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Composite cationic starch and preparation method thereof, and method for making paper by using starch

A technology of cationic starch and its manufacturing method, which is applied in the field of papermaking, can solve the problems of increasing the cost of retaining additives, affecting the speed of the paper machine, and insufficient dehydration capacity of the pulp, so as to improve the dehydration capacity of the pulp, the retention of the system and the retention of ash , is conducive to the effect of speed

Inactive Publication Date: 2012-11-28
GOLD EAST PAPER JIANGSU
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Problems solved by technology

However, due to the recycling of high-grade mechanical pulp and highly enclosed white water in the papermaking system, the amount of anionic garbage in the system increases. After adding general cationic starch at the wet end, the system retention and pulp dehydration capacity are insufficient, which affects the increase in the speed of the paper machine and leads to Increased cost of retention aids

Method used

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  • Composite cationic starch and preparation method thereof, and method for making paper by using starch
  • Composite cationic starch and preparation method thereof, and method for making paper by using starch
  • Composite cationic starch and preparation method thereof, and method for making paper by using starch

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Embodiment Construction

[0016] Below in conjunction with a plurality of drawings, the compound cationic starch manufacturing method provided by the present invention, the compound cationic starch and the method for making paper with the compound cationic starch prepared by the method will be further described in detail.

[0017] see figure 1 , the invention provides a kind of manufacture method of composite cationic starch, described composite cationic starch manufacture method comprises the following steps:

[0018] In the first step, the raw starch is mixed with water to make a starch solution.

[0019] In this step, the raw starch can be mixed with water at normal temperature. The raw starch used can be any one or a mixture of tapioca raw starch, corn raw starch, potato raw starch and wheat raw starch. Potato starch and tapioca starch are preferred. The concentration of the prepared starch solution is 35% to 40%, preferably the concentration of the starch solution is 35%.

[0020] In the secon...

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Abstract

The invention provides a preparation method for composite cationic starch. The method comprises the following steps of: adding water into native starch, and mixing to obtain a starch solution; adding alkali and an etherifying agent into the starch solution with stirring, and reacting for 3 to 10 hours to obtain cationic starch; diluting a cationic starch solution, and gelatinizing; adding an initiator in an amount which is 0.1 to 1 percent based on the mass of the native starch and a modifier in an amount which is 0.1 to 1 percent based on the mass of the native starch into the gelatinized cationic starch, and reacting for 3 to 5 hours with stirring to make cationic starch molecules be subjected to cross-linking reaction so as to obtain the composite cationic starch. The invention also provides the composite cationic starch prepared by the method, and a method for making paper by using the composite cationic starch prepared by the method.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for manufacturing composite cationic starch used in papermaking, composite cationic starch prepared by the method and a method for making paper by using the composite cationic starch. Background technique [0002] Cationic starch is an important derivative of starch ether, and cationic starch is widely used in the paper industry. Cationic starch has a positive charge and can be closely combined with negatively charged fine fibers and fillers in the papermaking system. Therefore, it is widely used in the wet end of papermaking. It has the functions of reinforcement, retention and drainage, which can significantly enhance paper quality and reduce costs. . However, due to the recycling of high-grade mechanical pulp and highly enclosed white water in the papermaking system, the amount of anionic garbage in the system increases. After adding general cationic starch at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00C08B31/08C08B31/12D21H17/29
Inventor 王仁荣张明邓升鸿
Owner GOLD EAST PAPER JIANGSU
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