亜酸化窒素濃度34.9vol%)をボンベ内に調製し、図3に示すフローで0.5MPaG、0.7MPaGおよび0.9MPaGでの透過実験を行った。ガス分離膜を有する透過モジュールとして宇部興産製CO2分離モジュールCO−B01を1段目は2本並列に、2段目は1段目に対して直列に接続して用いた。マスフローコントローラーを用いて、非透過ガスのガス流量が約20L/minとなるように調整した。2段目の透過ガスおよび非透過ガスのガス流量を流量計にて測定し、ガス組成はガスクロマトグラフを用いて分析し、表3に示す結果となった。
N2=55vol%,O2=4vol%,NO2=0.5vol%,NO=0.5vol%,CO2=2vol%,NH3=0.1vol%,水=5.9vol%を含む亜酸化窒素混合ガス(亜酸化窒素濃度32vol%)をボンベ内に調製し、図4に示すフローでアルカリ洗浄(10質量%NAOH水溶液)と脱水塔(モレキュラーシーブ3A(MS−3A)を備える乾燥塔)を通じた後に、0.5MPaG、0.7MPaG、0.9MPaGにて透過モジュールを透過させた。透過モジュールとして宇部興産製CO2分離モジュールCO−B01を1段目は2本並列に、2段目は1段目に対して直列に接続して用いた。マスフローコントローラーを用いて、非透過ガスのガス流量が約20L/minとなるように調整した。2段目の透過ガスを、冷媒を用いて−78℃で冷却液化し、製品タンクに貯蔵した。製品タンクへの貯蔵が完了した後、製品タンクを−78℃に保持しながら亜酸化窒素貯蔵量全体の1割相当分をガスでブローする深冷分離による蒸留を実施した。
26.5vol%の酸素、16.6vol%の窒素を含む亜酸化窒素混合ガス(原料ガス;亜酸化窒素濃度56.9vol%)をボンベ内に調製し、図2に示すフローで0.2MPaGでの透過実験を行った。透過モジュールとして永柳工業製シリコーン樹脂膜(M40−6000)を用いた。マスフローコントローラーを用いて、非透過ガスのガス流量が約10L/minとなるように調整した。透過ガスおよび非透過ガスのガス流量を流量計にて測定し、ガス組成はガスクロマトグラフを用いて分析し、表5に示す結果となった。
N2O回収率は、実施例1〜3の宇部興産製CO2分離モジュールCO−B01を使用した場合に及ばなかったが、透過ガスのN2O濃度は十分に高い結果となった。
Claims (12)
- 亜酸化窒素を含む混合ガスを、高分子材料からなるガス分離膜に導入して、選択的に亜酸化窒素を透過させるガス分離を行う工程を有することを特徴とする亜酸化窒素の精製方法。
- 前記高分子材料が、芳香族ポリイミドである請求項1に記載の亜酸化窒素の精製方法。
- 前記式(1)に示す反復単位において、A1が、下記式(2)に示す4価の基、下記式(3)に示す4価の基、および下記式(4)に示す4価の基から選ばれる少なくとも1種であり、A2が、下記式(5)に示す2価の基、下記式(6)に示す2価の基、下記式(7)に示す2価の基、および下記式(8)に示す2価の基から選ばれる少なくとも1種である請求項3に記載の亜酸化窒素の精製方法。
- 亜酸化窒素を含む前記混合ガス中の亜酸化窒素濃度が、5〜90vol%である請求項1〜4のいずれか1項に記載の亜酸化窒素の精製方法。
- 亜酸化窒素を含む前記混合ガスの前記ガス分離膜への導入圧力が、1.5MPaG未満である請求項1〜5のいずれか1項に記載の亜酸化窒素の精製方法。
- 亜酸化窒素を含む前記混合ガスの前記ガス分離膜への導入温度が、40℃未満である請求項1〜6のいずれか1項に記載の亜酸化窒素の精製方法。
- 亜酸化窒素を含む前記混合ガスが、窒素、酸素、一酸化窒素、二酸化窒素、アンモニアおよび水から選ばれる少なくとも1種の他のガス成分をさらに含む請求項1〜7のいずれか1項に記載の亜酸化窒素の精製方法。
- 前記ガス分離を行うことにより得られた亜酸化窒素を含む透過ガスを、高分子材料からなるガス分離膜に導入して、選択的に亜酸化窒素を透過させるガス分離をさらに行う工程を有する請求項1〜8のいずれか1項に記載の亜酸化窒素の精製方法。
- 亜酸化窒素を含む前記混合ガスを前記ガス分離膜へ導入する前に、亜酸化窒素を含む前記混合ガスを予めアルカリ化合物を含む水溶液に接触させ、次いでモレキュラーシーブに接触させる工程を有する請求項1〜9のいずれか1項に記載の亜酸化窒素の精製方法。
- 前記ガス分離を行うことにより得られた亜酸化窒素を含む透過ガスを、液化し蒸留する工程を有する請求項1〜10のいずれか1項に記載の亜酸化窒素の精製方法。
- 請求項1〜11のいずれか1項に記載の亜酸化窒素の精製方法により精製した亜酸化窒素を、容器に封入することを特徴とする精製亜酸化窒素を含む容器の製造方法。
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KR20180010366A (ko) * | 2016-07-20 | 2018-01-31 | 한국화학연구원 | 아산화질소 함유 기체 혼합물로부터 아산화질소의 회수 및 정제공정 |
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EP2411122A4 (en) * | 2009-03-26 | 2012-08-22 | Eco Bio Technologies Pty Ltd | METHOD FOR SEPARATING GASES |
US10464813B2 (en) | 2013-06-18 | 2019-11-05 | Versum Materials Us, Llc | Process for recovery and purification of nitrous oxide |
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JPH05508103A (ja) * | 1990-04-03 | 1993-11-18 | ヘキスト・セラニーズ・コーポレーション | ポリイミドポリマーの混和性ブレンドを含むガス分離膜 |
JP2000239007A (ja) * | 1999-02-17 | 2000-09-05 | L'air Liquide | 廃ガス中に含まれた亜酸化窒素の回収浄化方法および回収浄化装置 |
WO2009091062A1 (ja) * | 2008-01-18 | 2009-07-23 | Ube Industries, Ltd. | 耐溶剤性非対称中空糸ガス分離膜およびその製造方法 |
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JP2017029871A (ja) * | 2015-07-28 | 2017-02-09 | 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 |
KR101748609B1 (ko) * | 2016-06-30 | 2017-06-21 | 한국화학연구원 | 아산화질소 선택성 기체 분리막 및 이를 이용한 아산화질소 정제방법 |
KR20180010366A (ko) * | 2016-07-20 | 2018-01-31 | 한국화학연구원 | 아산화질소 함유 기체 혼합물로부터 아산화질소의 회수 및 정제공정 |
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CN112533866A (zh) | 2021-03-19 |
US20210309520A1 (en) | 2021-10-07 |
TW202028109A (zh) | 2020-08-01 |
KR20210025659A (ko) | 2021-03-09 |
EP3858786A4 (en) | 2022-06-22 |
WO2020066639A1 (ja) | 2020-04-02 |
EP3858786A1 (en) | 2021-08-04 |
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