Mesoporous composite material and catalyst, preparation method and application thereof, and preparation method of 2,2-dimethyl-4-methyl-1,3-dioxolane
A composite material and mesoporous technology, applied in one field, can solve the problem of low conversion rate of reaction raw materials, achieve less side reactions, increase conversion rate, and high catalytic activity
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[0050] In step (1), "providing a mesoporous molecular sieve material with a one-dimensional straight-through pore structure" can be directly weighing or selecting a product of a mesoporous molecular sieve material with a one-dimensional through-through pore structure, or preparing a product with a one-dimensional through-through pore structure. Mesoporous molecular sieve material with pore structure. The preparation method of the mesoporous molecular sieve material with a one-dimensional straight-through pore structure can be implemented according to a conventional method, for example, the preparation method can include: preparing a filter cake of a mesoporous molecular sieve material with a one-dimensional pore structure according to the above method, and then The obtained filter cake is dried, and the templating agent in the product obtained after drying is removed. The conditions for removing the template agent may include: a temperature of 300-600° C. and a time of 10-80 h...
Embodiment 1
[0091] This example is used to illustrate the spherical mesoporous composite material and supported catalyst of the present invention and their preparation methods.
[0092] (1) Preparation of spherical mesoporous composites
[0093] Add 1.0g (0.0002mol) of triblock copolymer surfactant P123 and 2.76g (0.06mol) of ethanol to 28ml of acetic acid and sodium acetate buffer with a pH value of 4, and stir at 15°C until P123 is completely dissolved , then add 6g (0.053mol) trimethylpentane to the resulting solution, stir at 15°C for 8h, then add 2.13g (0.014mol) tetramethoxysilane, at 15°C, pH value is 4.5 Stirring for 20h under the conditions, then the obtained solution was transferred to a polytetrafluoroethylene-lined reactor, crystallized at 60°C for 24h, then filtered and washed 4 times with deionized water, and then suction filtered to obtain a Filter cake X1 of mesoporous molecular sieve material with straight-through channels.
[0094] Dissolve 1.0g (0.0001mol) of Pluronic...
Embodiment 2
[0110] This example is used to illustrate the spherical mesoporous composite material and supported catalyst of the present invention and their preparation methods.
[0111] The spherical mesoporous composite material and the supported catalyst were prepared according to the method of Example 1. The difference was that there was no step of spray drying in the process of preparing the supported catalyst, but only the benzenesulfonic acid was loaded on the spherical mesoporous by the method of impregnation. On the composite material, the supported catalyst Cat-2 was prepared.
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