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Method for preparing sugar alcohol from monosaccharide

A monosaccharide and sugar alcohol technology, applied in the field of hydrogenation conversion of sugar compounds, can solve the problems of increased pressure in the closed system, high requirements for the production environment, and high risk of safe operation, and achieve low production energy consumption, low production difficulty, The effect of high operational safety

Active Publication Date: 2016-08-17
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1120829C discloses the preparation method of sorbitol, but above-mentioned method all adopts high-temperature, high-pressure hydrogen gas, and reaction temperature is higher, and the pressure of closed system increases during the reaction process, and a large amount of unreacted hydrogen gas remains after reaction simultaneously, has improved reaction to equipment withstand pressure Requirements, while increasing energy consumption, resulting in relatively high production costs
In addition, high-temperature and high-pressure hydrogen conditions have high requirements on the production environment, and the risk of safe operation is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Weigh 6.0 g of anhydrous glucose, add 54 mL of deionized water to the reactor, dissolve and prepare to obtain a glucose solution with a mass fraction of 10%;

[0017] (2) Weigh 1.2 g of palladium-carbon (Pd / C) catalyst (Shanghai Jingchun Reagent Co., Ltd., article number P116794), and 7.2 g of sodium formate, and place them in the glucose solution prepared above;

[0018] (3) Close the reaction kettle, purge the air in the kettle with nitrogen, and circulate and replace it for 3 times, then fill it with a small amount of nitrogen as a protective gas, and react for 3.5 hours at a reaction temperature of 90°C and a rotation speed of 600rpm;

[0019] (4) After the reaction, the reaction kettle is placed in ice water to cool down, and then the gas generated by the decomposition of sodium formate in the kettle is released, and the solid metal catalyst is separated by filtration, and the reaction solution is filtered through a 0.22 micron filter membrane;

[0020] (5) The...

Embodiment 2

[0030] (1) Weigh 4.0 g of anhydrous glucose, add 46 mL of deionized water to the reactor, dissolve and prepare to obtain a glucose solution with a mass fraction of 8%;

[0031] (2) Weigh 1.0 g of Pd-Pt / C catalyst (refer to the catalyst preparation method: ChemSusChem, 2010, 3:1379–1382), and 6.0 g of potassium formate, and place them in the above prepared glucose solution;

[0032] (3) Close the reaction kettle, purge the air in the kettle with nitrogen, and circulate and replace it 3 times, then fill it with a small amount of nitrogen as a protective gas, and react for 3.5 hours at a reaction temperature of 95°C and a rotation speed of 600rpm;

[0033] (4) After the reaction, the reaction kettle is placed in ice water to cool down, and then the gas generated by the decomposition of potassium formate in the kettle is released, and the solid metal catalyst is separated by filtration, and the reaction solution is filtered through a 0.22 micron filter membrane;

[0034] (5) The f...

Embodiment 3

[0037] (1) Weigh 2.5g of fructose-free sugar, add 47.5mL of deionized water into the reaction kettle, dissolve and prepare to obtain a fructose solution with a mass fraction of 5%;

[0038] (2) Weigh 0.75 g of palladium-carbon (Pd / C) catalyst (Shanghai Jingchun Reagent Co., Ltd., article number P116794), and 3.5 g of sodium formate, and place them in the fructose solution prepared above;

[0039] (3) Close the reaction kettle, purge the air in the kettle with nitrogen, and circulate and replace it 3 times, then fill it with a small amount of nitrogen as a protective gas, and react for 3.5 hours at a reaction temperature of 95°C and a rotation speed of 600rpm;

[0040] (4) After the reaction, the reaction kettle is placed in ice water to cool down, and then the gas generated by the decomposition of sodium formate in the kettle is released, and the solid metal catalyst is separated by filtration, and the reaction solution is filtered through a 0.22 micron filter membrane;

[004...

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Abstract

The invention discloses a method for preparing sugar alcohol from monosaccharide. The method comprises the following steps: mixing the monosaccharide with deionized water, adding the obtained mixture to a reaction kettle, and stirring the mixture under normal pressure and nitrogen atmosphere conditions under the action of a metal catalyst and a hydrogen donor to carry out a transfer hydrogenation reaction in order to obtain corresponding sugar alcohol. The hydrogen donor is used as a hydrogen source to replace hydrogen, the initial reaction pressure decreases to normal pressure from 3.0-12.0MPa, the reaction temperature decreases to 85-95DEG C from 120-150DEG C, the mass yield of the sugar alcohol in the final product under mild reaction conditions can reach 70% or above, and the used hydrogen donor is acidified by formic acid to realize reutilization, so the method is green and environmentally-friendly. The method has the advantages of simple process, mild reaction conditions, low energy consumption in the production process, low production difficulty, high operating safety, high greenness, high safety, low cost, and promotion facilitation.

Description

Technical field: [0001] The invention relates to the field of hydrogenation conversion of sugar compounds, in particular to a method for preparing sugar alcohols from monosaccharides. Background technique: [0002] As a common polyol chemical, sugar alcohol compounds have been widely used in food, medicine, cosmetics, energy and chemical industries. The traditional preparation method of sugar alcohol is to catalyze the reduction of carbon-oxygen double bonds in the structure of five-carbon and six-carbon sugar compounds under high temperature and high pressure hydrogen conditions with metal catalysts to produce saturated alcoholic hydroxyl groups. CN101591222B discloses a method for preparing sorbitol by hydrogenating glucose. CN1120829C discloses the preparation method of sorbitol, but above-mentioned method all adopts high-temperature, high-pressure hydrogen gas, and reaction temperature is higher, and the pressure of closed system increases during the reaction process, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/18C07C31/26C07C29/14
CPCC07C29/14C07C31/18C07C31/26
Inventor 张军陈金铸
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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