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Method for producing oxidized starch

A production method and technology of oxidized starch, which is applied in the field of modified starch production, can solve the problems of large dosage and achieve the effects of reduced dosage, faster reaction speed and shorter reaction time

Inactive Publication Date: 2010-10-13
山东福洋生物科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing production method of oxidized starch generally adopts wet method, which is to add oxidant sodium hypochlorite to starch milk, and react at high temperature to form oxidized starch. By adjusting the amount of oxidant, reaction temperature and time, oxidized starch with required viscosity is produced. , the amount of sodium hypochlorite added in this method is 3.5-4%, the amount is relatively large, and the reaction time needs 4 hours

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1). Activation: Add 1500 kg of water to 1000 kg of starch to prepare starch milk, then add 50 g of copper sulfate and stir evenly;

[0014] (2). Oxidation: add 400 kilograms of content 10% sodium hypochlorite in the starch milk after activation, control the speed of adding medicine and maintain PH=9, when PH value descends, add 4% sodium hydroxide solution, adjust PH=9 9. The temperature is controlled between 32 and 35°C, and the reaction time is 3 hours and 20 minutes;

[0015] (3). Neutralization: After the oxidation reaction is finished, add hydrochloric acid to adjust the pH of starch milk to 6.8;

[0016] (4). Drying: Centrifuge and dehydrate the starch milk, then air-dry it until the water content is ≤14%, and obtain a finished product with a carboxyl content of 1.05.

Embodiment 2

[0018] (1). Activation: Add 1500 kg of water to 1000 kg of starch to prepare starch milk, then add 100 g of copper sulfate and stir evenly;

[0019] (2). Oxidation: add 400 kilograms of content 10% sodium hypochlorite in the starch milk after activation, control the speed of adding medicine and maintain PH=9, when PH value descends, add 4% sodium hydroxide solution, adjust PH=9 9. The temperature is controlled between 32 and 35°C, and the reaction time is 2 hours;

[0020] (3). Neutralization: After the oxidation reaction is finished, add hydrochloric acid to adjust the pH of the starch milk to 6.9;

[0021] (4). Drying: Centrifuge and dehydrate the starch milk, then air-dry it until the water content is ≤14%, and obtain a finished product with a carboxyl content of 1.13.

Embodiment 3

[0023] (1). Activation: Add 1500 kg of water to 1000 kg of starch to prepare starch milk, then add 100 g of copper sulfate and stir evenly;

[0024] (2). Oxidation: Add 300 kilograms of content 10% sodium hypochlorite to the starch milk after activation, control the speed of adding medicine and maintain PH=9, when the pH value descends, add 4% sodium hydroxide solution, adjust PH=9 9. The temperature is controlled between 32 and 35°C, and the reaction time is 2 hours:

[0025] (3). Neutralization: After the oxidation reaction is finished, add hydrochloric acid to adjust the pH of the starch milk to 6.9;

[0026] (4). Drying: Centrifuge and dehydrate the starch milk, then air-dry it until the water content is ≤14%, and obtain a finished product with a carboxyl content of 0.86.

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Abstract

The invention relates to a method for producing oxidized starch. The method comprises the following steps of: adding copper sulfate accounting for 0.005 to 0.02 percent of dry starch into starch milk and uniformly stirring the mixture; adding sodium hypochlorite into the mixture, controlling liquor adding speed, keeping the pH value of the mixture at 9, adding 4 percent solution of sodium hydroxide into the mixture when the pH value of the mixture falls, adjusting the pH value to be 9 and controlling a temperature to be between 32 and 35 DEG C; adding hydrochloric acid into the mixture after an oxidation reaction is performed so as to adjust the pH of the starch milk to be neutral; and centrifugally dewatering the starch milk and performing air drying on the dewatered starch milk until the water content of the starch milk is less than or equal to 14 percent. An activation process is added in the oxidized starch production method, so that the oxidation reaction speed of the starch is increased, reaction time is shortened and the using amount of the sodium hypochlorite serving as an oxidant is reduced.

Description

technical field [0001] The invention relates to the production technology of modified starch, in particular to a production method of oxidized starch. Background technique [0002] Oxidized starch is a modified starch that is widely used. In food processing, oxidized starch can be used as low-viscosity thickener; in paper industry, oxidized starch can be used as sizing agent and adhesive; in textile industry, oxidized starch can be used as sizing agent. In addition, oxidized starch can also be used as a binder in coatings, gypsum boards, hard fiberboards, and precision casting model industries. [0003] The existing production method of oxidized starch generally adopts wet method, which is to add oxidant sodium hypochlorite to starch milk, and react at high temperature to form oxidized starch. By adjusting the amount of oxidant, reaction temperature and time, oxidized starch with required viscosity is produced. , the add-on of this method sodium hypochlorite is 3.5~4%, con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/18
Inventor 赵伟
Owner 山东福洋生物科技股份有限公司
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