Epoxidation catalyzing method of linear alpha olefins and hydrogen peroxide in parallel-flow-type dripping fixed bed
A hydrogen peroxide and fixed bed technology, applied in chemical instruments and methods, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve environmental pollution, can not meet the problems of environmental protection, easy operation and high selectivity at the same time, and achieve catalyst The effect of long life, easy industrial production, and long online time
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Embodiment 1
[0049] The first part: the preparation method of HBMZ molecular sieve catalyst comprises the steps:
[0050] 1) Hydrothermal crystallization
[0051] Mix the metal source, silicon source, organic template agent, complexing agent, mineralizer, and water according to the molar ratio of 0.0067:1.0:1.5:0.02:1.35:25, and use microwave or ultrasonic heating and stirring for 4 hours. The reaction process The medium microwave or ultrasonic power is 500W, and the heating temperature is 80°C; then the reaction mixture is hydrothermally crystallized at 170°C for 84 hours, and finally purified to obtain the crystallized product; the metal source is tin tetrachloride, and the The silicon source is fumed silica, the organic template is piperidine, the complexing agent is triethanolamine, and the mineralizer is boric acid.
[0052] 2) acid treatment
[0053] The HBMZ zeolite molecular sieve raw powder obtained in step 1) and the acidic solution with a molar concentration of 3mol / L are prep...
Embodiment 2
[0063] The first part: the preparation method of HBMZ molecular sieve catalyst comprises the steps:
[0064] 1) Hydrothermal crystallization:
[0065] Mix the metal source, silicon source, organic template agent, complexing agent, mineralizer, and water according to the molar ratio of 0.0375:1.0:1.5:0.1:1.34:40, and use microwave or ultrasonic heating and stirring for 2 hours. During the reaction The microwave or ultrasonic power is 600W, and the heating temperature is 90°C; then the reaction mixture is hydrothermally crystallized at 170°C for 144 hours, and finally purified to obtain the crystallized product; the metal source is dimethyl tin dichloride, The silicon source is silica sol, the organic template is 4-hydroxypiperidine, the complexing agent is diethanolamine, and the mineralizer is potassium chloride.
[0066] 2) acid treatment
[0067] The crystallized product obtained in step 1) and the acidic solution were fully mixed and reacted for 10 hours at a temperature ...
Embodiment 3
[0077] The first part: the preparation method of HBMZ molecular sieve catalyst comprises the steps:
[0078] 1) Hydrothermal crystallization:
[0079] Mix the metal source, silicon source, organic template agent, complexing agent, mineralizer, and water according to the molar ratio of 0.0133:2.0:2.0:0.01:1.0:100, and use microwave or ultrasonic heating and stirring for 1 hour. During the reaction The microwave or ultrasonic power is 1000W, and the heating temperature is 100°C; then the reaction mixture is hydrothermally crystallized at 150°C for 96 hours, and finally purified to obtain the crystallized product; the metal source is sodium metaaluminate, and the The silicon source is silica gel, the organic template is hexamethyleneimine, the complexing agent is triethanolamine, and the mineralizer is sodium borate.
[0080] 2) acid treatment
[0081] The crystallized product obtained in step 1) was fully mixed with the acidic solution at a weight ratio of 1:30 at a temperatur...
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