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A kind of cationic starch solution preparation method, equipment and paper

A technology of cationic starch and cationic etherification agent, which is applied in the field of papermaking, can solve the problems of low degree of substitution of cationic starch and low paper strength, and achieve the effect of increasing the degree of substitution and increasing the strength

Active Publication Date: 2016-06-29
GOLD EAST PAPER JIANGSU
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The cationic starch solution prepared by the traditional process uses water as the solvent, disperses the starch in a large amount of water or forms a paste, and then adds an etherifying agent and alkali for etherification reaction; the cationic starch prepared by the traditional process has a low degree of substitution, and the strength of the prepared paper not tall

Method used

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  • A kind of cationic starch solution preparation method, equipment and paper
  • A kind of cationic starch solution preparation method, equipment and paper
  • A kind of cationic starch solution preparation method, equipment and paper

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preparation example Construction

[0038] refer to figure 1 , the embodiment of the present invention provides a kind of cationic starch solution preparation method, comprising:

[0039] Step 101: providing native starch solution;

[0040] The original starch can be made into an aqueous solution with a certain concentration.

[0041] Specifically, the original starch solution can be added to 35-60 degrees Celsius water to dissolve the original starch solution to a concentration of 30%-40% by mass. During the addition of the original starch, the temperature of the solvent water is always kept at 35 ~60 degrees Celsius, such as 35 degrees Celsius, 40 degrees Celsius or 60 degrees Celsius, etc., the mass percent concentration of the obtained native starch solution can be 30%, 35% or 40%, etc., and the original starch is tapioca starch, cornstarch or potato starch.

[0042] Step 102: mixing the cationic etherification agent and the basic catalyst under the first predetermined condition to obtain a first mixed liq...

Embodiment approach 1

[0070] Add a certain amount of water to the reaction tank, and then add 4 tons of tapioca raw starch in absolute dry quantity to prepare a 40% concentration of raw starch solution, and add 3-chloro-2-hydroxypropyl trimethazine to the static mixer at the same time Hydroxypropyl ammonium chloride and sodium hydroxide solution, after fully mixed, evenly dispersed into the original starch solution through the nozzle, the addition of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride is 10% of the dry weight of the original starch %, the amount of sodium hydroxide added is 2.5% of the absolute dry weight of the original starch, under the stirring of the agitator at a speed of 60 rpm, the temperature is controlled at about 50 degrees Celsius through the circulating water jacket, and the reaction is carried out for 4 hours to obtain the positive ion starch solution.

Embodiment approach 2

[0072] Add a certain amount of water to the reaction tank, and then add 4 tons of dry corn raw starch to prepare a 30% concentration of raw starch solution, and add 4-chloro-2-butenyl trimethyl to the static mixer at the same time Ammonium chloride and sodium hydroxide solution, after fully mixed, evenly dispersed into the original starch solution through the nozzle, the addition of 4-chloro-2-butenyltrimethylammonium chloride is 5% of the dry weight of the original starch %, the amount of sodium hydroxide added is 5% of the absolute dry weight of the original starch, under the stirring of the agitator at a speed of 60 rpm, the temperature is controlled at about 50 degrees Celsius through the circulating water jacket, and the reaction is carried out for 4 hours to obtain the cationic starch solution.

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Abstract

The invention discloses a method for preparing a cationic starch solution, which includes providing a raw starch solution, mixing a cationic etherification agent and an alkaline catalyst under a first predetermined condition to obtain a first mixed solution, and adding the first mixed solution to In the original starch solution, fully stir under the second predetermined condition to obtain the cationic starch solution; the present invention also provides a kind of cationic starch solution preparation equipment and the paper prepared by using the cationic starch solution preparation method, through the above-mentioned In this way, the present invention can improve the cationic starch substitution degree and paper strength.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a cationic starch solution preparation method, equipment and paper. Background technique [0002] In the paper industry, cationic starch can be used as a paper-making filler. Cationic starch is positively charged, which can be combined with negatively charged substrates, and can absorb and retain other negatively charged additives on the substrate, which can increase the size of pulp fine fibers , The retention rate of fillers and improve the dehydration of the paper machine, so as to improve the ash content and paper strength of the paper. [0003] The cationic starch solution prepared by the traditional process uses water as the solvent, disperses the starch in a large amount of water or forms a paste, and then adds an etherifying agent and alkali for etherification reaction; the cationic starch prepared by the traditional process has a low degree of substitution, and the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/12D21H17/29
Inventor 孙益军庄晓俊李俊
Owner GOLD EAST PAPER JIANGSU