Method for preparing titanium-silicon molecular sieve
A molecular sieve and organic titanium technology, which is applied in the field of inorganic chemical synthesis, can solve the problems of not distinguishing the concentration of organic base template agent, high dosage of organic base template agent, long hydrothermal crystallization time, etc., so as to shorten the hydrothermal crystallization time, The effect of reducing the production cost and shortening the hydrothermal crystallization time
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Embodiment 1
[0036] Organic silicon source and organic titanium source are TEOS and TBOT respectively
[0037] Preparation of the first step reaction mixture solution
[0038] Molar ratio of SiO in silicon source 2 : Organic base template: TiO in titanium source 2 :H 2 O: isopropanol is 1: 0.17: 0.04: 16.5: 5.0, prepare reaction mixture solution, wherein the concentration of TPAOH is 10.4%;
[0039] The third step alcohol concentration
[0040] The concentration of TPAOH in the reaction mixture sol clear liquid is 20.5%;
[0041] The fourth step hydrothermal crystallization
[0042] Static hydrothermal crystallization at 170°C for 2 days to obtain TS-1 molecular sieve, numbered SSH-1, and the solid content of the product mixture in the synthesis system was 153.8 g / l.
[0043] The XRD spectrum and IR spectrum of TS-1 molecular sieve are shown in the attached figure 1 and 2 .
Embodiment 2
[0045] Implementation process is except following difference, and all the other are all the same with embodiment 1:
[0046] Preparation of the first step reaction mixture solution
[0047] Molar ratio of SiO in silicon source 2 : Organic base template: TiO in titanium source 2 :H 2 O: isopropanol is 1: 0.17: 0.04: 16.5: 0, prepare reaction mixture solution;
[0048] The fourth step hydrothermal crystallization
[0049] TS-1 molecular sieve was obtained, coded as SSH-2, and the solid content of the product mixture in the synthesis system was 155 g / l.
[0050] XRD spectrum of TS-1 molecular sieve and figure 1 Similarly, the IR spectrum with figure 2 similar.
Embodiment 3~7
[0052] Implementation process first step, second step and third step are the same as embodiment 2;
[0053] The fourth step hydrothermal crystallization
[0054] The hydrothermal crystallization conditions are respectively: Example 3 is 150 ℃ hydrothermal crystallization for 3 days, embodiment 4, 5, 6 is 170 ℃ hydrothermal crystallization for 4 hours, 1 day, 2 days and embodiment 7 is 200 ℃ hydrothermal crystallization for 1 day to obtain TS-1 molecular sieves, respectively numbered SSH-3, SSH-4, SSH-5, SSH-6, SSH-7, and the solid content of the product mixture in the synthesis system is between 150 and 160g / l.
[0055] XRD spectrum of TS-1 molecular sieve and figure 1 Similarly, the IR spectrum with figure 2 similar.
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