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

Active Publication Date: 2020-06-09
合肥低碳研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that fossil products are used, and the reaction conditions are very harsh, and it needs to be carried out under high temperature and high pressure.
[0004] At present, the technology of using renewable carbon sources to replace fossil products to prepare maleic acid has attracted great attention at home and abroad, and has also achieved rapid development. The problem of low conversion rate of raw materials and low product yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention discloses a catalyst for preparing maleic acid by catalyzing the oxidation of furfural, and relates to the technical field of renewable energy. Based on the existing method for preparing maleic acid, fossil products are required to be used as raw materials for production, the reaction conditions are harsh, and the conversion rate of raw materials and horsepower The problem of low yield of toric acid is proposed, the catalyst is composed of potassium salt-doped carbon nitride, the invention also discloses the preparation method of the catalyst, the potassium salt, the precursor of carbon nitride, and the solvent are mixed , obtain the catalyst after drying and calcining, and the present invention also discloses the application of the catalyst in the preparation of maleic acid by catalytic oxidation of furfural. Reaction; the beneficial effect of the present invention is that: the furfural conversion rate of preparing maleic acid by the method provided by the present invention can reach more than 99%, and the yield of maleic acid can reach up to 70.40%.

Description

technical field [0001] The invention relates to the technical field of renewable energy, in particular to a catalyst for catalyzing the oxidation of furfural to prepare maleic acid, a preparation method and application thereof. Background technique [0002] As an important chemical raw material and intermediate, maleic acid is widely used in industry. The main purpose of maleic acid is to make unsaturated polyester resin, and it can also be used as a new sour agent in the food and beverage industry. Adding an appropriate amount of maleic acid can enhance the special fruit flavor and improve the taste. At present, the world needs about 1.8 million tons of it every year maleic acid. Therefore, how to efficiently prepare maleic acid, especially using renewable resources to prepare maleic acid, has attracted widespread attention from various countries. [0003] There are many ways to produce maleic acid, but the method used in industry is mainly to oxidize benzene with air at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C07C51/285C07C57/145
CPCC07C51/285B01J27/24C07C57/145B01J27/25B01J27/08B01J37/086B01J37/04C07C51/16C07C51/23B01J27/10B01J37/084C07C51/31B01J23/04
Inventor 李文志杨涛
Owner 合肥低碳研究院
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