Deep eutectic solvent and preparation method thereof and application thereof in process of preparing glucose by hydrolyzing celluloses

A technology of deep eutectic solvent and cellulose, applied in the direction of glucose production, application, sugar production, etc., can solve the problems of a large amount of waste acid and waste lye, harsh operating conditions, equipment corrosion, etc., and achieve high reduction selectivity, no The effect of three wastes generation and raw material environmental protection

Active Publication Date: 2018-12-07
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that, in view of the common acid-base degradation method and oxidation method in the prior art, the equipment is severely corroded, the operating conditions are relatively harsh, a large amount of waste acid and lye is produced, and there is potential harm to the environment. A deep eutectic solvent capable of hydrolyzing cellulose, and a method for preparing glucose by hydrolyzing cellulosic biomass raw materials with the deep eutectic solvent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 has the synthesis of alkenyl functional group deep eutectic solvent

[0031] Add tribenzylamine and allyl chloride in a ratio of 1:1.2 (total 38g) into a 250mL flask filled with 100ml of acetone solvent and raise the temperature to 60°C, reflux and stir for 5h under nitrogen protection. After the reaction was completed, the solvent was removed by rotary evaporation, and the snow-white crystalline solid product tribenzyl allyl ammonium chloride was obtained by vacuum drying. Then mix tribenzyl allyl ammonium chloride and p-toluenesulfonic acid monohydrate at a material ratio of 1:1.5 and add it to a 250mL flask, gradually raise the temperature at a rate of 5-5.5°C / h, and keep stirring Until 65 ° C, a colorless transparent liquid was obtained. The synthesized transparent liquid was vacuum-dried at 60° C. for 24 h to obtain the target product olefin functional group deep eutectic solvent.

Embodiment 2

[0032] Embodiment 2 has the synthesis of alkenyl functional group deep eutectic solvent

[0033] Add triethylamine and 4-chlorostyrene in a ratio of 1:1 (total 48g) into a 250mL flask containing 100ml of chloroform solvent and raise the temperature to 85°C, reflux and stir for 4h under nitrogen protection. After the reaction was completed, the solvent was removed by rotary evaporation, and the solid product triethylstyryl ammonium chloride was obtained by vacuum drying. Then, mix triethylstyryl ammonium chloride and methanesulfonic acid at a material ratio of 1:1 and add it into a 250mL flask, gradually increase the temperature at a rate of 5-5.5°C / h, and keep stirring until 85°C. A colorless transparent liquid was obtained. The synthesized transparent liquid was vacuum-dried at 60° C. for 24 h to obtain the target product, alkene-based functional group deep eutectic solvent.

Embodiment 3

[0034] Embodiment 3 has the synthesis of sulfonic acid functional group deep eutectic solvent

[0035] Trimethylamine aqueous solution (30wt%) and 1,3-propane sultone were added into a 250mL flask at a ratio of 1:1.5, and the temperature was raised to 50°C, and stirred under reflux for 3.5h under nitrogen protection. After the reaction was completed, the solvent was removed by rotary evaporation, and the white solid product trimethylammonium propyl sulfonate was obtained by vacuum drying. Then mix trimethylammonium propyl sulfonate and acetic acid at a material ratio of 1:1, add it into a 250mL flask, gradually raise the temperature at a rate of 5-5.5°C / h, and keep stirring until 60°C to obtain a colorless Transparent liquid. The synthesized transparent liquid was vacuum-dried at 60° C. for 24 h to obtain the target product sulfonic acid functional group deep eutectic solvent.

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Abstract

The invention discloses a deep eutectic solvent. A hydrogen bond donor of the deep eutectic solvent is a protonic acid; a hydrogen bond acceptor of the deep eutectic solvent is an ammonium salt containing a specific functional group; and the specific functional group is alkylene, a sulfonic acid group, a carboxyl group, an ether group, an amino group or a sulfhydryl group. The deep eutectic solvent can efficiently hydrolyze celluloses to glucose. The invention also discloses a method of preparing the glucose by using the deep eutectic solvent to hydrolyze cellulose biomasses. The method comprises the following steps of: adding the cellulose biomass and the deep eutectic solvent to a reactor, and reacting at the temperature of 80-120 DEG C for 0.5-10h to obtain the hydrolysate glucose. Themethod has the characteristics of high reduction selectivity and high yield of glucose products in the process of using the cellulose biomass to prepare the glucose, can ensure that the glucose product meets the production quality requirements, and has very good economic, environmental and social benefits.

Description

technical field [0001] The invention relates to the technical field of fiber degradation, in particular to a deep eutectic solvent, its preparation method and its application in hydrolyzing cellulose biomass to prepare glucose. Background technique [0002] With the increasing shortage of non-renewable resources such as petroleum and coal and the increasing attention and attention to environmental pollution in various countries, cellulose will surely become one of the most important industrial raw materials in the future. It will be a good development direction to produce fuel and prepare chemical products by degrading cellulose. Cellulose degradation generally includes acid degradation, alkali degradation, and oxidation. Through degradation, glycosidic bonds are broken to generate oligosaccharides or monosaccharides, and further fuel ethanol, methylglyoxal, etc. can be obtained. At present, the research on cellulose degradation is mostly focused on the acid degradation met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K1/02C13B10/14
CPCC13B10/14C13K1/02
Inventor 任红威赵子暄王帅陈子澍陈思佳张绍蒙王梓怡
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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