JP7113072B2 - ゼオライト膜複合体の製造方法 - Google Patents
ゼオライト膜複合体の製造方法 Download PDFInfo
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- JP7113072B2 JP7113072B2 JP2020508142A JP2020508142A JP7113072B2 JP 7113072 B2 JP7113072 B2 JP 7113072B2 JP 2020508142 A JP2020508142 A JP 2020508142A JP 2020508142 A JP2020508142 A JP 2020508142A JP 7113072 B2 JP7113072 B2 JP 7113072B2
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- Prior art keywords
- zeolite membrane
- support
- zeolite
- less
- producing
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- QHMQWEPBXSHHLH-UHFFFAOYSA-N sulfur tetrafluoride Chemical compound FS(F)(F)F QHMQWEPBXSHHLH-UHFFFAOYSA-N 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
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Description
好ましくは、前記距離は、前記ゼオライト膜が形成される表面近傍における前記支持体 の平均細孔径の50倍以下である。
アルミニウム源、リン源、SDA(構造規定剤)として、それぞれアルミニウムイソプロポキシド、85%リン酸、水酸化1,4-ジアザビシクロ[2.2.2]オクタン-C4-ジクアットを純水に溶解させ、組成が1Al2O3:1P2O5:0.8SDA:200H2Oの原料溶液を作製した。当該原料溶液を190℃にて50時間水熱合成した。当該水熱合成によって得られた原結晶を回収し、純水にて十分に洗浄した後、100℃で乾燥させた。X線回折測定の結果、得られた原結晶はSAT型ゼオライトの結晶であった。
モノリス型のアルミナ製多孔質支持体11を準備した。ゼオライト膜が形成される表面近傍における支持体11の平均細孔径は0.1μmである。支持体11を種結晶を分散させた溶液に浸漬し、種結晶を支持体11の各貫通孔111の内側面に付着させた。その後、アルミニウム源、リン源、SDAとして、それぞれアルミニウムイソプロポキシド、85%リン酸、水酸化1,4-ジアザビシクロ[2.2.2]オクタン-C4-ジクアットを純水に溶解させ、組成が1Al2O3:2P2O5:2.3SDA:1000H2Oの原料溶液を作製した。
次に、図5に概略構造を示す装置にて混合ガスの分離試験を実施した。上述のように、ゼオライト膜12は、支持体11が有する複数の貫通孔111の内側面に形成されている。支持体11の両端部はガラス21にて封止され、支持体11は外筒22内に収められる。この状態で、混合ガスが矢印251にて示すように支持体11の各貫通孔111内に導入され、外筒22に設けられた第2排出ポート223からゼオライト膜12を透過したガスが矢印253にて示すように回収される。
11 支持体
12 ゼオライト膜
113 (支持体とゼオライト膜との)界面
S11~S15,S111,S112 ステップ
Claims (6)
- ゼオライト膜複合体の製造方法であって、
a)水熱合成にてゼオライトを生成し、前記ゼオライトから種結晶を取得する工程と、
b)多孔質の支持体上に前記種結晶を付着させる工程と、
c)原料溶液に前記支持体を浸漬し、水熱合成により前記種結晶からゼオライトを成長させて前記支持体上にゼオライト膜を形成する工程と、
を備え、
前記a)工程は、
a1)第1の回転数にて回転するボールミルまたはビーズミルにより原結晶を粉砕する工程と、
a2)前記a1)工程にて粉砕された前記原結晶を、前記第1の回転数よりも低い第2の回転数にて回転するボールミルまたはビーズミルにより粉砕する工程と、
を含み、
前記a1)工程および前記a2)工程における前記原結晶の合計粉砕時間は7日以下であり、
前記a)工程において取得される前記種結晶の比表面積が、10m 2 /g以上かつ150m 2 /g以下であり、
前記種結晶にX線を照射して得られるX線回折パターンにおいて、回折角2θ=12°~25°の範囲にて最大ピークを示す回折角2θにおける結晶成分による強度が、アモルファス成分による強度の1倍以上かつ30倍以下であり、
前記ゼオライト膜の一部が、前記ゼオライト膜と前記支持体との界面から前記支持体の気孔内に浸入しており、
前記界面に垂直な深さ方向に関し、前記支持体の内部における前記ゼオライト膜を構成する一の主要元素について、前記ゼオライト膜中における原子百分率Aに対する、前記支持体内部における原子百分率Bを前記支持体の気孔率Cで除算した値の比(B/C)/Aが0.8である位置と、前記界面との間の距離が0.01μm以上かつ5μm以下であることを特徴とするゼオライト膜複合体の製造方法。 - 請求項1に記載のゼオライト膜複合体の製造方法であって、
前記距離が4μm以下であることを特徴とするゼオライト膜複合体の製造方法。 - 請求項2に記載のゼオライト膜複合体の製造方法であって、
前記距離が3μm以下であることを特徴とするゼオライト膜複合体の製造方法。 - 請求項1ないし3のいずれか1つに記載のゼオライト膜複合体の製造方法であって、
前記距離が、前記ゼオライト膜が形成される表面近傍における前記支持体の平均細孔径の50倍以下であることを特徴とするゼオライト膜複合体の製造方法。 - ゼオライト膜複合体の製造方法であって、
a)水熱合成にてゼオライトを生成し、前記ゼオライトから種結晶を取得する工程と、
b)多孔質の支持体上に前記種結晶を付着させる工程と、
c)原料溶液に前記支持体を浸漬し、水熱合成により前記種結晶からゼオライトを成長させて前記支持体上にゼオライト膜を形成する工程と、
を備え、
前記a)工程は、
a1)第1の回転数にて回転するボールミルまたはビーズミルにより原結晶を粉砕する工程と、
a2)前記a1)工程にて粉砕された前記原結晶を、前記第1の回転数よりも低い第2の回転数にて回転するボールミルまたはビーズミルにより粉砕する工程と、
を含み、
前記a1)工程および前記a2)工程における前記原結晶の合計粉砕時間は7日以下であり、
前記a)工程において取得される前記種結晶の比表面積が、10m 2 /g以上かつ150m 2 /g以下であり、
前記種結晶にX線を照射して得られるX線回折パターンにおいて、回折角2θ=12°~25°の範囲にて最大ピークを示す回折角2θにおける結晶成分による強度が、アモルファス成分による強度の1倍以上かつ30倍以下であり、
前記ゼオライト膜の一部が、前記ゼオライト膜と前記支持体との界面から前記支持体の気孔内に浸入しており、
前記界面に垂直な深さ方向に関し、前記支持体の内部における前記ゼオライト膜を構成する一の主要元素について、前記ゼオライト膜中における原子百分率Aに対する、前記支持体内部における原子百分率Bを前記支持体の気孔率Cで除算した値の比(B/C)/Aが0.8である位置と、前記界面との間の距離が、0.01μm以上、かつ、前記ゼオライト膜が形成される表面近傍における前記支持体の平均細孔径の50倍以下であることを特徴とするゼオライト膜複合体の製造方法。 - 請求項1ないし5のいずれか1つに記載のゼオライト膜複合体の製造方法であって、
前記b)工程において、前記種結晶が、前記支持体の表面のうち前記ゼオライト膜複合体の製造時における略鉛直面または下向きの面に付着されることを特徴とするゼオライト膜複合体の製造方法。
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WO2016084845A1 (ja) | 2014-11-25 | 2016-06-02 | 三菱化学株式会社 | 多孔質支持体-ゼオライト膜複合体及び多孔質支持体-ゼオライト膜複合体の製造方法 |
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