Cationic starch producing method

A cationic starch and production method technology, which is applied in the field of papermaking, can solve the problems of short storage time, low reaction efficiency, starch gelatinization, etc., and achieve the effects of good product quality, high reaction efficiency, and prevention of gelatinization

Active Publication Date: 2009-10-14
山东米能生物科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet process has the characteristics of uniform reaction and good product quality, but it can only prepare cationic starch with a low degree of substitution, usually DS<0.1, and the reaction efficiency (RE) is also low, generally RE is 60%-63%, etherification agent After activation, the storage time is short, the operation is complicated, and at high pH and slightly high temperature, starch, especially tapioca starch, is prone to gelatinization, resulting in large losses

Method used

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Experimental program
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Effect test

Embodiment 1

[0021] 20m 3 2 milk mixing tanks, equipped with an electric agitator and a circulation pump, add 69% cationic etherification agent with a content of 8.05% to the starch mass, and add 2.76% NaOH to the starch mass at a flow rate of 4000L / h through the circulation pipeline, with a concentration of 2.25 %NaOH solution, when the pH reaches 11.8, first add 1t of tapioca starch, then add 10kg / min of starch quality 6.3% Yuanmingfen, then add the remaining 15t of tapioca starch to control the feeding speed of 100kg / min, and control the pH at 11.6, starch suspension concentration 24.2 Baume. Then raise the temperature to 45°C and react for 8 hours, lower the temperature and neutralize the pH to 6.0 with 8% dilute hydrochloric acid, wash, dehydrate, and dry to obtain the finished product.

Embodiment 2

[0023] 20m 3 Two milk mixing tanks, equipped with an electric agitator and a circulation pump, add 69% cationic etherification agent with a content of 8.5% to the starch mass, and add 2.8% NaOH to the starch mass at a flow rate of 4000L / h through the circulation pipeline, with a concentration of 2.25 %NaOH solution, when the pH reaches 11.8, first add 1t of cornstarch, then add 5.75% of the starch quality of Yuan Mingfen at 10kg / min, then add the remaining 15t of cornstarch to control the feeding speed of 100kg / min, and control the pH at 11.5, starch suspension concentration 23 Baume. Then the temperature was raised to 48°C for 9h. Lower the temperature, neutralize the pH to 7.0 with 8% dilute hydrochloric acid, wash, dehydrate and dry to obtain the finished product.

Embodiment 3

[0025] 20m 3 Two milk mixing tanks, equipped with an electric agitator and a circulation pump, add 69% cationic etherification agent with a content of 10% of the starch mass, and add 3.0% NaOH to the starch mass at a flow rate of 4000L / h through the circulation pipeline, with a concentration of 2.25 %NaOH solution, when the pH reaches 11.8, first add 1t of cornstarch, then add 7.0% starch starch at 10kg / min, then add the remaining 15t of cornstarch to control the feeding speed of 100kg / min, and control the pH at 11.6, starch suspension concentration 24 Baume. Then the temperature was raised to 48°C for 8h. Cool down, add dilute hydrochloric acid with a concentration of 8% to neutralize the pH to 8.0, wash, dehydrate and dry to obtain the finished product.

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Abstract

The invention belongs to the field of paper making technology and in particular relates to a Cationic starch producing method. The specific steps of the process of the method include etherifying agent activation and emulsification, etherification reaction, neutralization washing, dehydration, drying and finished product obtaining. Cationic starch materials produced according to the method is safe and also simply, conveniently and practically used, and has high reaction efficiency; the starch grains are not subject to pasting; the yield rate can be as high as 99 percent, and the reaction efficiency reaches 68 percent; and the property of the finished product is stable.

Description

technical field [0001] The invention belongs to the technical field of papermaking, in particular to a cationic starch production method. Background technique [0002] Cationic starch is an important derivative of starch ether. Because it has a positive charge and can be closely combined with negatively charged fine fibers and fillers, it is widely used in the wet end of papermaking as a reinforcement, retention, and drainage aid, which can significantly improve paper quality, reduce consumption, and reduce costs. The cationic starch market has a large demand and a wide variety. According to the structure of its amino compounds, it can be divided into: tertiary amine type, quaternary ammonium type, primary amine type, secondary amine type and miscellaneous (such as imine, etc.) and other cationic starches. Ammonium cationic starch can be used and exists stably in a wide range of pH such as neutral and alkaline, so it has great commercial value. Highly substituted cationic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/08
Inventor 许折陈以国应广东
Owner 山东米能生物科技有限公司
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