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Method for reducing molecular weight of starch through dry method

A technology of molecular weight and starch, which is applied in the field of dry method to reduce the molecular weight of starch, can solve the problems of large production water consumption, high drying energy consumption, environmental pollution, etc., and achieve the effect of no need for washing, no reagent residue, and simple operation process

Active Publication Date: 2016-04-20
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional production method of oxidized starch is mainly a wet process, which has disadvantages such as large production water consumption, complicated process, high drying energy consumption, and serious environmental pollution.

Method used

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  • Method for reducing molecular weight of starch through dry method
  • Method for reducing molecular weight of starch through dry method
  • Method for reducing molecular weight of starch through dry method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The invention provides a kind of preparation method that dry method reduces the molecular weight of glutinous rice starch, and concrete process step of the present invention is as follows:

[0045] 1. Raw material selection: glutinous rice starch with a purity of more than 90% and a moisture content of less than 14%;

[0046] 2. Oxidation process: Add 20kg of glutinous rice starch to the oxidation reaction kettle, with the ozone concentration at 10mg / L, press 5m 3Ozone is input from the inner wall of the reactor to the bottom at a speed of 10r / min, and the ozone is fully contacted with the glutinous rice starch by stirring at a speed of 10r / min, so that the ozone and the glutinous rice starch are fully contacted to ensure the uniformity of the oxidation reaction. The reaction process lasted for 1 hour respectively, and the reaction temperature was kept at 30° C. through the jacket of the reaction tank;

[0047] 3. Sample collection: The glutinous rice starch after ozon...

Embodiment 2

[0050] The invention provides a kind of preparation method that dry method reduces the molecular weight of glutinous rice starch, and concrete process step of the present invention is as follows:

[0051] 1. Raw material selection: glutinous rice starch with a purity of more than 90% and a moisture content of less than 14%.

[0052] 2. Oxidation process: Add 20kg of glutinous rice starch to the oxidation reaction kettle, with the ozone concentration at 10mg / L, press 5m 3 Ozone is input from the inner wall of the reactor to the bottom at a speed of 10r / min, and the ozone is fully contacted with the glutinous rice starch by stirring at a speed of 10r / min, so that the ozone and the glutinous rice starch are fully contacted to ensure the uniformity of the oxidation reaction. The reaction process lasted for 2 hours respectively, and the reaction temperature was kept at 30° C. through the jacket of the reaction tank.

[0053] 3. Sample collection: The glutinous rice starch after oz...

Embodiment 3

[0056] The invention provides a kind of preparation method that dry method reduces the molecular weight of glutinous rice starch, and concrete process step of the present invention is as follows:

[0057] 1. Raw material selection: glutinous rice starch with a purity of more than 90% and a moisture content of less than 14%.

[0058] 2. Oxidation process: Add 20kg of glutinous rice starch to the oxidation reaction kettle, with the ozone concentration at 10mg / L, press 5m 3 Ozone is input from the inner wall of the reactor to the bottom at a speed of 10r / min, and the ozone is fully contacted with the glutinous rice starch by stirring at a speed of 10r / min, so that the ozone and the glutinous rice starch are fully contacted to ensure the uniformity of the oxidation reaction. The reaction process lasted for 4 hours respectively, and the reaction temperature was kept at 30° C. through the jacket of the reaction tank.

[0059] 3. Sample collection: The glutinous rice starch after oz...

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Abstract

The invention discloses a method for reducing the molecular weight of starch through a dry method. The method comprises the steps of firstly, feeding the starch into a reaction still, and inputting ozone into the reaction still to react with the starch; then, separating the starch which is subjected to dry treatment by using the ozone by feeding the starch into a cyclone dust remover, thus obtaining the starch of which the molecular weight is reduced. According to the method disclosed by the invention, high-quality modified starch which is higher in carboxyl group content, low in molecular weight and lower in characteristic viscosity value can be prepared; meanwhile, the whole reaction process of the method is kept in a dry treatment process, a product is green and healthy, no reagent residue exists, and the safety of the modified starch is ensured, so that the method can be widely applied to various modern industries such as papermaking, spinning and particularly food and medicine; meanwhile, an operation technology of the method is simple in operation, no sewage and wastewater are discharged, washing is not needed, and the productivity is up to 99 percent or more, so that the operation technology can replace a traditional wet technology to prepare LMW (Low Molecular Weight) oxidized starch, and an actual application significance is obtained.

Description

technical field [0001] The application relates to the technical field of food processing, in particular to a method for reducing the molecular weight of starch by dry method. Background technique [0002] Oxidized starch is one of the most widely used modified starches. It is widely used in many modern industries such as papermaking, textiles, food, and medicine because of its low viscosity, high thermal stability, high transparency, and good film-forming properties. [0003] However, the traditional production method of oxidized starch is mainly a wet process, which has disadvantages such as large production water consumption, complicated process, high drying energy consumption, and serious environmental pollution. Contents of the invention [0004] For the problems referred to above, the present invention provides a kind of dry method to reduce starch molecular weight method, described method comprises: [0005] Sending the starch into the reactor, wherein the moisture ...

Claims

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Application Information

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IPC IPC(8): C08B31/18
CPCC08B31/18
Inventor 丁文平庄坤王月慧
Owner WUHAN POLYTECHNIC UNIVERSITY
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