Bismuth-containing catalyst for preparation of glyceric acid through selective oxidation of glycerin and preparation method of catalyst
A technology for oxidizing glycerin and bismuth catalysts, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve problems such as high cost, energy consumption, and material consumption. Achieve the effects of reduced reactivity, high conversion rate of glycerol, and simple preparation method
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Embodiment 1
[0029] Dissolve 0.2 mol of bismuth chloride in 5 L of absolute ethanol, and stir at room temperature for 0.5 h to obtain ethanol solution of bismuth chloride. Then 3 mol of copper nitrate, 3 mol of nickel chloride and 3 mol of aluminum nitrate were dissolved in 6 L of deionized water, namely the polymetallic salt solution. Slowly add 5 L bismuth chloride ethanol solution and 6 L polymetallic salt solution into a certain amount of 12 L 2mol / L ammonium carbonate solution within 1 h, adjust the pH value to 9-11 with ammonia water, and stir and age at 60 °C 8 h, cooled, washed to neutral, filtered under reduced pressure, and vacuum-dried at 60°C for 12 h to obtain a bismuth-containing layered multi-metal hydroxide catalyst. The bismuth-containing layered multi-metal hydroxide Calcined in a heating furnace under N2 at 250 °C for 3 h, the bismuth-containing layered metal composite oxide catalyst was obtained. The catalytic effect: the conversion rate of glycerol was 34.2%, and the s...
Embodiment 2
[0031] Dissolve 1 mol of bismuth nitrate in 10 L of ethylene glycol, and stir at room temperature for 3 h to obtain a bismuth nitrate solution in ethylene glycol. Then 1.5 mol ferric nitrate and 1.5 mol cobalt nitrate were dissolved in 6 L of deionized water, that is, polymetallic salt solution. Slowly add 10 L bismuth nitrate ethylene glycol solution and 6 L polymetallic salt solution into a certain amount of 12 L 2 mol / L sodium carbonate solution within 1 h, and adjust the pH value to 9-11 with sodium hydroxide solution , stirred and aged at 30°C for 24 h, cooled, washed until neutral, filtered under reduced pressure, and vacuum-dried at 110°C for 8 h to obtain a bismuth-containing layered polymetallic hydroxide catalyst. The bismuth-containing layered polyhydroxide The metal hydroxide was calcined in a heating furnace under N2 at 450 °C for 4 h to obtain a bismuth-containing layered metal composite oxide catalyst. The catalytic effect: the conversion rate of glycerol was 67...
Embodiment 3
[0033] Dissolve 1.5 mol of bismuth chloride in 10 L of absolute ethanol and glycerin (volume ratio 1:1), and stir at room temperature for 2 h to obtain bismuth chloride ethanol-glycerol solution. Then 4.5 mol copper chloride, 4.5 mol zinc chloride and 1.5 mol manganese nitrate were dissolved in 6 L of deionized water, that is, the polymetallic salt solution. Slowly add 10 L bismuth chloride ethanol glycerol solution and 6 L polymetallic salt solution into a certain amount of 6 L 5 mol / L sodium carbonate solution within 1 h, and adjust the pH value to 9-11 with potassium hydroxide solution , stirred and aged at 45°C for 18 h, cooled, washed until neutral, filtered under reduced pressure, and vacuum-dried at 90°C for 10 h to obtain a bismuth-containing layered polymetallic hydroxide catalyst. The bismuth-containing layered polyhydroxide The metal hydroxide was calcined in a heating furnace under N2 at 600 °C for 6 h to obtain a bismuth-containing layered metal composite oxide ca...
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