Preparation method of carbon-supported multi-metal catalyst and application of carbon-supported multi-metal catalyst in N-alkylation reaction
A multi-metal catalyst and multi-metal technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, amino compound preparation, chemical instruments and methods, etc., can solve the problem of difficult industrial preparation and mass production, complicated preparation process, Serious pollution and other problems, achieve the effect of reducing the size of metal particles, improving catalytic ability, and simple steps
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[0036] The application provides a method for preparing a carbon-supported multi-metal catalyst. In this method, a carbon-nitrogen material is introduced, which can reduce the metal particle size of the catalyst, increase the metal dispersion, and then improve the catalytic ability. At the same time, the method has simple steps and is environmentally friendly. .
[0037] see figure 1 , figure 1 It is a schematic flow chart of the preparation method of the carbon-supported multi-metal catalyst in the embodiment of the present application. In this embodiment, the preparation method of the carbon-supported multimetal catalyst includes:
[0038] S110: Provide multi-metal solution and carbon-nitrogen material precursor solution.
[0039] Wherein, the multi-metal solution includes at least two kinds of transition metal ions, more specifically, it can be a metal of Group VIII, such as ruthenium, palladium, platinum, iron, cobalt, rhodium, rhenium, iridium, nickel, etc.
[0040] Ca...
Embodiment 1
[0095] Weigh 1.24g PdCl 2 Add it to 10mL deionized water, raise the temperature to 50°C, add 1.25mL concentrated hydrochloric acid, after it is completely dissolved, add 10g RuCl 3 ·xH 2 O, continue stirring until completely dissolved to obtain a bimetallic solution, denoted as solution A.
[0096] Weigh 5g of urea and add it to 20g of 50°C water. After stirring and dissolving completely, a carbon-nitrogen material precursor solution is obtained, which is designated as solution B.
[0097] Solution A was slowly added to solution B, and the temperature was raised to 60°C. After stirring for 4 hours, the stirring was stopped to obtain a coordination solution, which was designated as solution C.
[0098] Weigh 120g dry weight of activated carbon in 1000mL deionized water, stir for 1h, add solution C, raise the temperature to 43°C, stir at 400r / min, use 2% sodium carbonate aqueous solution to adjust the pH of the system to 3.0, stir for 2h , filtered with suction, and washed wi...
Embodiment 2
[0122] Weigh 2g PdCl 2 Add it to 10mL deionized water, raise the temperature to 50°C, add 2mL concentrated hydrochloric acid, after it is completely dissolved, add 5g RuCl 3 ·xH 2 O, continue stirring until completely dissolved to obtain a bimetallic solution, denoted as solution A.
[0123] Weigh 2.5g of urea and add it to 15g of 50°C water. After stirring and dissolving completely, a carbon-nitrogen material precursor solution is obtained, which is designated as solution B.
[0124] Solution A was slowly added to solution B, and the temperature was raised to 60°C. After stirring for 4 hours, the stirring was stopped to obtain a coordination solution, which was designated as solution C.
[0125] Weigh 181g of activated carbon in 1500mL of deionized water, stir for 1 hour, add solution C, raise the temperature to 47°C, stir at 400r / min, use 2% sodium carbonate aqueous solution to adjust the pH of the system to 3.0, and stir for 2 hours , filtered with suction, and washed wi...
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