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Homogeneous tantalum catalyst for catalyzing isomerization of glucose into fructose, preparation method and application

A catalyst, glucose technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, preparation of sugar derivatives, etc. sugar instability

Active Publication Date: 2021-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the beginning of the 20th century, researchers have systematically studied the process of preparing fructose by catalytic isomerization of glucose, and developed a series of catalysts, such as liquid base catalysts, solid base catalysts, metal salt catalysts, and molecular sieves. It is unstable in a strong alkaline aqueous solution, and a series of extremely complicated side reactions will occur at the same time as the isomerization reaction. In an alkaline environment, it is difficult to obtain the ideal yield of the target product by catalyzing the isomerization reaction of monosaccharides. Therefore, a simple alkali Not a good catalyst for isomerization of monosaccharides

Method used

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  • Homogeneous tantalum catalyst for catalyzing isomerization of glucose into fructose, preparation method and application
  • Homogeneous tantalum catalyst for catalyzing isomerization of glucose into fructose, preparation method and application
  • Homogeneous tantalum catalyst for catalyzing isomerization of glucose into fructose, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Put 4.41g of tantalum oxide and 5.60g of potassium hydroxide (the molar ratio of tantalum oxide and potassium hydroxide is 1:10) into a mortar and mix and grind to obtain a mixture; pour the mixture into a rectangular flat-bottomed crucible , spread it flat, place it in a muffle furnace at 500°C and bake it for 5 hours, and then place it in the air to cool. After it is completely cooled to room temperature, dissolve it in a beaker with 200ml of distilled water to obtain a homogeneous tantalum catalyst. The concentration of potassium tantalate in the catalyst is 0.1mol / L.

[0028] 2) Weigh 2.24g of glucose, add 70ml of distilled water and dissolve it in a 100ml beaker to form a 0.2mol / L glucose solution;

[0029] 3) Use 15 thick-walled pressure-resistant bottles (volume 15ml) as the reactor, pipette 4ml of glucose solution into 15 thick-walled pressure-resistant bottles with a pipette gun, and then pipette 1ml of the catalyst solution with a liquid gun Place in 15 th...

Embodiment 2

[0032] 1) Put 4.41g of tantalum oxide and 5.60g of potassium hydroxide (the molar ratio of tantalum oxide and potassium hydroxide is 1:10) into a mortar and mix and grind to obtain a mixture; pour the mixture into a rectangular flat-bottomed crucible , spread it flat, place it in a muffle furnace at 500°C and bake it for 5 hours, and then place it in the air to cool. After it is completely cooled to room temperature, dissolve it in a beaker with 200ml of distilled water to obtain a homogeneous tantalum catalyst. The concentration of potassium tantalate in the catalyst is 0.1mol / L.

[0033] 2) Weigh 4.42g of glucose, add 70ml of distilled water and dissolve it in a 100ml beaker to form a 0.35mol / L glucose solution;

[0034] 3) Use 15 thick-walled pressure-resistant bottles (volume 15ml) as the reactor, pipette 4ml of glucose solution into 15 thick-walled pressure-resistant bottles with a pipette gun, and then pipette 1ml of the catalyst solution with a liquid gun Place in 15 t...

Embodiment 3

[0037] 1) Put 4.41g of tantalum oxide and 5.60g of potassium hydroxide (the molar ratio of tantalum oxide and potassium hydroxide is 1:10) into a mortar and mix and grind to obtain a mixture; pour the mixture into a rectangular flat-bottomed crucible , spread it flat, place it in a muffle furnace at 500°C and bake it for 5 hours, and then place it in the air to cool. After it is completely cooled to room temperature, dissolve it in a beaker with 200ml of distilled water to obtain a homogeneous tantalum catalyst. The concentration of potassium tantalate in the catalyst is 0.1mol / L.

[0038] 2) Weigh 6.3g of glucose, add 70ml of distilled water and dissolve it in a 100ml beaker to form a 0.5mol / L glucose solution;

[0039] 3) Use 15 thick-walled pressure-resistant bottles (volume 15ml) as the reactor, pipette 4ml of glucose solution into 15 thick-walled pressure-resistant bottles with a pipette gun, and then pipette 1ml of the catalyst solution with a liquid gun Place in 15 thi...

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Abstract

The invention relates to a homogeneous tantalum catalyst for catalyzing isomerization of glucose into fructose and a preparation method and application thereof. The catalyst comprises potassium tantalate. Preferably, the concentration of the potassium tantalate ranges from 0.01 mol / L to 0.15 mol / L. The preparation method of the catalyst comprises the following steps of: S1, mixing tantalum oxide and potassium hydroxide, and performing grinding to obtain a mixture; and S2, roasting the mixture, and cooling and dissolving the product in distilled water to obtain the catalyst. The homogeneous tantalum catalyst provided by the invention can effectively regulate and control conversion of glucose, and when the homogeneous tantalum catalyst is used for catalyzing isomerization of glucose into fructose, the isomerization conversion rate of glucose can reach 61.43%, and the yield of fructose is 43.29%.

Description

technical field [0001] The invention belongs to the field of monosaccharide isomerization, and specifically relates to a homogeneous tantalum catalyst for catalyzing the isomerization of glucose into fructose, a preparation method thereof and an application in catalyzing the isomerization of glucose into fructose. Background technique [0002] With the decrease of fossil energy and the increasingly prominent environmental problems, the development of renewable clean energy is an important means to solve the current energy and environmental crisis. The preparation of some key platform compounds by catalytic conversion of carbohydrate sugars has broad application prospects. These preparation processes generally include the following reaction steps: hydrolysis of cellulose or other polysaccharides in carbohydrates to generate glucose; catalytic isomerization of glucose to fructose ; Fructose-catalyzed preparation of target platform compounds. Compared with the two steps of pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20C07H3/02C07H1/00
CPCB01J23/20C07H3/02C07H1/00
Inventor 王斌姜健准商宜美
Owner CHINA PETROLEUM & CHEM CORP