Production method of glucose

A production method and glucose technology, applied in fermentation and other directions, can solve problems such as high steam consumption, large equipment jitter, poor operation stability of liquefier, etc., and achieve the effect of saving energy and reducing production and operation costs

Inactive Publication Date: 2012-04-04
COFCO BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2. After the saccharification reaches the end point, it is necessary to use a jet liquefier to heat up the sugar solution to eliminate enzymes, which consumes a lot of steam;
[0007] 3. The temperature of starch milk after blending is generally 30-35°C. During liquefaction, the temperature is rapidly raised to 106-109°C with an injector. This process has a large temperature difference, high steam consumption, poor operation stability of the liquefier, and large equipment vibration
Therefore, the liquefaction effect is unstable

Method used

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  • Production method of glucose
  • Production method of glucose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] use figure 1 The process flow shown. Such as figure 1 As shown, 100 parts by weight of corn was crushed to obtain a crushed product with an average particle diameter of 400 microns, and the crushed product was mixed with 200 parts by weight of water at 50° C. to obtain a starch slurry. The starch slurry is fixed in the slurry tank, and an appropriate amount of calcium hydroxide is added to adjust the pH to 5.8-6.2.

[0060] At 50°C, uniformly mix the starch slurry with α-amylase in an amount of 18 enzyme activity units / g corn flour for 30 minutes to obtain a mixture, pump the mixture into the liquefaction injector, and spray it with steam at 145°C Spray contact (the weight ratio of steam to mixture is 0.06:1) was carried out in the container, and the contact time was 2 seconds, so that the temperature of the mixture after contacting with steam was 96° C., and kept for 130 minutes to obtain liquefied liquid.

[0061] Through a plate heat exchanger, the high-temperatur...

Embodiment 2

[0066] 100 parts by weight of corn were pulverized to obtain a pulverized product with an average particle diameter of 400 μm, and the pulverized product was mixed with 300 parts by weight of water at 55° C. to obtain a starch slurry. The starch slurry is constant in the slurry tank, and an appropriate amount of calcium hydroxide is added to adjust the pH to 5.8-6.0.

[0067] At 55°C, the starch slurry was uniformly mixed with α-amylase in an amount of 15 enzyme activity units / g corn flour for 30 minutes to obtain a mixture,

[0068] Add a set of heat exchange area of ​​about 200m 2 The tube-and-tube heat exchanger, the liquefied liquid (after the liquefied liquid heats up the impurity-containing glucose solution, its own temperature is still maintained at about 85°C) goes through the tube side, and the mixture goes through the shell side, and the two are heated through the tube-and-tube heat exchanger. exchange.

[0069] Use a pump to pump the heat-exchanged mixture into th...

Embodiment 3

[0075] use figure 2 The process flow shown. Such as figure 2As shown, 100 parts by weight of corn was pulverized to obtain a pulverized product with an average particle diameter of 400 μm, and the pulverized product was mixed with 250 parts by weight of water at 53° C. to obtain a starch slurry. The starch slurry is fixed in the mixing tank, and an appropriate amount of calcium hydroxide is added to adjust the pH value.

[0076] The first part of amylase with 5 enzyme activity units / g corn flour was added before the starch slurry was heat-exchanged, and uniformly mixed at 53°C for 30 minutes to obtain a mixture; the second part of amylase with 5 enzyme activity units / g corn flour Add online after the mixture is sprayed, liquefied, flashed, and cooled. Before the above starch slurry is mixed with the first part of amylase, the pH of the starch slurry is adjusted to 5.8-6.0.

[0077] Add a set of heat exchange area of ​​about 200m 2 The tube-and-tube heat exchanger, the l...

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Abstract

The invention provides a production method of glucose. The method comprises steps of: (1) mixing a starchiness raw material powder and water to obtain a starch slurry, mixing the starch slurry with amylase to obtain a mixture, injecting and liquefying the mixture to obtain a liquefied liquid; or mixing the starch slurry with part of the amylase to obtain a mixture, injecting and liquefying the mixture, adding the other part of the amylase to obtain a liquefied liquid; (2) saccharifying the liquefied liquid with existence of glucoamylase to obtain a glucose solution containing impurities; (3) heating and purifying the glucose solution containing impurities to obtain the glucose. Heat for the heating is partly from heat exchange between the liquefied liquid from step (1) and the glucose solution containing impurities to obtain the glucose. According to the above technical scheme, steam needed for heating disinfection of the liquid from saccharification can be omitted to save energy.

Description

technical field [0001] The invention relates to a method for producing glucose. Background technique [0002] Glucose (C 6 h 12 o 6 ) is an indispensable carbohydrate for human beings, the main source of heat energy required by human beings, and an important raw material for medicine, food and related industries, and now it has broken through the original boundaries and has become the main raw material for corn diversified industrial alcohol. [0003] There are three methods for producing glucose from starch: acid method, double enzyme method and acid enzyme combination method. The dual-enzyme method for producing glucose is a method in which highly specific amylase and glucoamylase are used as catalysts to finally hydrolyze starch into glucose. The preparation of glucose by double enzyme method can be roughly divided into three steps: the first step is the liquefaction process, that is, the starch is hydrolyzed and liquefied by α-amylase, and the final products are dext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/20C12P19/14C12P19/02
Inventor 李冬冬王佐柱龚帅王彪吴大利
Owner COFCO BIOTECHNOLOGY CO LTD
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