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A kind of one-pot method prepares the method for levulinic acid and sulfonated carbon catalyst

A technology of levulinic acid and catalysts, applied in physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of low sugar carbon utilization efficiency and resource waste , to achieve the effect of solving low sugar carbon utilization efficiency, high carbon utilization efficiency and simple process flow

Active Publication Date: 2018-06-29
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for preparing levulinic acid and sulfonated carbon catalyst in a one-pot method. During the reaction process, glucose simultaneously generates levulinic acid and sulfonated carbon catalyst, which eliminates the formation of low-value humin and solves the current sugar The problem of low carbon utilization efficiency and serious waste of resources

Method used

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  • A kind of one-pot method prepares the method for levulinic acid and sulfonated carbon catalyst
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  • A kind of one-pot method prepares the method for levulinic acid and sulfonated carbon catalyst

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Embodiment 1

[0027] The concrete steps that present embodiment utilizes glucose and p-toluenesulfonic acid to prepare levulinic acid and sulfonated carbon catalyst are as follows:

[0028] (1) Mix glucose and p-toluenesulfonic acid with equal mass and put them into the reaction tank evenly, add water, the mass ratio of the water and p-toluenesulfonic acid is 0.7:1; The temperature was raised to 170 degrees, and the temperature was kept at 170 degrees for 7 hours; after the reaction, the water was cooled to room temperature to obtain a solid-liquid mixed product;

[0029] (2) The solid-liquid mixed product obtained in step (1) is washed and separated by suction filtration to obtain a liquid phase product and a solid phase product; the liquid phase product is mainly levulinic acid and p-toluenesulfonic acid; the solid phase product is at 110 degrees and dried to constant weight to obtain a sulfonated carbon catalyst.

[0030] In this example, the influence of water content on the recovery r...

Embodiment 2

[0035] The concrete steps that present embodiment utilizes glucose and p-toluenesulfonic acid to prepare levulinic acid and sulfonated carbon catalyst are as follows:

[0036] (1) Put glucose and p-toluenesulfonic acid with equal mass into the reaction tank evenly, add water, the mass ratio of water and p-toluenesulfonic acid is 0.1:1; The temperature was raised to 170 degrees, and the temperature was kept at 170 degrees for 7 hours; after the reaction, the water was cooled to room temperature to obtain a solid-liquid mixed product;

[0037] (2) The solid-liquid mixed product obtained in step (1) is washed with water and separated by suction filtration to obtain a liquid phase product and a solid phase product; the liquid phase product is mainly levulinic acid and p-toluenesulfonic acid; the solid phase product is obtained at 110 degrees and dried to constant weight to obtain a sulfonated carbon catalyst.

[0038] In this example, the influence of water content on the recover...

Embodiment 3

[0040] The concrete steps that present embodiment utilizes glucose and p-toluenesulfonic acid to prepare levulinic acid and sulfonated carbon catalyst are as follows:

[0041] (1) Put glucose and p-toluenesulfonic acid with equal mass into the reaction tank evenly, add water, the mass ratio of water and p-toluenesulfonic acid is 0.45:1; The temperature was raised to 170 degrees, and the temperature was kept at 170 degrees for 7 hours; after the reaction, the water was cooled to room temperature to obtain a solid-liquid mixed product;

[0042](2) The solid-liquid mixed product obtained in step (1) is washed and separated by suction filtration to obtain a liquid phase product and a solid phase product; the liquid phase product is mainly levulinic acid and p-toluenesulfonic acid; the solid phase product is at 110 degrees and dried to constant weight to obtain a sulfonated carbon catalyst.

[0043] In the present embodiment, water content is to the rate of recovery of toluenesulf...

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Abstract

The present invention proposes a method for preparing levulinic acid and sulfonated carbon catalyst in a one-pot method. Glucose and p-toluenesulfonic acid with equal mass are mixed evenly into a reaction tank, water is added, the reactor is closed for reaction, and cooling is performed after the reaction. to room temperature to obtain a solid-liquid mixed product; the solid-liquid mixed product is washed with water and separated by suction filtration to obtain a liquid phase product and a solid phase product; the liquid phase product is mainly levulinic acid and p-toluenesulfonic acid; the solid phase product is sulfonated carbon catalyst. Using a one-pot method, while using glucose to generate levulinic acid, a sulfonated carbon catalyst (instead of humin) is generated, which greatly improves the carbon utilization efficiency of glucose. The process is simple, easy to operate, and high in yield.

Description

technical field [0001] The invention relates to the field of preparation methods of levulinic acid and sulfonated carbon, in particular to a method for preparing levulinic acid and sulfonated carbon catalyst in one pot. Background technique [0002] Levulinic acid is an important bio-based platform compound, considered as a bridge compound connecting biomass and petroleum-based chemicals. The preparation of levulinic acid by catalytic hydrolysis of sugar resources such as gluconic acid has become an important technology. [0003] However, monosaccharides are prone to isomerization reactions, dehydration reactions, hydrolysis reactions, condensation reactions, etc. in the solution, and the hydrolysis reaction mechanism of monosaccharides is complicated. As the hydrolysis reaction proceeds, the color of the reaction solution will gradually deepen, usually due to Sugars or their hydrolysis products contain hydroxyl groups, carboxyl groups, and aldehyde groups, which can underg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/00C07C59/185B01J31/02
CPCB01J31/0225C07C51/00C07D307/46C07C59/185
Inventor 康世民张刚徐勇军
Owner DONGGUAN UNIV OF TECH
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