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Chemical preparation method of erythritol

A technology of erythritol and erythrose, which is applied in the production process field of catalytic oxidation hydrogenation preparation, can solve the problems of deep color of crystallization mother liquor, large steam consumption, long production cycle, etc., to reduce impurities and improve the quality of mother liquor , the effect of improving efficiency and production capacity

Inactive Publication Date: 2012-02-15
FUTASTE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to provide a chemical preparation method of erythritol to solve the problems of the prior art such as long production cycle, large steam consumption, low yield, deep color of crystallization mother liquor, high viscosity, easy contamination of bacteria, low production capacity, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Configure gluconate solution: accurately weigh gluconate, make a solution with a concentration of 50% with deionized water, stir evenly, add catalyst cobalt chloride hexahydrate by 0.5% of the dry matter molar mass of sodium gluconate, and adjust the pH to 6;

[0019] Catalytic oxidation of gluconate: put the gluconate solution prepared in step 1 in a super constant temperature water bath, control the reaction temperature at 20°C, add hydrogen peroxide drop by drop while stirring, and add 8 times the molar mass of sodium gluconate dry matter Hydrogen peroxide, the control reaction time is 0.5h;

[0020] Primary refining: decolorizing and ion-exchanging the erythrose liquid prepared by catalytic oxidation in step 2;

[0021] Hydrogenation: The refined erythritol solution in step 3 is subjected to hydrogenation reaction to obtain erythritol. For hydrogenation, erythrose solution with a concentration of 45% was used, the reaction temperature was 100°C, the pressure was 1...

Embodiment 2

[0027] Configure gluconate solution: accurately weigh gluconate, make a solution with a concentration of 40% with deionized water, stir evenly, add catalyst cobalt chloride hexahydrate by 7% of the dry matter molar mass of sodium gluconate, and adjust the pH to 8;

[0028] Catalytic oxidation of gluconate: put the gluconate solution prepared in step 1 in a super constant temperature water bath, control the reaction temperature to 40°C, add hydrogen peroxide drop by drop while stirring, according to 16 times the molar mass of sodium gluconate dry matter Hydrogen peroxide; control reaction time is 6h,

[0029] Primary refining: decolorizing and ion-exchanging the erythrose liquid prepared by catalytic oxidation in step 2;

[0030] Hydrogenation: The refined erythritol solution in step 3 is subjected to hydrogenation reaction to obtain erythritol. For hydrogenation, erythrose solution with a concentration of 35% is used, the reaction temperature is 80°C, the pressure is 0.7mpa,...

Embodiment 3

[0036] Configure gluconate solution: accurately weigh gluconate, make a solution with a concentration of 4% with deionized water, stir evenly, add catalyst cobalt chloride hexahydrate by 10% of the dry matter molar mass of sodium gluconate, and adjust the pH to 5;

[0037] Catalytic oxidation of gluconate: put the gluconate solution prepared in step 1 in a super constant temperature water bath, control the reaction temperature at 65°C, add hydrogen peroxide drop by drop while stirring, and add at 1 times the molar mass of sodium gluconate dry matter Hydrogen peroxide, the control reaction time is 2h;

[0038] Primary refining: decolorizing and ion-exchanging the erythrose liquid prepared by catalytic oxidation in step 2;

[0039] Hydrogenation: The refined erythritol solution in step 3 is subjected to hydrogenation reaction to obtain erythritol. The erythrose solution with a concentration of 5% is used for hydrogenation, the reaction temperature is 160°C, the pressure is 0.3...

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Abstract

The invention relates to a chemical preparation method of erythritol. In the method, the erythritol is prepared by a chemical method, oxydol and a catalyst are used to carry out catalytic oxidation on gluconate to generate erythrose, and the erythrose is hydrogenated to be reduced into the erythritol, wherein the catalyst is cobalt chloride, and the gluconate is sodium gluconate. The chemical preparation method comprises the following steps: (1) preparing a sodium gluconate solution; (2) carrying out catalytic oxidation on the sodium gluconate; (3) carrying out primary refinement; (4) hydrogenating; (5) carrying out secondary refinement; (6) evaporating; (7) crystallizing; and (8) centrifuging: separating crystallized massecuite with a centrifuge, and drying to obtain the crystallized erythritol. The invention shortens the production period, is beneficial to improving the working efficiency, reduces the energy consumption and production cost, and solves the problems that fermentation conditions are difficult to control, microbiological contamination can be possibly caused, the fermentation period is long and the like. Besides, the invention avoids the waste of the liquid material, enhances the controllability, improves the efficiency and productive capacity, reduces the impurities in the liquid material, improves the crystal yield and product quality, and greatly lowers the production cost.

Description

technical field [0001] The invention belongs to the technical field of functional sugar production, and in particular relates to a production process for preparing erythritol by catalytic oxidation and hydrogenation. Background technique [0002] In the traditional process, erythritol is prepared by fermentation, that is, the Candida Lipolytical strain is used as the fermentation strain, and after preparation on an inclined plane and seed cultivation in shake flasks, the primary seed cultivation, secondary Seed cultivation and fermenter fermentation produce erythritol, which has a long fermentation cycle, low equipment utilization, high energy consumption, harsh production conditions, easy to be infected with bacteria, and difficult to control indicators. Contents of the invention [0003] The present invention aims to provide a chemical preparation method of erythritol to solve the problems of the prior art such as long production cycle, large steam consumption, low yield...

Claims

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Application Information

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IPC IPC(8): C07C31/24C07C29/76C07C29/78
Inventor 杜瑞锋李林姜希生王成福孙鲁
Owner FUTASTE PHARM CO LTD
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