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Production technique of cationic starch

A cationic starch and starch technology, applied in the field of papermaking, can solve the problems of affecting starch quality, long reaction cycle, easy gelatinization of starch, etc., and achieve the effect of material safety, good product quality and improved reaction efficiency

Active Publication Date: 2015-03-11
山东米能生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The semi-dry method has high reaction efficiency, up to 90%, and can prepare cationic starch with a degree of substitution greater than 0.06. It has the advantages of environmental protection, no pollution, and low production cost. Disadvantages such as affecting starch quality, long reaction cycle, and high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Send 2 tons of corn starch, 100 kg of sodium sulfate, and 20 kg of calcium hydroxide to the coulter mixer for mixing and activation. After activation, the pH of the starch mixture is 11. Then add a cationic etherifying agent with a content of 69% to 4% of the dry weight of starch into 350 kg of 7% sodium hydroxide solution (the dry basis of sodium hydroxide is 32% of the amount of etherifying agent) for etherification. The activation of the agent, the activation time is 6 minutes. The activated etherification agent enters the high-speed mixer through a high-pressure pump, and the activated starch mixture and the activated etherification agent are compounded, and the flow rate of the activated etherification agent is controlled, and the addition is completed within 20 minutes. The compounded starch mixture is placed in a double-helix conical mixer with a rotating speed of 15 rpm. After the compounded starch mixture is soaked for 30 minutes, the water content of the starc...

Embodiment 2

[0021] Send 2 tons of tapioca starch, 100 kg of sodium sulfate, and 20 kg of calcium hydroxide to the coulter mixer for mixing and activation. After activation, the pH value of the starch mixture is controlled at 11.5. Then add a cationic etherifying agent with a content of 69% to 4.2% of the dry weight of starch into 355 kg of 7% sodium hydroxide solution (the amount of sodium hydroxide on a dry basis is 32% of the amount of etherifying agent) for etherification. The activation of the agent, the activation time is 6 minutes. The activated etherification agent enters the high-speed mixer through a high-pressure pump, and the activated starch mixture and the activated etherification agent are compounded, and the flow rate of the activated etherification agent is controlled, and the addition is completed within 20 minutes. The compounded starch mixture is placed in a double-helix conical mixer with a rotating speed of 15 rpm. After the compounded starch mixture is soaked for 30 ...

Embodiment 3

[0023] Send 2 tons of corn starch, 100 kg of sodium sulfate, and 20 kg of calcium hydroxide to the coulter mixer for mixing and activation. After activation, the pH value of the starch mixture is controlled at 12. Then add a cationic etherifying agent with a content of 69% to 6% of the dry weight of starch into 350 kg of 11% sodium hydroxide solution (the dry basis of sodium hydroxide is 32% of the amount of etherifying agent) for etherification. The activation of the agent, the activation time is 6 minutes. The activated etherification agent enters the high-speed mixer through a high-pressure pump, and the activated starch mixture and the activated etherification agent are compounded, and the flow rate of the activated etherification agent is controlled, and the addition is completed within 20 minutes. The compounded starch mixture is placed in a double-helix conical mixer with a rotating speed of 15 rpm. After the compounded starch mixture is soaked for 30 minutes, the water...

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Abstract

The invention relates to a production technique of cationic starch. A starch activation technique and a starch compounding and impregnation technique are added, and the rest of techniques are correspondingly innovated. The production technique of cationic starch comprises the following main steps: starch activation, etherifying agent activation, starch compounding and impregnation, etherification reaction, blast cooling, neutralization, blast cooling, pulverization and the like. The production technique provided by the invention has the advantages of safe material, no gelatinization of start particles, shorter reaction time, lower energy consumption, higher reaction efficiency and higher product yield, and is simple and practical to operate; and the prepared cationic starch product has the advantages of high quality and stable properties.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a process for producing cationic starch. 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 neutral and alkaline environments, so it has great commercial value. Highly substituted cation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/08D21H17/29
Inventor 吕志红
Owner 山东米能生物科技有限公司
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