Preparation method and use of Cu-SSZ-13 molecular sieve based catalyst
A cu-ssz-13, molecular sieve technology, applied in molecular sieve catalysts, separation methods, chemical instruments and methods, etc., can solve the problems of inability to effectively control the content of active components, consumption of large purified water, high cost, and achieve excellent catalytic activity. , The effect of strong controllability and high crystallinity
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[0026] Example 1 Preparation of Cu-SSZ-13 catalyst with benzyl quaternary ammonium ion as template
[0027] Copper sulfate was added to deionized water and stirred at room temperature for 30 minutes, and then tetraethylenepentamine of the same mass as copper sulfate and a certain amount of organic template were added to it, and stirring was continued for 3 hours to form a copperamine complex solution. The sodium metaaluminate, sodium hydroxide and deionized water were mixed and stirred for 1 hour, and then mixed with the copper amine complex solution, and stirring was continued for 4 hours. Finally, silica sol is added to the mixed solution, mixed and stirred for 4 hours to obtain an initial gel. The system Na 2 O, Al 2 O 3 , SiO 2 , H 2 O. The molar quantities of copper sulfate-tetraethylenepentamine and organic template are shown in Table 1.
[0028] Place the fully stirred gel in a hydrothermal reaction kettle and react at 180°C for 6 days. After the reaction is complete, cool ...
Example Embodiment
[0033] Example 2 Preparation of Cu-SSZ-13 catalyst with N, N, N-trimethyl-1-adamantamine cation as template
[0034] The feeding sequence and stirring time, hydrothermal reaction conditions and post-treatment process of gel preparation are all as in Example 1. The system is Na 2 O, Al 2 O 3 , SiO 2 , H 2 O. The molar quantities of copper sulfate-tetraethylenepentamine and template agent are shown in Table 2.
[0035] The Cu-SSZ-13 molecular sieve catalysts obtained in the five sets of experiments in Example 2 were tested by ICP and XRF respectively, and the loading amounts of the active components measured were 2.64wt.%, 3.91wt.%, 5.98wt.%, 7.05wt.%, 10.13wt.%. It shows that using this template, a catalyst with a lower Cu content can still be obtained without any post-treatment, and the Cu content and the silicon-to-aluminum ratio of the catalyst can be adjusted within a certain range.
[0036] Table 2
[0037]
[0038]
Example Embodiment
[0039] Example 3 Preparation of Cu-SSZ-13 catalyst with choline chloride as template
[0040] The feeding sequence and stirring time, hydrothermal reaction conditions and post-treatment process of gel preparation are all as in Example 1. The system is Na 2 O, Al 2 O 3 , SiO 2 , H 2 O. The molar quantities of copper sulfate-tetraethylenepentamine and organic template are shown in Table 3.
[0041] The Cu-SSZ-13 molecular sieve catalyst obtained from the five experiments of Example 3 was tested by ICP and XRF respectively, and the loading amount of the active components was 2.85wt.%, 2.91wt.%, 2.98wt.%, 3.05 wt.%, 3.13wt.%, and the ratio of silicon to aluminum is 15.8, 16.2, 16.8, 17.2, 17.9. It shows that using the template, a catalyst with lower Cu content can be obtained without post-treatment, and the Cu content and the silicon-to-aluminum ratio of the catalyst can be adjusted within a certain range.
[0042] table 3
[0043]
[0044] Figure 5~6 It is the catalytic performance gr...
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