Hierarchical pore silicon-aluminum composite carrier, preparation method and application thereof
A composite carrier and multi-level pore technology, which is applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of many steps, complex processes, and unfavorable industrialization promotion, etc., to reduce diffusion resistance and simple process , the effect of good hydrogenation reaction performance
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Embodiment 1
[0027] The preparation method of the hierarchical porous silicon-aluminum composite carrier of the present embodiment comprises:
[0028] Step 1. After mixing 8mol p-chloromethylstyrene, 0.2mol potassium persulfate, 0.4mol toluene, 0.8mol cetyltrimethylammonium bromide and 30mol water, stir for 30min at a stirring rate of 600r / min , to obtain a mixed solution; then, under continuous stirring conditions, 2 mol of tetraethyl orthosilicate and 15 mol of aluminum isopropoxide were added dropwise to the mixed solution, stirred and heated in a water bath at 50° C. for 12 hours, and cooled to obtain a white solid polymer;
[0029] Step 2. Put the white solid polymer described in step 1 in a muffle furnace, and calcinate at 500° C. for 5 hours to obtain a hierarchical porous silicon-aluminum composite carrier.
[0030] figure 1 The SEM image of the hierarchically porous silicon-aluminum composite carrier prepared for this example, the magnification of A in the figure is 10,000 times,...
Embodiment 2
[0032] The preparation method of the hierarchical porous silicon-aluminum composite carrier of the present embodiment comprises:
[0033] Step 1. After mixing 10mol p-chloromethylstyrene, 0.6mol potassium persulfate, 0.8mol toluene, 1mol cetyltrimethylammonium bromide and 40mol water, stir for 180min at a stirring rate of 1000r / min, Obtain a mixed solution; then add 2.5 mol of tetraethyl orthosilicate and 25 mol of aluminum isopropoxide dropwise to the mixed solution under continuous stirring conditions, stir and heat in a water bath at 90°C for 36 hours, and cool to obtain a white solid polymer;
[0034] Step 2. Put the white solid polymer described in step 1 in a muffle furnace, and calcinate at 700° C. for 5 hours to obtain a hierarchical porous silicon-aluminum composite carrier.
Embodiment 3
[0036]The preparation method of the hierarchical porous silicon-aluminum composite carrier of the present embodiment comprises:
[0037] Step 1. After mixing 9mol p-chloromethylstyrene, 0.3mol potassium persulfate, 0.6mol toluene, 0.9mol cetyltrimethylammonium bromide and 35mol water, stir for 120min at a stirring rate of 800r / min , to obtain a mixed solution; then, under continuous stirring conditions, 2.2 mol polysiloxane and 20 mol aluminum isopropoxide were added dropwise to the mixed solution, stirred and heated in a water bath at 70° C. for 24 hours, and cooled to obtain a white solid polymer;
[0038] Step 2: Put the white solid polymer described in Step 1 in a muffle furnace, and calcinate at 600° C. for 8 hours to obtain a hierarchical porous silicon-aluminum composite carrier.
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Abstract
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