A kind of deep eutectic solvent, its preparation method and its application in hydrolyzing cellulose to prepare glucose

A low eutectic solvent, technology for dissolving cellulose, applied in the production, application, sugar production and other directions of glucose, can solve the problems of a large number of waste acid and waste lye, harsh operating conditions, environmental hazards, etc., to achieve high reduction selectivity, The effect of no three wastes and environmental protection of raw materials

Active Publication Date: 2021-12-03
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] Example 1 Synthesis of an olefin-based functional group low a molten solvent

[0031] Subinylmine and chloropropene were added to 60 ° C in a 250 ml flask of 100 ml of acetone solvent in a substance of 1: 1.2 (total). The solvent was evaporated after the reaction was completed, and the white crystalline solid product trisylcyl ammonium chloride was evaporated. Then, trisenzylcyl ammonium chloride and a hydrazine of the toluenesulfonic acid were mixed with a substance of 1: 1.5, gradually warmed in a 250 ml flask, and continued to stir up at 5 ~ 5.5 ° C / h. Until 65 ° C, colorless transparent liquid. The synthetic transparent liquid was dried in vacuo at 60 ° C for 24 h to give the target product olefin functional group low-molten solvent.

Embodiment 2

[0032] Example 2 Synthesis having an olefin-based functional group low a molten solvent

[0033] Triethylamine and 4-chloroprene were added to 85 ° C in a 250 mL flask having a 100 ml chloroform solvent in a substance of 1: 1 (total), and stirred at a nitrogen gas under nitrogen. The solvent was evaporated after the reaction was completed, and the solid product triethylstyrene based chloride was obtained in vacuo. The triethylstyrene-based chloride and methanesulfonic acid were then mixed with a substance of 1: 1, and then a 250 ml flask was added, and the speed of 5 to 5.5 ° C / h was gradually warmed, continued to stir until 85 ° C, Colorless transparent liquid. The synthetic transparent liquid was dried in vacuo at 60 ° C for 24 h to give the target product olefin base functional group low molten solvent.

Embodiment 3

[0034] Example 3 Synthesis of a sulfonic acid functional group low a molten solvent

[0035] The trimethylamine (30 wt%) and 1,3-propanesulfonate were added to 50 ° C in a 250 ml flask in a substance of 1: 1.5, and stirred at a nitrogen gas to stir. 3.5 h. The solvent was evaporated after the reaction was completed, and the trimethylpropate sulfonate is given in vacuo. Then, ammonium trimethylsulfonate and acetic acid were mixed with a substance of 1: 1, and then gradually warmed in a 250 ml flask, and the temperature was gradually warmed at a speed of 5 to 5.5 ° C / h, continued until 60 ° C, colorless color Transparent liquid. The synthetic transparent liquid was dried in vacuo at 60 ° C for 24 h to give the target product sulfonate functional group low-molten solvent.

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PUM

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Abstract

The invention discloses a deep eutectic solvent, wherein the hydrogen bond donor is a protonic acid, and the hydrogen bond acceptor is an ammonium salt containing a specific functional group, and the specific functional group is an alkene group, a sulfonic acid group, a carboxyl group, an ether group, an amino group Or mercapto, the deep eutectic solvent can efficiently hydrolyze cellulose to glucose. The invention also discloses a method for preparing glucose by using the deep eutectic solvent to hydrolyze cellulosic biomass, adding the cellulose biomass and the deep eutectic solvent into a reactor, and reacting at 80-120°C for 0.5-10 hours to obtain Hydrolyzate glucose. The method of the invention has the characteristics of high reduction selectivity and high yield of glucose products in the process of preparing glucose from cellulose biomass, can ensure that the glucose products meet production quality requirements, and has good economic, environmental and social benefits.

Description

Technical field [0001] The present invention relates to the field of fiber degradation techniques, and more particularly to a low-molten solvent, a preparation method thereof, and a use of glucose in hydrolyzed cellulose biomass. Background technique [0002] With the increasing lack of renewable resources such as oil and coal and the increasing attention and attention of environmental pollution problems, cellulose will become one of the most important industrial raw materials in the future. By degrading cellulose production fuel and preparation chemical products will be a good development direction. Cellulose degradation is generally acid-degraded, alkali decomposition, and oxidation, etc. At present, cellulose degradation studies are concentrated in acidic degradation, while conventional acidic degradation is high and cannot recover the acid solution, and the treatment of acid solution has increased the environmental load; alkali deceleration method also has acid-dependent meth...

Claims

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Application Information

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Patent Type & Authority Patents(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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