Method for preparing zeolite film by grinding and coating crystal seed layer

Method for preparing zeolite film by grinding and coating crystal seed layer

  • CN 1,879,952 B
  • Filed: 12/30/2005
  • Issued: 09/12/2012
  • Est. Priority Date: 12/30/2005
  • Status: Active Grant
First Claim
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1. method for preparing zeolite film by grinding and coating crystal seed layer is characterized in that:

  • 1) Na 2O;

    SiO 2;

    Al 2O 3;

    H 2O;

    the lamina membranacea agent=(2-3.5);

    (25-50);

    1;

    (800-1600);

    mol ratio preparation gel (8-17.5);

    Put into the stainless steel still that gathers the tetrafluoro lining, took out after constant temperature 45-60 under 160-180 ℃

    the temperature hour the sealing back, washing;

    Drying obtains the micron order zeolite grain;

    2) zeolite grain that synthesized is ground after, be scattered in the deionized water, be made into suspension through washing, obtain sub-micron or nanoscale zeolite crystallite after centrifugal, being scattered in again in ethanol or the acetone, at treated α

    -Al 2O 3On earthenware or stainless steel or the charcoal prop carrier, on prop carrier, coat crystal seed layer with czochralski method, after the drying, under 350-400 ℃

    , roasting was solidified in 3 hours;

    Described treated α

    -Al 2O 3Earthenware is with porous α

    -Al 2O 3With ultrasonic oscillation flush away surface and hole inner suspension particle, soaked 24 hours with the 1M sodium hydroxide solution after polishing with 600# sand paper on the ceramic monolith surface again, extremely neutral with the ultrasonic oscillation washing then, 110 ℃

    of dry for standby;

    3) with Na 2O;

    SiO 2;

    Al 2O 3;

    H 2O;

    the lamina membranacea agent=(5.3-8);

    (25-50);

    1;

    (2000-4500);

    mol ratio preparation preparation zeolite membrane gel (28.5-50);

    The carrier that scribbles crystal seed layer is put into the withstand voltage still of the stainless steel that gathers the tetrafluoro lining;

    Inject this gel with the carrier submergence, still is sealed;

    Place under 160-180 ℃

    the temperature and take out after 40-60 hour, washing, drying through heating rate is again;

    0.5-0.8 ℃

    /minute, rate of temperature fall is;

    obtain zeolite membrane after 1-1.5 ℃

    /minute the heating and cooling program roasting.

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