JP6642932B2 - 混合カチオンLiCa−LSX分子篩の製造方法及び応用 - Google Patents
混合カチオンLiCa−LSX分子篩の製造方法及び応用 Download PDFInfo
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- 239000002808 molecular sieve Substances 0.000 title claims description 74
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims description 74
- 238000004519 manufacturing process Methods 0.000 title claims description 32
- 150000001768 cations Chemical class 0.000 title claims description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 125000002091 cationic group Chemical group 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 10
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 8
- 229910001416 lithium ion Inorganic materials 0.000 claims description 8
- 239000003463 adsorbent Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000012065 filter cake Substances 0.000 claims description 4
- 238000000967 suction filtration Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000007858 starting material Substances 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000047 product Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 21
- 238000001179 sorption measurement Methods 0.000 description 20
- 238000012360 testing method Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 208000005156 Dehydration Diseases 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- -1 medical treatment Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 229910001413 alkali metal ion Inorganic materials 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000012013 faujasite Substances 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000341 volatile oil Substances 0.000 description 1
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Description
ステップ1、CaLSX分子篩の製造
CaLSX分子篩の製造過程において、Ca2+を含有する溶液で複数回交換してNaLSX分子篩におけるNa+のすべてを室温でCa2+に交換して、洗浄して表面に付着したCa2+とCl−を除去し、洗浄した濾過ケーキを乾燥させてCaLSX分子篩を得る。
具体的に、該Ca2+を含有する溶液は一般的に使用されるCa2+を含有する塩溶液、好ましくはCaCl2溶液であり、Ca2+を含有する溶液を用いて複数回、好ましくは6回交換する方法は使用されており、1回ごとの交換時間は6時間以上であり、好ましくは、前の数回の交換用の交換液は次のバッチのCa2+からCaLSXへの交換過程に用いられる。
より具体的に、Ca2+を含有する溶液のCa2+濃度は1.0Mである。
ステップ2:CaLSX分子篩をLi+で交換してLiCa−LSX分子篩にし、得られたLiCa−LSX分子篩のLi+イオンのモル百分率含有量範囲を2−5%に制御する。
Li+交換によるCaLi−LSX分子篩の製造過程において、Li+の出発物質の量がそれぞれCaLSX原料粉末に含まれるCa2+の0.15−0.3倍になるように、CaLSX分子篩をLi+を含有する溶液に添加し、Li+を含有する溶液を用いて、室温で0.5−2時間、好ましくは1時間交換を行い、交換したサンプルを洗浄せずに、直接真空吸引濾過を行って、常温で乾燥させる。Li+を含有する溶液の添加量を制御することによって、製造された混合カチオンLiCa−LSX分子篩のLi+イオンのモル百分率含有量を2−5%にする。
ここで、前記Li+イオンのモル百分率含有量とは、ICP検出際に添加された混合カチオン分子篩原料粉末の乾物質量に対するLi+イオン量の百分率を意味する。
該Li+を含有する溶液は一般的に使用されるLi+を含有する塩溶液、好ましくはLiCl溶液であり、
より具体的に、Li+を含有する溶液のLi+濃度は1.0Mである。
ステップ3:サンプルの活性化前処理
常温で乾燥させた生成物を5−15℃/minの昇温速度で、最高温度を330−350℃として加熱して、0.5−3時間、好ましくは1時間脱気し、脱気終了後、室温に自然冷却させて、混合カチオンLiCa−LSX分子篩を得る。
一、本発明では、前記Li交換過程に希LiCl溶液を用いるため、濾過時に水洗を必要としないことで、加水分解によりH+がLi+を置換してLi+の損失を引き起こすことを回避できる。
二、本発明では、Ca2+でLiLSXにおけるLi+を交換するのではなく、Li+でCaLSX分子篩におけるCa2+を交換する。X型分子篩のイオン交換には、Li+はNa+を分子篩骨格から直接交換するのが困難であるため、まずLi+を交換すると交換しにくく、Li+イオン利用率が低いという問題があるのに対して、まずCa2+を交換して、次にLi+でCa2+を交換すると、低Li+交換度の場合であってもLi+の使用量が制御されやすい。
三、本発明では、交換過程において、Li+交換度が低く、使用量が少なく、コストの制御が容易である。Li溶液の添加量を制御することによって、Li+交換度を制御することにより、交換液中のLi+含有量の交換度を低下させる。本発明により合成されるサンプルは、交換度が比較的低く、少量のLi+で求められる交換度を満足できることから、低交換度では、必要なLi+使用量を大幅に減少させる。
四、本発明では、LiLSX分子篩の十分な脱水に適する最低活性化温度が採用されるので、処理時間が短く、Li+の低位置(SI、SII)への移動を防止して、Li+がSIIサイトに存在することを確実に確保できる。
1、Na−LSXからCa−LSXへの交換
ガラスビーカーを用いて、1回に6時間交換するように、25℃の交換液温度で缶式交換を行い、具体的には、
NaLSX原料粉末(乾燥ベース)50gを濃度1.0MのCaCl2溶液88mLに加えて、磁気撹拌器で混合して撹拌し、1回に6時間交換するように、6回繰り返して交換し、最後に脱イオン水500mLを用いて真空吸引濾過瓶において吸引濾過して洗浄し、濾過ケーキを25℃のオーブン内で乾燥させる。
ガラスビーカーを用いて、1回に6時間交換するように、25℃の交換液温度で缶式交換を行い、具体的には、
2つのガラスビーカーにそれぞれ上記製造されたCaLSX原料粉末1.5gを投入して、LiCl溶液0.1Mを用いてそれぞれ交換し、ビーカー内のLi+の出発物質の量をそれぞれCaLSX原料粉末に含まれるCa2+の0.15−0.3倍に制御し、25℃の交換液温度で、1時間磁気撹拌して、溶液のpH値を調整せずに済んだ。交換した固液混合物をブフナー漏斗内に投入して真空吸引濾過を行い、浄水で洗浄せずに、濾過ケーキを25℃で24時間乾燥させた。交換した混合カチオン分子篩原料粉末の化学組成について誘導結合プラズマ発光分光分析装置(ICP−OES)により検出した結果、Li+の交換度はそれぞれ2.5%と4.2%(乾燥ベースでのモル百分率含有量)であり、それぞれLi2.5Ca46.75−LSX及びLi4.2Ca45.9−LSXと命名される。
サンプルについて、等温線をテストする前に脱水処理を行い、具体的に、
マイクロメリティクス製ASAP 3020吸着装置に備えた脱気活性化装置を用いて、原位置で脱気/脱水処理を行い、Li2.5Ca46.75−LSX及びLi4.2Ca45.9−LSXの2種の混合カチオン分子篩について、350℃の条件において1時間脱水処理し、Li−LSX及びCa−LSX分子篩についてそれぞれ375℃と350℃の条件において8時間処理し、サンプルの処理過程にいずれも昇温速度を10℃/minにし、処理後に室温に自然冷却させた。混合カチオンに対する短い前処理はLi+の低サイト(SI、SII)への移動の防止に有利である。
マイクロメリティクス製ASAP 3020吸着装置を用いて、それぞれ25℃、50℃、70℃のテスト温度、1atmのテスト圧力で吸着等温線テストを行う。テスト結果は図2−図7に示されている。
Claims (4)
- 混合カチオンLiCa−LSX分子篩の製造方法であって、
CaLSX分子篩の製造過程において、Ca2+を含有する溶液で室温で複数回交換してNaLSX分子篩におけるNa+のすべてをCa2+に交換して、洗浄して表面に付着したCa2+とCl−を除去し、洗浄した濾過ケーキを乾燥させてCaLSX分子篩を得る、CaLSX分子篩製造のステップ1と、
CaLSX分子篩についてLi+交換をしてLiCa−LSX分子篩にし、具体的に、Li+交換によるCaLi−LSX分子篩の製造過程において、Li+の出発物質の量がそれぞれCaLSX原料粉末に含まれるCa2+の0.15−0.3倍になるように、CaLSX分子篩をLi+を含有する溶液に添加し、Li+を含有する溶液を用いて、室温で0.5−2時間交換を行い、交換したサンプルを洗浄せずに、直接真空吸引濾過を行って常温で乾燥させ、得られたLiCa−LSX分子篩のLi+イオンのモル百分率含有量の範囲を2−5%にするステップ2と、
常温で乾燥させた生成物を5−15℃/minの昇温速度で、最高温度を330−350℃として加熱し、0.5−3時間脱気し、脱気終了後、室温に自然冷却させて、混合カチオンLiCa−LSX分子篩を得るサンプルの活性化前処理のステップ3とを含むことを特徴とする製造方法。 - 前記Li+を含有する溶液はLiCl溶液であることを特徴とする請求項1に記載の混合カチオンLiCa−LSX分子篩の製造方法。
- 前記NaLSX分子篩はシリカ/アルミナ比SiO2/Al2O3が2.0の分子篩原料粉末であることを特徴とする請求項1に記載の混合カチオンLiCa−LSX分子篩の製造方法。
- 請求項1に記載の製造方法により製造された混合カチオンLiCa−LSX分子篩を、N 2 とO 2 の選択的吸着剤として用いることを特徴とする、PSA/VPSA酸素製造方法。
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