Preparation method of AlPO-18 molecular sieve membrane

Preparation method of AlPO-18 molecular sieve membrane

  • CN 103,449,475 A
  • Filed: 05/29/2012
  • Published: 12/18/2013
  • Est. Priority Date: 05/29/2012
  • Status: Active Application
First Claim
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1. the preparation method of an AlPO-18 molecular screen membrane, is characterized in that, comprises step:

  • 1) AlPO-18 molecular sieve crystal seed is syntheticBy after aluminium source, tetraethyl ammonium hydroxide, water and phosphoric acid mixed dissolution, in 130~

    240 ℃

    of lower Hydrothermal Synthesiss 3~

    48 hours, obtain AlPO-18 molecular sieve crystal seed;

    Wherein, the mol ratio of aluminium source, phosphoric acid, tetraethyl ammonium hydroxide and water is;

    with Al 2o 3the aluminium source of meter;

    with P 2o 5the phosphoric acid of meter;

    tetraethyl ammonium hydroxide;

    H 2o=1;

    3.16;

    6.32;

    186;

    2) crystal seed appliesSelect porous ceramic pipe as carrier, AlPO-18 molecular sieve crystal seed is applied to the internal surface of porous ceramic pipe, must apply the vitrified pipe of AlPO-18 molecular sieve crystal seed;

    3) the AlPO-18 molecular screen membrane is syntheticA, by aluminium source, tetraethyl ammonium hydroxide, water and phosphoric acid, after mixed dissolution, form the molecular screen membrane synthesis mother liquid;

    Wherein, the mol ratio of aluminium source, phosphoric acid, tetraethyl ammonium hydroxide and water is;

    with Al 2o 3the aluminium source of meter;

    with P 2o 5the phosphoric acid of meter;

    tetraethyl ammonium hydroxide;

    H 2o=1;

    1~

    4;

    0.8~

    8;

    25~

    250. B, by step

         2) coating for preparing the vitrified pipe of AlPO-18 molecular sieve crystal seed be placed in reactor, add the molecular screen membrane synthesis mother liquid, 0 ℃



    100 ℃

    lower burin-in process 5 minutes~

    24 hours, then, in 150~

    230 ℃

    of hydrothermal crystallizings 2~

    48 hours, obtain AlPO-18 molecular screen membrane pipe;

    4) template is removed in roastingBy step

         3) the AlPO-18 molecular screen membrane pipe that obtains is in 350~

    550 ℃

    of lower roastings 2~

    12 hours, obtains the AlPO-18 molecular screen membrane of activation.

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