Process method for separating glucose from ionic liquid

A technology of ionic liquid and process method, which is applied in the field of separating glucose and ionic liquid by anti-solvent method, and achieves the effects of reducing secondary pollution and excessive use of organic solvents, with low toxicity and low price.

Active Publication Date: 2014-02-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of separation of glucose and ionic liquid after cellulose is degraded and transformed into glucose, from the perspective of sustainable development, to solve the bottleneck problem of industrialization of cellulose degradation in ionic liquid, and to promote the degradation of cellulosic biomass process of industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example illustrates the use of acetonitrile as the antisolvent, the mass fraction of glucose in the ionic liquid is 30%, the mass ratio of the ionic liquid to acetonitrile is 1:10, and the precipitation temperature is 30°C to separate glucose from the ionic liquid [BMIM]Cl craft.

[0034] Glucose was dried at 100°C in a forced air drying oven for 24 hours, and the ionic liquid was dried at 50°C under nitrogen for 12 hours. Take a mixed solution of ionic liquid [BMIM]Cl and glucose with a glucose mass fraction of 30%, add it to a 100ml ground-mouth Erlenmeyer flask, place it in an oil bath at 90°C, and stir it magnetically until the mixture forms a transparent solution, then stop heating . After the solution was cooled to room temperature, put it in a water bath at 30°C, add anti-solvent acetonitrile, the mass ratio of [BMIM]Cl to acetonitrile was 1:10, stirred magnetically, and added a small amount of seed crystals. According to the antisolvent principle, glucose...

Embodiment 2

[0036] This example illustrates the use of ethanol as the antisolvent, the mass fraction of glucose in the ionic liquid is 30%, the mass ratio of the ionic liquid to ethanol is 1:5, and the precipitation temperature is 30°C to separate glucose from the ionic liquid [BMIM]Cl craft.

[0037] Glucose was dried at 100°C in a forced air drying oven for 24 hours, and the ionic liquid was dried at 90°C under nitrogen for 12 hours. Take a mixed solution of ionic liquid [BMIM]Cl and glucose with a glucose mass fraction of 30%, add it to a 100ml ground-mouth Erlenmeyer flask, place it in an oil bath at 90°C, and stir it magnetically until the mixture forms a transparent solution, then stop heating . After the solution was cooled to room temperature, put it in a water bath at 30°C, add anti-solvent ethanol, the mass ratio of [BMIM]Cl to ethanol was 1:5, stirred magnetically, and added a small amount of seed crystals. According to the antisolvent principle, glucose begins to precipitate...

Embodiment 3

[0039] This example illustrates the use of ethanol as an antisolvent, the mass fraction of glucose in the ionic liquid is 30%, the mass ratio of ionic liquid to ethanol is 1:15, and the precipitation temperature is 0°C to separate glucose from ionic liquid [BMIM]Cl craft.

[0040] Glucose was dried at 100°C in a forced air drying oven for 24 hours, and the ionic liquid was dried at 90°C under nitrogen for 12 hours. Take a mixed solution of ionic liquid [BMIM]Cl and glucose with a glucose mass fraction of 30%, add it to a 100ml ground-mouth Erlenmeyer flask, place it in an oil bath at 90°C, and stir it magnetically until the mixture forms a transparent solution, then stop heating . After the solution was cooled to room temperature, put it in a salt water bath at 0°C, add anti-solvent ethanol, the mass ratio of [BMIM]Cl to ethanol was 1:15, stirred magnetically, and added a small amount of seed crystals. According to the antisolvent principle, glucose begins to precipitate out...

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Abstract

The invention provides a process method for crystallizing and separating glucose from ionic liquid by an anti-solvent method to obtain a pure product. The process method for separating the glucose from the ionic liquid by the anti-solvent method comprises the following process that firstly, dissolving the glucose into the ionic liquid at a certain temperature; and then adding an anti-solvent into the homogeneous mixed solution to crystallize and separate the glucose. The solid glucose obtained by crystallization is separated out from the solvent by filtering and then the anti-solvent in the residual solution is removed in a spin steaming mode to obtain the mixed solution of the ionic liquid and a trace amount of glucose, so that the aim of repeatedly using is fulfilled.

Description

technical field [0001] The invention relates to a process for glucose and ionic liquid. Specifically, the present invention relates to a process for separating glucose and ionic liquid by an anti-solvent method. Background technique [0002] In recent years, the research on the conversion of cellulosic biomass into water-soluble sugar has attracted extensive attention of researchers at home and abroad. However, due to the existence of a large number of hydrogen bonds between cellulose macromolecules, the properties of cellulose are very stable. It is insoluble in water, non-reducible, does not hydrolyze at room temperature, and hydrolyzes very slowly at high temperature. Traditional cellulose conversion is carried out in biological enzymes or inorganic acid aqueous solution, which has many unfavorable factors, such as acid hydrolysis is highly corrosive, pollutes the environment, and the product is easy to be hydrolyzed twice under acidic conditions, and the reaction is no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13K1/04C13K1/10
Inventor 吴卫泽刘维娜
Owner BEIJING UNIV OF CHEM TECH
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