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Method for preparing ethylene glycol and 1,2-propylene glycol

A technology of propylene glycol and ethylene glycol, which is applied in the field of using cellulose to produce ethylene glycol and 1, achieves the effects of low equipment requirements, easy industrialization and high conversion rate

Active Publication Date: 2010-07-07
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are also starting from cellulose, using tungsten carbide (W 2 C) and nickel (Ni) catalyzer obtains the method for ethylene glycol, but similarly obtains the method for low-carbon (carbon number is less than six) polyhydric alcohols very few, and obtains 1, the report of 2-propanediol has not had yet

Method used

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  • Method for preparing ethylene glycol and 1,2-propylene glycol
  • Method for preparing ethylene glycol and 1,2-propylene glycol
  • Method for preparing ethylene glycol and 1,2-propylene glycol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1, hydrolyzing cellulose to produce ethylene glycol and 1,2-propanediol

[0011] 1g of microcrystalline cellulose (microcrystalline cellulose, purchased from Alfa Aesar) was placed in a 100ml reaction kettle filled with sufficient water (40ml), and 0.3g of WO was added with a loading capacity of 6%. 3 / C catalyst and 0.1 g of Ru / C catalyst with a loading of 3%, filled with H 2 , the pressure in the reactor was 80atm, heated to 240°C, and reacted for 30 minutes.

[0012] According to the following method, the conversion rate of cellulose and the productive rate of ethylene glycol and 1,2-propanediol are detected:

[0013] The mass of unreacted cellulose was weighed on a balance, and it was 0 g. The reaction product is carried out high performance liquid phase analysis and quantitative, (Shimadazu LC-20A HPLC; Separation column is: BioRad Carbonhydrate HPX-87C; Analysis condition: mobile phase is water: acetonitrile (3: 2), 65 ℃, 0.3ml / min ) result shows tha...

Embodiment 2

[0024] Embodiment 2, hydrolyzing cellulose to produce ethylene glycol and 1,2-propanediol

[0025] 1g of microcrystalline cellulose (microcrystalline cellulose, purchased from Alfa Aesar) was placed in a 100ml reaction kettle filled with sufficient water (40ml), and 3.0g of 0.5% WO was added. 3 / C catalyst and 0.1 g of Ru / C catalyst with a loading of 3%, filled with H 2 , the pressure in the reactor was 80atm, heated to 250°C, and reacted for 30 minutes.

[0026] According to the following method, the conversion rate of cellulose and the productive rate of ethylene glycol and 1,2-propanediol are detected:

[0027] The mass of unreacted cellulose was weighed on a balance, and it was 0 g. The reaction product is carried out high performance liquid phase analysis and quantitative, (Shimadazu LC-20A HPLC; Separation column is: BioRad Carbonhydrate HPX-87C; Analysis condition: mobile phase is water: acetonitrile (3: 2), 65 ℃, 0.3ml / min ) The result shows that on the high perform...

Embodiment 3

[0029] Embodiment 3, hydrolyzing cellulose to produce ethylene glycol and 1,2-propanediol

[0030] 1g of microcrystalline cellulose (microcrystalline, purchased from AlfaAesar) was placed in a 100ml reaction kettle filled with sufficient water (40ml), and 0.1g of 50% WO was added. 3 / Al 2 o 3 catalyst and 0.1 g of Ru / C catalyst with a loading of 3%, charged with H 2 , the pressure in the reactor was 80atm, heated to 250°C, and reacted for 30 minutes.

[0031] According to the following method, the conversion rate of cellulose and the productive rate of ethylene glycol and 1,2-propanediol are detected:

[0032] The mass of unreacted cellulose was weighed on a balance, and it was 0 g. The reaction product is carried out high performance liquid phase analysis and quantitative, (Shimadazu LC-20A HPLC; Separation column is: BioRad Carbonhydrate HPX-87C; Analysis condition: mobile phase is water: acetonitrile (3: 2), 65 ℃, 0.3ml / min ) The result shows that on the high performan...

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Abstract

The invention discloses a method for preparing ethylene glycol and 1,2-propylene glycol. In the method, fiber is placed into water to react under the action of a catalyst at the temperature of 200-250 DEG C to obtain the ethylene glycol and the 1,2-propylene glycol. In the method, the fiber is hydrolyzed in hot water; on one hand, the WO3 catalyst, the load WO3 catalyst and the Ru / C catalyst are led into for providing acidity for promoting the acid hydrolysis of the fiber, on the other hand, the intermediate products in the hydrolysis can be inverted into low-carbon matters, and hydrogenationis carried out, so as to obtain the ethylene glycol and the 1,2-propylene glycol. The method has simple process, quick reaction, high efficiency and less energy and is easy for industrialization; no liquid acid is added, and no waste acid is discharged, therefore, the method is environmentally friendly. The method has low requirement on equipment, can not cause the corrosion of the equipment and has small investment; moreover, the inversion rate of the fiber is 100% high, the yield of the ethylene glycol can reach 35%, and the yield of the 1,2-propylene glycol can reach 31%; therefore, the method has significant application value.

Description

technical field [0001] The invention relates to the field of cellulose production, in particular to a method for producing ethylene glycol and 1,2-propanediol from cellulose. Background technique [0002] Biomass, as a widely existing renewable resource, is considered to be a source of energy and chemicals that can replace fossil resources in the future. In biomass, cellulose accounts for the main part. Its effective conversion is an important content of biomass utilization and a key step in replacing fossil resources in the future. Cellulose is a macromolecule formed by the polymerization of glucose through glycosidic bonds. Depolymerizing it into small molecular weight platform molecules and converting them into other useful chemicals is a feasible route for cellulose conversion. [0003] Polyols are regarded as an important class of platform molecules for cellulose conversion. At present, there are not many methods for synthesizing polyols from cellulose, and this field ...

Claims

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Application Information

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IPC IPC(8): C07C31/20C07C29/136C07C29/09
CPCC07C29/132C07C29/60Y02P20/52C07C31/202C07C31/205
Inventor 刘海超刘玥罗琛
Owner PEKING UNIV
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