A kind of preparation method of iron-based composite catalyst with ordered mesoporous-macroporous structure
A composite catalyst, pore structure technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve large-scale industrial application obstacles, harsh process conditions, preparation Process complexity and other problems, to achieve the effect of broad industrial application prospects, low equipment requirements, and simple process methods
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[0019] A method for preparing an iron-based composite catalyst with an ordered mesoporous-macroporous structure, comprising the steps of:
[0020] Step (1), dissolving the metal iron salt and the soluble compound of the target carrier in deionized water.
[0021] In step (2), citric acid is mixed with polyethylene glycol and dissolved in deionized water; wherein, the molar ratio of metal cations to citric acid is 1:1, and the molar ratio of citric acid to polyethylene glycol is 1 to 6 :1.
[0022] In step (3), a magnetic stirrer is used to stir the solution obtained in step (1), and at the same time, the solution obtained in step (2) is added dropwise to the solution in step (1).
[0023] Step (4): Put the mixed solution obtained in step (3) into a water bath, heat the temperature of the mixed solution to 60-70° C., and vigorously stir for 20-40 minutes to make it completely mixed.
[0024] In step (5), sodium lauryl sulfate is added to the solution obtained in step (4), and...
Embodiment 1
[0030] At room temperature, 12.625 g of ferric nitrate nonahydrate and 18.388 g of aluminum nitrate nonahydrate were dissolved in an appropriate amount of deionized water, and stirred at room temperature to obtain uniformly dispersed solution 1. Dissolve 18.55 g of citric acid monohydrate and 8.829 g of polyethylene glycol 400 in an appropriate amount of deionized water, and stir at room temperature to obtain a uniformly dispersed solution 2. Solution 2 was slowly added dropwise into solution 1, and solution 1 was continuously stirred with a magnetic stirrer during the dropwise addition. Put the mixed solution in a magnetic stirring water bath, stir at 60°C for 30 minutes to obtain a uniform mixed solution, then add 0.4g of sodium dodecylsulfonate, which is 1 times the concentration of micelles, stir and dissolve, and lower the temperature of the water bath to Adjust to 80°C and continue stirring until the solution turns into a viscous product. The resulting high-viscosity pr...
Embodiment 2
[0035] At room temperature, 8.45g of ferric chloride hexahydrate, 13.166g of aluminum nitrate nonahydrate and 4.517g of magnesium nitrate hexahydrate were dissolved in an appropriate amount of deionized water, and stirred at room temperature to obtain uniformly dispersed solution 1. Dissolve 19.41 g of citric acid monohydrate and 1.432 g of polyethylene glycol 400 in an appropriate amount of deionized water, and stir at room temperature to obtain a uniformly dispersed solution 2. Solution 2 was slowly added dropwise to solution 1, and solution 1 was continuously stirred during the dropwise addition. Put the mixed solution in a magnetically stirred water bath, stir at 65°C for 20 minutes to obtain a uniform mixed solution, then add 2g of sodium dodecylsulfonate, which is 5 times the concentration of micelles, stir and dissolve, then adjust the temperature of the water bath to Stirring was continued to 85°C until the solution became a viscous product. The resulting high-viscosi...
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