A kind of titanium silicon molecular sieve catalyst and its preparation method and application
A technology of titanium-silicon molecular sieve and catalyst, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as difficult control and complicated operation, reduce difficulty and production cost, and have simple preparation process and high energy efficiency. The effect of low consumption
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Embodiment 1
[0029] First step mixture preparation
[0030] Mix titanium-silicon molecular sieve, carrier, auxiliary agent and water evenly to prepare the mixture, and the ratio of feeding materials is by weight, titanium-silicon molecular sieve: N:H in the auxiliary agent 2 O is 100:0.5:1000, the titanium-silicon molecular sieve is TS-1, its weight is 85% of the total weight of the catalyst, the carrier is silicon dioxide in balance weight, and the auxiliary agent is according to the weight ratio The mass concentration of 3:7 is the mixture of 25% ammoniacal liquor and 20% tetrapropyl ammonium hydroxide;
[0031] post-processing
[0032] The mixture obtained in the first step is placed in a reaction kettle and treated under its own pressure at 120°C for 24 hours, filtered and washed to obtain the post-treatment product;
[0033] The third step is to dry
[0034]The product obtained in the second step was dried at 150°C for 24 hours to obtain a titanium-silicon molecular sieve catalyst....
Embodiment 2
[0036] Except following difference, all the other are with embodiment 1:
[0037] In the first step, titanium silicate molecular sieve: N:H in auxiliary agent 2 O is 100:0.25:500, and the auxiliary agent is a mixture of 25% ammonia and 20% tetrapropylammonium hydroxide at a mass concentration of 7:3 by weight; Treat under the same conditions for 12 hours; in the third step, dry at 80°C for 48 hours to obtain a titanium-silicon molecular sieve catalyst. Elemental analysis shows that the N content in the catalyst is 0.06%.
Embodiment 3
[0039] Except following difference, all the other are with embodiment 1:
[0040] In the first step, titanium silicate molecular sieve: N:H in auxiliary agent 2 O is 100:3:5000, and the auxiliary agent is a mixture of ammonium sulfate and 20% tetraethylammonium hydroxide according to a weight ratio of 9:1; in the second step, process 3 Hours; in the third step, dry at 150°C for 48 hours to obtain a titanium-silicon molecular sieve catalyst. Elemental analysis shows that the N content in the catalyst is 0.45%.
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