Catalyst for preparing maleic acid by catalytic oxidation of furfural and its preparation method and application
A technology for catalytic oxidation and maleic acid, which is used in the preparation of carboxylic acid by oxidation, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, etc., which can solve harsh reaction conditions, raw material conversion rate and product yield. Low problems, to achieve the effect of less side reactions, lower initial investment costs, and beneficial to sustainable development
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Embodiment 1
[0027] The preparation of the catalyst that the carbon nitride of potassium bromide doping constitutes comprises the following steps:
[0028] (1) Get 10g urea and 0.5g potassium bromide, add 30g aqueous solution, stir at room temperature;
[0029] (2) After drying the stirred solution in step (1) at 80° C., grind it into powder, and put it into a crucible with a lid;
[0030] (3) Put the powder in step (2) in a muffle furnace and calcinate at 550° C. for 2 hours to obtain a potassium bromide-doped carbon nitride catalyst.
[0031] Characterization of the potassium bromide-doped carbon nitride prepared in this example shows that the surface basicity of the potassium bromide-doped carbon nitride is 1.61 mmol / g.
Embodiment 2
[0033] The preparation of the catalyst formed by the carbon nitride doped with potassium chloride comprises the following steps:
[0034] (1) Get 10g urea and 0.5g potassium chloride, add 30g aqueous solution, stir at room temperature;
[0035] (2) After drying the stirred solution in step (1) at 80° C., grind it into powder, and put it into a crucible with a lid;
[0036] (3) Put the powder in step (2) in a muffle furnace and calcinate at 550° C. for 2 hours to obtain a potassium bromide-doped carbon nitride catalyst.
Embodiment 3
[0038] The preparation of the catalyst formed by the carbon nitride doped with potassium nitrate comprises the following steps:
[0039] (1) Get 10g urea and 0.5g potassium nitrate, add 30g aqueous solution, stir at room temperature;
[0040] (2) After drying the stirred solution in step (1) at 80° C., grind it into powder, and put it into a crucible with a lid;
[0041] (3) Put the powder in step (2) in a muffle furnace and calcinate at 550° C. for 2 hours to obtain a potassium bromide-doped carbon nitride catalyst.
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