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Process for producing crystalline fructose by using corn starch

A technology for crystallization of fructose and corn starch, applied in the production of sugar, sugar production, fructose production, etc., can solve the problems of excessive viscosity of crystalline materials, low equipment utilization and production efficiency, long crystallization process time, etc., to achieve purity High, avoid the difficulty of evaporation and crystallization, improve the utilization rate and production efficiency

Active Publication Date: 2013-04-24
河北乐开节能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a process for producing crystalline fructose from cornstarch, so as to solve the problems in the prior art that the viscosity of the crystalline material is too high, the crystallization process takes a long time, the equipment utilization rate and production efficiency are low, and the quality of the finished product is poor. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] a. The cornstarch is processed through milk adjustment, liquefaction, saccharification with glucoamylase, vacuum drum filtration, decolorization filtration, ion exchange refining, and vacuum evaporation to obtain a glucose concentrate with a glucose purity of 96.2%.

[0034] b. The above concentrated glucose solution is crystallized by cooling and centrifuged to obtain crystalline glucose with a purity of 99.9%.

[0035]c. Dissolving the above crystallized glucose into 45% glucose solution with hot water, and passing the glucose solution into an immobilized isomerase column for isomerization reaction to obtain fructose syrup containing fructose, the control parameters in the isomerization process are: The dry matter of the feed glucose solution is 45%, the purity is greater than 99.5%, pH 7.5, the isomerization temperature is 55°C, the isomerization time is 30 minutes, the calcium ion is controlled to be less than 2mg / kg, and magnesium sulfate and magnesium ion are added...

Embodiment 2

[0041] a. The corn starch is subjected to milk adjustment, liquefaction, saccharification with glucoamylase, vacuum drum filtration, decolorization filtration, ion exchange refining, and vacuum evaporation to obtain a glucose concentrate with a glucose purity of 97.0%.

[0042] b. The above concentrated glucose solution is crystallized by cooling and centrifuged to obtain crystalline glucose with a purity of 99.9%.

[0043] c, the above-mentioned crystalline glucose is dissolved into 47% glucose solution with hot water, and the glucose solution is passed into an immobilized isomerase column for isomerization reaction to obtain fructose syrup containing fructose. The control parameters in the isomerization process are: Feed glucose solution dry matter 47%, purity greater than 99.5%, pH 7.6, isomerization temperature 57°C, isomerization time 90 minutes, control calcium ion less than 2mg / kg, add magnesium sulfate and magnesium ion during isomerization The content is greater than ...

Embodiment 3

[0049] a. The cornstarch is subjected to milk adjustment, liquefaction, saccharification with glucoamylase, vacuum drum filtration, decolorization filtration, ion exchange refining, and vacuum evaporation to obtain a glucose concentrate with a glucose purity of 96.5%.

[0050] b. The above concentrated glucose solution is crystallized by cooling and centrifuged to obtain crystalline glucose with a purity of 99.9%.

[0051] c. The above-mentioned crystalline glucose is dissolved into 49% glucose solution with hot water, and the glucose solution is passed into an immobilized isomerase column for isomerization reaction to obtain fructose syrup containing fructose. The control parameters in the isomerization process are: Feed glucose solution dry matter 49%, purity greater than 99.5%, pH 7.7, isomerization temperature 59°C, isomerization time 120 minutes, control calcium ion less than 2mg / kg, add magnesium sulfate and magnesium ion during isomerization The content is greater than ...

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Abstract

The invention discloses a process for producing crystalline fructose by using corn starch. According to the process, corn starch is adopted as a raw material, and is subjected to enzyme hydrolysis, such that a glucose solution is obtained; the glucose solution is subjected to crystallization and separation, such that crystalline glucose with purity higher than 99.9% is obtained; the crystalline glucose is subjected to an isomerization reaction, such that high fructose corn syrup containing fructose is obtained; the high fructose corn syrup is subjected to refining, evaporation concentration, and chromatographic separation, such that a fructose solution is obtained; the fructose solution is subjected to discoloration filtering and evaporation concentration, such that a fructose concentrated liquid is obtained; the fructose concentrated liquid is subjected to evaporation crystallization in a vacuum evaporation crystallization tank, and is subjected to centrifugal separation, washing, and drying, such that crystalline fructose with a water weight percentage lower than 0.08% is obtained. According to the invention, evaporation crystallization is used for replacing cooling crystallization, such that a crystallization time is reduced from 80-90h of cooling crystallization to 4-8h. Therefore, equipment utilization rate and production efficiency are greatly improved.

Description

technical field [0001] The invention relates to a sugar production process, in particular to a process for producing crystalline fructose from cornstarch. Background technique [0002] Fructose is a six-carbon ketose, which is an isomer of glucose. Its sweetness is about 1.6 times that of sucrose, and it is the sweetest monosaccharide among all natural sugars. At present, as a sweetener, fructose is not only widely used in the food industry, but also in medical treatment. Fructose has been included in the Pharmacopoeia in Europe, the United States and other countries, and has been made into injections and fructose VC tablets for use. It is used in the treatment of cardiovascular disease, diabetes, brain disease and liver disease. In addition, fructose can also be used in the treatment of drunkenness, alcohol poisoning and assisted reproduction. Crystalline fructose is a high-purity solid fructose product, which is favored for its high purity and easy packaging and transport...

Claims

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Application Information

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IPC IPC(8): C13K11/00
Inventor 赖庚音陆伟新张建中陈书菊陈斌
Owner 河北乐开节能科技股份有限公司
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