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Preparation method of furoic acid

A technology for furoic acid and furfural, applied in the field of preparation of furoic acid, can solve problems such as complex acid treatment, and achieve the effects of simplified post-processing steps, low cost, and good industrial application prospects

Active Publication Date: 2021-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A main purpose of the present invention is to overcome at least one defective of above-mentioned prior art, provide a kind of preparation method of furoic acid, the catalyst activity that this method adopts is high, The product yield is high, the reaction does not need to be carried out in an alkaline environment, the reaction process is environmentally friendly, and the product is easy to separate, which solves the problem of complicated subsequent acid treatment in the traditional furoic acid preparation process

Method used

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preparation example Construction

[0021] The invention provides a method for preparing furoic acid, comprising: contacting an aqueous solution of furfural with a catalyst under air and / or oxygen conditions, and performing a catalytic oxidation reaction to obtain furoic acid, wherein the catalyst is obtained by the following steps: a carrier, an alkali The neutral nitrogen-containing compound and the precursor of the active component are mixed and placed in a solvent, heated in a water bath and subjected to reflux and stirring treatment; the mixture after the reflux and stirring treatment is sequentially subjected to drying treatment and roasting reduction treatment to obtain a catalyst; wherein, the active component The precursor is selected from rhodium chloride (RhCl 3 ), palladium chloride (PdCl 2 ), chloroplatinic acid (H 2 PtCl 6 ) and ruthenium chloride (RuCl 3 ), the carrier is selected from activated carbon (AC), graphite (C), fullerene (C 60 ) and graphene oxide (GO) in one or more.

[0022] For ...

preparation example 1

[0037] The preparation of preparation example 1 catalyst Rh / AC

[0038] Mix 2g of carrier activated carbon AC, 6g of bipyridine with 120g of 25wt% ethanol and 75wt% water, add RhCl 3 , wherein the mass ratio of metal Rh to carrier activated carbon AC is 0.05:1, reflux and stir treatment in a 70°C water bath for 8h, separate the treated solid, and then dry it in an oven at 120°C for 16h, and then calculate the volume percentage in 20%H 2 and 80%N 2 The atmosphere was reduced and calcined at 650° C. for 4 hours to obtain a catalyst Rh / AC with an active component content (ie, metal element content) of 4.7 wt%.

preparation example 2

[0039] The preparation of preparation example 2 catalyst Rh / AC

[0040] Mix 2g of carrier activated carbon AC, 10g of melamine with 130g of 20wt% ethanol and 70wt% water, add RhCl 3 , wherein the mass ratio of the metal Rh to the carrier activated carbon AC is 0.06:1, reflux and stir treatment in a 60°C water bath for 10h, separate the treated solid, and then dry it in an oven at 110°C for 18h, and then by volume percentage, in 30%H 2 and 70%N 2 The atmosphere was reduced and calcined at 750° C. for 3 hours to obtain a catalyst Rh / AC with an active component content of 5.6 wt%.

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Abstract

The invention provides a preparation method of furoic acid, and the method comprises the following steps of: under the condition of air and / or oxygen, contacting an aqueous solution of furfural with a catalyst for catalytic oxidation reaction to prepare furoic acid, wherein the catalyst is obtained by the following steps of: mixing a carrier, an alkaline nitrogen-containing compound and an active component precursor and placing the mixture in a solvent, performing heating under a water bath condition and carrying out reflux stirring treatment; sequentially carrying out drying treatment and roasting reduction treatment on the mixture subjected to the reflux stirring treatment to obtain the catalyst; wherein the active component precursor is selected from one or more of rhodium chloride, palladium chloride, chloroplatinic acid and ruthenium chloride, and the carrier is selected from one or more of activated carbon, graphite, fullerene and graphene oxide. The catalyst adopted by the method is high in activity, the product yield is high, the reaction does not need to be carried out in an alkaline environment, the reaction process is environment-friendly, the product is easy to separate, and the problem of complicated subsequent acid treatment in the traditional furoic acid preparation process is solved.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of furoic acid. Background technique [0002] At present, the fuels and chemicals required by society are mainly derived from fossil fuels, and the increase in the cost of fossil fuels, the reduction in supply, and the impact on the environment have led to widespread interest in sustainable alternative energy and chemical raw materials. Material resources, the preparation of polymer materials, bulk chemicals, and the replacement of petroleum resources are of great significance. Furfural (also known as 2-furyl formaldehyde) is a common biomass-based platform compound. It is hydrolyzed under the action of acid to generate xylose, which is then prepared from xylose by cyclodehydration. It has basically realized industrialization at present. Furfural can be selectively oxidized to synthesize furoic acid. Furoic acid (also known as 2-furanoic acid) can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/68B01J23/46B01J23/44B01J23/42
CPCC07D307/68B01J23/462B01J23/464B01J23/44B01J23/42
Inventor 郑路凡孙乾辉杜泽学宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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