A kind of method of cyclohexane oxidation
A technology of cyclohexane and hydrogen peroxide, applied in the field of cyclohexane oxidation, to achieve the effects of improving effective utilization, activity stability, and selectivity
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preparation example 1
[0033] This preparation example illustrates the preparation of the silicon-coated hollow titanium-silicon molecular sieve catalyst used in the present invention.
[0034]Under normal pressure and 30°C, firstly add ethyl silicate to organic alkali tetrapropylammonium hydroxide aqueous solution and mix, stir and hydrolyze for 8 hours to obtain a colloidal solution, then add titanium silicon molecular sieves into it and mix evenly, and titanium The mass ratio of silicon molecular sieve, organic silicon ester, organic base and water is 100:10:2:200. Finally, transfer the above slurry to a high-pressure reactor for hydrothermal treatment at 170°C and autogenous pressure for 12 hours, take it out and filter, dry and roast Catalyst A can be obtained after conventional treatment.
preparation example 2
[0036] This preparation example illustrates the preparation of the silicon-coated hollow titanium-silicon molecular sieve catalyst used in the present invention.
[0037] Under the condition of normal pressure and 60°C, first add ethyl silicate to the organic alkali tetrapropyl ammonium hydroxide aqueous solution and mix, stir and hydrolyze for 3 hours to obtain a colloidal solution, then add titanium silicon molecular sieve into it and mix evenly, and titanium The mass ratio of silicon molecular sieve, organic silicon ester, organic base and water is 100:45:8:500. Finally, transfer the above slurry to a high-pressure reactor for hydrothermal treatment at 140°C and autogenous pressure for 16 hours, take it out and filter, dry and roast Catalyst B can be obtained after conventional treatment.
preparation example 3
[0039] This preparation example illustrates the preparation of the silicon-coated hollow titanium-silicon molecular sieve catalyst used in the present invention.
[0040] Under normal pressure and 80°C, firstly add ethyl silicate to organic alkali tetrapropylammonium hydroxide aqueous solution and mix, stir and hydrolyze for 1 hour to obtain a colloidal solution, then add titanium silicon molecular sieve into it and mix evenly, and titanium The mass ratio of silicon molecular sieve, organic silicon ester, organic base and water is 100:5:1:100. Finally, transfer the above slurry to a high-pressure reactor for hydrothermal treatment at 160°C and autogenous pressure for 6 hours, take it out and filter, dry and roast Catalyst C can be obtained after conventional treatment.
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