Method for synthesizing flat SSZ-13 molecular sieve by using mixed template agent

Method for synthesizing flat SSZ-13 molecular sieve by using mixed template agent

  • CN 108,584,982 B
  • Filed: 07/03/2018
  • Issued: 04/14/2020
  • Est. Priority Date: 07/03/2018
  • Status: Active Grant
First Claim
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1. A method for synthesizing a flat SSZ-13 molecular sieve by using a mixed template agent is characterized by comprising the following steps:

  • step one, mixing tetrahydrofuran and adamantane ammonium hydroxide to serve as a mixed template agent, wherein the molar ratio of the tetrahydrofuran to the adamantane ammonium hydroxide is 0.1-1;

    dissolving sodium hydroxide in deionized water to form a sodium hydroxide solution, adding a mixed template agent into the sodium hydroxide solution, and fully stirring to obtain a mixed solution A;

    step two, adding an aluminum source and a silicon source into the mixed solution A obtained in the step one by one, stirring for 0.5-2 hours at room temperature to obtain uniform mixed gel, wherein the silicon source is SiO2Calculated by Al as the aluminum source2O3The molar ratio of the reaction raw materials in the mixed solution A is as follows;

    al (Al)2O3;

    water = 0.001-0.1, Al2O3;

    mixed template = 0.05-0.5, SiO2

    Al2O3=10~50;

    Step three, transferring the uniform gel mixture obtained in the step two to a high-pressure reaction kettle for crystallization, wherein the crystallization conditions are as follows;

    crystallizing at 150-280 ℃

    for 1-8 days; and

    cooling at room temperature, filtering and recovering the solid-phase product, washing with deionized water, drying, and roasting at 560 ℃

    in the air to obtain the SSZ-13 molecular sieve.

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