Crystallization method of monohydrate glucose

A glucose and crystallization technology, applied in the field of anhydrous glucose production, can solve problems such as difficult control of crystallization temperature, difficulty in separation, waste of glucose monohydrate, etc., reduce the difficulty of purification and impurity removal, improve crystallization effect and quality, save energy and reduce cost-effective effect

Active Publication Date: 2009-03-11
XIWANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing crystallization process of glucose monohydrate generally adopts a one-time crystallization method for the evaporated and concentrated material, but the one-time crystallization method is difficult to control the crystallization temperature, and the crystallization yield is low, and pseudocrystals are likely to appear during the crystallization process. To meet the quality requirements of the product, it is difficult to separate in the lower process, so that a large amount of glucose monohydrate is wasted, reducing the yield of the entire process, and affecting the economic benefits of the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 Crystallization process when restarting production

[0015] First, in the first crystallization tank, drop into the dry glucose monohydrate that accounts for 2% of the tank volume as a seed crystal, and start feeding. The purity of the feeding sugar solution is 97.5%, the feeding Brix is ​​72.6, and the feeding temperature is 46 ° C. When After the material is filled with the crystallization tank, stop feeding, start cooling, control the cooling rate of 0.2-0.25°C / hour, uniformly cool down for 18 hours, and the temperature in the tank drops to 41.5°C; then reserve 30% of the volume of the crystallization tank after crystallization. For the seed crystal of the next crystallization, send the remaining material into the second crystallization tank and start to crystallize. The material is cooled at a rate of 0.35-0.5°C / hour for 18 hours. When the temperature of the material drops to 28°C, the cooling is stopped, and the crystallization is completed. Reserve th...

Embodiment 2

[0016] Crystallization process during embodiment 2 continuous production

[0017] In the first and second crystallization tanks, materials accounting for 30% of the tank volume are respectively reserved as seed crystals. Start feeding, the purity of the feeding sugar liquid is 98%, the feeding brix is ​​72.8, the feeding temperature is 47°C, 10% sodium metabisulfite is added in advance in the sugar liquid, and the SO in the material is recorded. 2 The content is 50ppm. When the material is full of the first crystallization tank, stop feeding and start to cool down. The cooling rate is controlled at 0.3°C / hour, and the temperature is uniformly cooled for 19 hours. The seed crystals of secondary crystallization, and the remaining materials are sent to the second crystallization tank. When the material is full of the second crystallization tank, stop feeding and start to cool down. The material cools down at a rate of 0.3-0.4°C / hour for 16 hours. Stop cooling at ℃, reserve the m...

Embodiment 3

[0018] Crystallization process during embodiment 3 continuous production

[0019] In the first and second crystallization tanks, materials accounting for 36% of the tank volume are respectively reserved as seed crystals. Start feeding, the purity of the feeding sugar liquid is 97%, the feeding hammer is 70.5, and the feeding temperature is 46°C. When the material is full of the first crystallization tank, stop feeding and start cooling, and control the cooling rate at 0.25-0.28°C / Hours, uniform cooling for 18 hours, the temperature drops to 41.0°C, reserve 33% of the volume of the crystallization tank as the seed crystal for the next crystallization, and send the rest of the material into the second crystallization tank, stop when the material is full of the second crystallization tank The feed starts to cool down, and the material cools down at a rate of 0.3-0.35°C / hour for 17 hours. When the temperature of the material drops to 28°C, the cooling is stopped, and the material...

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Abstract

The invention provides a dextrose monohydrate crystallization technique for use in the production of anhydrous glucose, in particular to a method of connecting two crystallization tanks in series to perform secondary crystallization to a concentrated liquid glucose, the temperatures in the two stages of crystallization are controlled to be between 41 and 44.5 DEG C and between 27.5 and 34 DEG C , respectively, and the cooling speeds in the two stages of crystallization are controlled to be between 0.2 and 0.3 DEG C per hour and between 0.3 and 0.5 DEG C per hour. The yield of dextrose monohydrate reaches about 55 percent by adopting the crystallization technique stage by stage, which is improved greatly compared with the one-stage crystallization process; meanwhile, the energy consumption is decreased greatly, which is only 50 to 60 percent of the energy consumption of that of a four-stage crystallization, and the purity of the dextrose monohydrate obtained reaches 99.5 percent, thereby facilitating the production of further anhydrous glucose.

Description

technical field [0001] The invention relates to the production of anhydrous glucose, in particular to the crystallization process of monohydrate glucose in the production process of anhydrous glucose. Background technique [0002] Glucose monohydrate is widely used in various fields such as medicine, food, chemical industry, etc. It has a wide range of uses and a large amount. A considerable amount of glucose monohydrate is used to produce glucose anhydrous, so the production of glucose monohydrate is very important for the entire glucose industry. [0003] The existing crystallization process of glucose monohydrate generally adopts a one-time crystallization method for the evaporated and concentrated material, but the one-time crystallization method is difficult to control the crystallization temperature, and the crystallization yield is low, and pseudocrystals are likely to appear during the crystallization process. To meet the quality requirements of the product, it is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/02C07H1/06C13K1/10
Inventor 王勇王岩刘剑侠张全刚程平王非何玉梅
Owner XIWANG GROUP
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