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Method for separating and purifying biomass-based furan compound

A technology for separation and purification of compounds, which is applied in the field of separation and purification of biomass-based furan compounds, can solve the problems of poor thermal stability and high boiling point of biomass-based furan compounds, achieve reduced solvent usage, lower energy consumption, and strong applicability Effect

Active Publication Date: 2017-08-04
GUANGXI ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In the process of preparing biomass-based furan compounds by catalytic degradation of sugar compounds, there are many side reactions in the reaction, and the biomass-based furan compounds have a high boiling point and poor thermal stability, so they cannot be separated and purified by conventional rectification methods Problem, the present invention can effectively convert biomass-based furans through the reversible Schiff base reaction between polymers with active amino groups and biomass-based furan compounds, and the characteristics of precipitation-solution conversion of polymers between different pH values. Purification of furan compounds

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  • Method for separating and purifying biomass-based furan compound

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Embodiment 1

[0027] A method for separating and purifying biomass-based furan compounds, comprising the following steps:

[0028] (1) In parts by weight, 100 parts of fructose are dehydrated and decomposed without separation and purification of the mixed solution, wherein the mixed solution contains 5wt% of 5-hydroxymethylfurfural and 3.6wt% of 2,5-furandicarbaldehyde , then the mixed solution and 25 parts of chitosan acetic acid solutions with a concentration of 2wt% are placed in a reaction vessel, wherein the chitosan has a weight average molecular weight of 500KDa, and is stirred evenly at a speed of 200r / min to obtain solution A;

[0029] (2) Regulate the pH value of solution A to 10 with a concentration of 2% sodium hydroxide solution, continue to stir at a speed of 200r / min, heat up to 70°C, react for 30min to stop the reaction, naturally cool to 30°C, and suction filter, collect solid matter;

[0030] (3) After putting the solid matter into the dialysis bag, put it into a dilute a...

Embodiment 2

[0033] A method for separating and purifying biomass-based furan compounds, comprising the following steps:

[0034] (1) In parts by weight, 100 parts of sucrose are dehydrated and decomposed without separation and purification of the mixed solution, wherein the mixed solution contains 1.5wt% of 5-hydroxymethylfurfural, 0.5wt% of 2,5-furan formaldehyde, then the mixed solution and 20 parts of concentration of chitosan acetic acid solution of 2wt% are placed in the reaction vessel, wherein the weight average molecular weight of chitosan is 450KDa, stirred evenly at a speed of 200r / min, to obtain solution A;

[0035] (2) Adjust the pH value of solution A to 10 with a concentration of 2% sodium hydroxide solution, continue to stir at a speed of 200r / min, heat up to 75°C, react for 40min to stop the reaction, naturally cool to 30°C, and suction filter, collect solid matter;

[0036] (3) After putting the solid matter into a dialysis bag, put it into a dilute acetic acid aqueous s...

Embodiment 3

[0039] A method for separating and purifying biomass-based furan compounds, comprising the following steps:

[0040](1) In parts by weight, 100 parts of glucose dehydration decomposes the mixed solution without separation and purification, wherein the mixed solution contains 2wt% of 5-hydroxymethylfurfural and 0.8wt% of 2,5-furan Diformaldehyde, then the mixed solution and 40 parts of concentration of 2wt% chitosan acetic acid solution are placed in the reaction vessel, wherein the weight average molecular weight of chitosan is 800KDa, stirred evenly at a speed of 200r / min, to obtain solution A;

[0041] (2) Regulate the pH value of solution A to 12 with a 2% sodium hydroxide solution, continue stirring at a speed of 200 r / min, heat up to 60° C., react for 20 minutes to stop the reaction, naturally cool to 30° C., and suction filter. collect solid matter;

[0042] (3) After putting the solid matter into the dialysis bag, put it into a dilute hydrochloric acid aqueous solution...

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Abstract

The invention discloses a method for separating and purifying a biomass-based furan compound. Aiming at the problems that reaction has multiple side reactions, and the biomass-based furan compound is relatively high in boiling point and poor in heat stability and cannot be separated and purified through a conventional rectification method in a process of preparing the biomass-based furan compound through catalytic degradation of carbohydrate, through the characteristic that reversible schiff base reaction is generated on a macromolecule with active amino and the biomass-based furan compound, and precipitation-solution conversion is generated on the macromolecule between different pH values, the biomass-based furan compound can be effectively purified. The method is high in efficiency, low in cost and high in applicability and has industrialization promotion potential.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of industrial chemicals, in particular to a method for separating and purifying biomass-based furan compounds. [0003] 【Background technique】 [0004] At present, platform compounds are mainly obtained from petroleum resources. With the massive consumption of non-renewable resources such as petroleum, the cost of the petroleum-led chemical industry will continue to increase. Biomass is a sustainable resource with huge quantity, low price and biodegradable. Excavating renewable biomass resources to prepare new platform compounds is an important method to solve the current resource and energy crisis. As early as 2005 to 2008, the top international magazines Science and Nature continuously reported several pioneering works on the preparation of liquid fuels from biomass-based carbohydrates, which attracted people's attention. It is dehydrated to produce 5-hydroxymethylfurfural (HMF), which is then further refi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/46
CPCC07D307/46
Inventor 黎演明杜奇石龙思宇唐培朵黄华林
Owner GUANGXI ACAD OF SCI
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