Method of preparing quaternary ammonium type cationic starch

A technology of cationic starch and quaternary ammonium type, applied in the field of preparation of quaternary ammonium type cationic starch, can solve the problems of poor enhancement effect and low substitution degree, and achieves enhanced water filtration effect, reasonable production process, reduced gelatinization temperature and low degree of substitution. Drenched effect

Inactive Publication Date: 2007-09-12
四平帝达变性淀粉有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, domestic similar products generally have shortcomings such as low substitution degree and poor reinforcement effect. After optimizing the production process, our company not only successfully solves the above problems, but also improves the reaction efficiency and reduces the production cost.

Method used

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  • Method of preparing quaternary ammonium type cationic starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First, add 1000 catties of cornstarch and 200 kg of sodium sulfate to 1800 kg of water in the reactor to form a starch slurry of 20 to 23 Be, stir continuously, and add sodium hydroxide with a mass concentration of 3 to 3.8% in the reactor to adjust the pH value to 12.0, then add 40 kg of 3-chloro-2-hydroxypropyltrimethylammonium chloride, heat up to 49 ° C for 20 hours, and ensure that the pH value is between 11.0 and 12.0. After the above-mentioned cross-linking etherification reaction is finished, use hydrochloric acid with a mass concentration of 9% to adjust the pH value to 6.0, first wash it with a cyclone washer, and then use a scraper type centrifugal dehydrator to dehydrate to a moisture content of ≤45%, and then use an airflow dryer Dried to make the moisture content reach ≤ 14.0%. The dried starch is sieved with an 80-100-mesh vibrating sieve, and packed in 20-25 kg / bag to finally obtain a finished product.

Embodiment 2

[0022] The steps are the same as in Example 1, except that tapioca starch is used as raw material, and the temperature of the etherification reaction process is maintained at 46°C.

Embodiment 3

[0024] The steps are the same as in Example 1, except that potato starch is used as the raw material, and the temperature in the etherification process is maintained at 47°C.

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Abstract

This invention relates to a synthesis method of quaternary ammonium cationic starch, which takes starch, quaternary ammonium, and sodium hydroxide as raw materials in water medium, and conducts eight steps of conditioning, alkalization, etherification, neutralization, washing, drying, screening, and packaging. The product is white powder, and gels to be the thick translucent gel heated to 50~66deg.C in water with DS values of 0.01 to 0.05. This invention is reasonable, makes the general starch has cationic performance and higher substitution, lowers the gelatinization temperature and freezing, so its effect can completely achieve the requirement of paper industry.

Description

technical field [0001] The invention relates to a preparation method of modified starch, in particular to a preparation method of quaternary ammonium cationic starch. Background technique [0002] Cationic starch is a very important class of starch ether derivatives, which are widely used in industrial fields such as papermaking, textiles, and oil field drilling. Its industrialization began in foreign countries in the 1960s. Because quaternary ammonium cationic starch is cationic in both acidic and alkaline conditions, it is especially suitable for papermaking under medium and alkaline conditions. Therefore, it has become an indispensable papermaking technology in today's rapid development of neutral papermaking technology. Adjuvant is also the most widely used and the largest amount of modified starch. It greatly reduces the gelatinization temperature of starch, and the Zeta potential rises to positive. With the increase of substitution degree, the viscosity, transparency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00
Inventor 王三平王云志曾蒲春
Owner 四平帝达变性淀粉有限公司
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