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Method for preparing furoic acid and 5-hydroxymethyl furoic acid by biomasses

A technology of hydroxymethyl furfural acid and biomass, applied in the field of biomass chemistry, can solve the problems of cumbersome separation process, high separation energy consumption, unindustrialization of 5-hydroxymethyl furfural and 5-hydroxymethyl furoic acid, etc. , to achieve the effect of easy operation, easy availability of raw materials, and avoiding low target products

Active Publication Date: 2019-03-01
GUIZHOU INST OF TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

If the furfural and 5-hydroxymethylfurfural prepared in step (1) are separated from the organic solvent and then oxidized in an aqueous solution, there will be problems such as complicated separation process and high energy consumption for separation
At present, the technology of producing furfural and furoic acid by degrading agricultural wastes such as corncobs, corn stalks, rice husks, peanut shells, bagasse, and wheat straw has been industrialized. Methylfuroic acid technology is still not yet industrialized

Method used

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  • Method for preparing furoic acid and 5-hydroxymethyl furoic acid by biomasses
  • Method for preparing furoic acid and 5-hydroxymethyl furoic acid by biomasses
  • Method for preparing furoic acid and 5-hydroxymethyl furoic acid by biomasses

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Embodiment 1

[0027] (1) One-step hydrothermal oxidation of corn stalks to gluconic acid and xylonic acid

[0028] Add 2.0 g of corn stalks, 0.1 g of Au / C catalyst and 25 mL of deionized water into a 50 mL stirred reactor, and conduct hydrothermal oxidation of corn stalks at 200 °C and 0.3 MPa in air for 2 h to obtain gluconic acid and xylose Acid degradation solution, wherein the yield of gluconic acid reaches 54%, and the yield of xylonic acid reaches 61%.

[0029] (2) Preparation of 5-hydroxymethylfuroic acid and furoic acid by degradation liquid two-phase method

[0030] The degradation liquid obtained in step (1) was transferred to a 100 mL stirred reactor, and 0.2 g of sodium bisulfate, 0.4 g of zinc sulfate and 25 mL of tetrahydrofuran were added, and then the mixed liquid was hydrothermally degraded at 160 ° C for 4 h to obtain 34 % 5-Hydroxymethylfuroic acid and 40% furoic acid (relative to cellulose and hemicellulose in corn stover).

Embodiment 2～15

[0032] The reaction step of embodiment 2~15 is identical with embodiment 1, and reaction condition and reaction result are as shown in table 1 and table 2, and table 1 is the reaction condition and sugar acid yield of embodiment 1~15 steps (1), namely The yield of sugar acid in the degradation solution rich in sugar acid obtained by catalytic degradation of various biomass raw materials in a 50mL high-pressure stirred reactor; Table 2 is the degradation solution containing gluconic acid and / or xylonic acid obtained in step (1). The reaction conditions and the yields of furoic acid and 5-hydroxymethylfuroic acid were catalytically converted into furoic acid and 5-hydroxymethylfuroic acid in a 100mL stirred reactor. The yield of gluconic acid and xylonic acid in table 1 is relative to the quality of cellulose and hemicellulose in the biomass raw material; the yield of furoic acid and 5-hydroxymethyl furoic acid in table 2 is relative to raw In terms of the quality of cellulose a...

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Abstract

The invention discloses a method for preparing furoic acid and 5-hydroxymethyl furoic acid by biomasses. The method includes the steps: (1) taking oxygen-containing gas as an oxidizing agent, and converting the biomasses into degradation liquid containing gluconic acid and xylonic acid under hydrothermal reaction conditions through combined actions of a first homogeneous acid catalyst and a supported metal catalyst; (2) placing the degradation liquid containing the gluconic acid and the xylonic acid into an inert atmosphere, sequentially adding an organic solvent and a second homogeneous acidcatalyst to obtain mixed liquid, performing reaction on the mixed liquid to obtain the furoic acid and the 5-hydroxymethyl furoic acid. According to the method, a small amount of solid residue is generated in the whole reaction process, and the method avoids the problems of low target products, carbon deposition on device wall surface, pipeline blockage and the like caused by a lot of solid residue generated in traditional biomass degradation process.

Description

Technical field: [0001] The invention relates to the technical field of biomass chemistry, in particular to a method for preparing furoic acid and 5-hydroxymethylfuroic acid from biomass. Background technique: [0002] The preparation of multifunctional platform chemicals from renewable biomass resources that widely exist in nature is of great significance to the sustainable development of human society. Cellulose and hemicellulose are the main components of biomass and the most ubiquitous carbohydrates on Earth. Therefore, it is of great significance for the high-value utilization of biomass resources to efficiently convert cellulose and hemicellulose into platform chemicals, and then into liquid fuels, polymer materials and various downstream chemicals. [0003] Furoic acid and 5-hydroxymethylfuroic acid are two multifunctional biomass-based derived platform chemicals, of which furoic acid can be used to synthesize furan, tetrahydrofuran, furfuryl alcohol, methylfuran, fu...

Claims

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Application Information

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IPC IPC(8): C07D307/46C07D307/68
CPCC07D307/46C07D307/68
Inventor 石宁岑虎张玉兰唐石云吴其俊葛武杰唐安江
Owner GUIZHOU INST OF TECH
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