Method for preparing D-fructose through isomerization of D-glucose

A technology of glucose and isomerization, applied in the field of D-glucose isomerization reaction, can solve the problems of metal loss, difficult separation of catalysts, etc., and achieve the effect of high product yield

Inactive Publication Date: 2016-08-10
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention is a method for preparing D-fructose by isomerizing D-glucose, and its purpose is to solve the problems that the biological enzyme method existing in the prior art requires harsh reaction conditions, while the che

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0015] Add 1 g D-glucose, 0.1 g Fe / beta molecular sieve (Si / Al=33, Fe / Al=0.05), 50 mL deionized water into the autoclave, at a speed of 500 r / min, at a temperature of 130 °C After reacting for 90 min, the contents of D-glucose and D-fructose were measured by high performance liquid chromatography. The conversion rate of D-glucose was 33%, and the yield of D-fructose was 17%.

Embodiment 2

[0017] Add 1 g D-glucose, 0.1 g Fe / beta molecular sieve (Si / Al=33, Fe / Al=0.05), 50 mL deionized water into the autoclave, at a speed of 500 r / min, at a temperature of 150 °C After reacting for 90 min, the contents of D-glucose and D-fructose were measured by high performance liquid chromatography. The conversion rate of D-glucose was 55%, and the yield of D-fructose was 22%.

Embodiment 3

[0019] Add 1 g D-glucose, 0.1 g Fe / beta molecular sieve (Si / Al=33, Fe / Al=0.05), 50 mL deionized water into the autoclave, at a speed of 500 r / min, at a temperature of 110 °C After reacting for 90 min, the contents of D-glucose and D-fructose were measured by high performance liquid chromatography. The conversion rate of D-glucose was 18%, and the yield of D-fructose was 7%.

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Abstract

The invention provides a method for preparing D-fructose through isomerization of D-glucose .The method includes the following processing steps that firstly, adding D-glucose, solvent and a catalyst into a high-pressure reaction kettle to form a reaction system, wherein the mass concentration of D-glucose is 0.1-99%, and the mass ratio of the catalyst to D-glucose is 0.01-10; secondly, conducting reaction for 0.01-100 hours under the protection of inert gas at a temperature of 20-400 DEG C, and conducting separation and purification after reaction ends to prepare D-fructose .The method has the advantages that the applied catalyst is low in price, easy to obtain, free of toxin, environmentally friendly and high in product yield .

Description

technical field [0001] The invention relates to a method for preparing D-fructose by isomerizing D-glucose with a heterogeneous catalyst, belonging to the technical field of D-glucose isomerization. Background technique [0002] Fructose is a common ketohexose, which is the sweetest sugar. It can replace glucose as a sweetener, and when fructose is metabolized in the body, it will not lead to diabetes due to excessive intake. It is expected to become a new trend of human sugar consumption. Fructose is also an important raw material for the synthesis of 5-hydroxymethylfurfural and mannitol, so it is increasingly valued in the chemical industry and human life. [0003] At present, the industrialized method for producing D-fructose is as follows: starch or D-glucose is used as raw material, and biological enzymes such as D-xylose isomerase are used to catalyze the conversion into D-fructose. Enzymatic production of D-fructose has the advantages of high selectivity, but because...

Claims

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Application Information

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IPC IPC(8): C07H3/02C07H1/00B01J29/76
CPCB01J29/7615C07H1/00C07H3/02
Inventor 夏海岸肖克浩徐思泉左宋林
Owner NANJING FORESTRY UNIV
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