Preparation method of sodium carboxymethyl starch with superhigh viscosity

A technology of carboxymethyl starch sodium and viscosity, which is applied in the field of preparation of ultra-high viscosity sodium carboxymethyl starch, can solve the problems of low viscosity, narrow application range, poor transparency and other problems of carboxymethyl starch sodium products, and achieve the technical method Novelty, wide application range and good transparency

Inactive Publication Date: 2016-08-17
吴也平 +1
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Problems solved by technology

However, due to the technical problems of the current production of sodium carboxymethyl starch, the produced sodium carboxymethyl starch has the problems of low viscosity, low stability, and poor transparency, which cannot meet and adapt to the needs of use, and the scope of use is narrow , whose performance needs to be improved

Method used

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Embodiment Construction

[0011] The following describes the embodiments of the present invention in detail. A preparation method of ultra-high viscosity sodium carboxymethyl starch, the method includes the following steps:

[0012] ①. Add an ethanol solution with a concentration of 86% by mass into the reactor, put the starch into the reactor at a mass ratio of ethanol solution to starch of 4:1, and make starch milk at a temperature of 30-40°C;

[0013] ② Put NaOH into the reactor twice according to the mass ratio of starch to NaOH of 20:7, and conduct alkalization at 40-50℃;

[0014] ③ Put the cross-linking agent into the reactor according to the mass ratio of starch to cross-linking agent of 1000:6, and carry out the cross-linking reaction at a temperature of 40-50°C;

[0015] ④. Put the chloroacetic acid into the reaction kettle twice according to the mass ratio of starch to chloroacetic acid of 10:4, and react at 50-60℃ for 2-3h;

[0016] ⑤ After the reaction, neutralize with HCl to pH=7, centrifuge, wash ...

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Abstract

The preparation method of ultra-high viscosity sodium carboxymethyl starch belongs to the modified starch technology; the method steps are: starch and ethanol solution are made into starch milk in a reactor, and the starch milk is processed by using NaOH twice put into the reactor. Alkalinization, then put the cross-linking agent into the reactor for cross-linking reaction, put chloroacetic acid into the reactor twice to react for 2-3h, after the reaction, neutralize the pH=7 with HCl, centrifuge and wash with ethanol solution , centrifugal separation, and drying to obtain the product; the method is novel and reasonable, and the obtained sodium carboxymethyl starch has high viscosity, good transparency, strong stability and wide application range.

Description

Technical field [0001] The invention belongs to the modified starch technology, and mainly relates to a preparation method of ultra-high viscosity sodium carboxymethyl starch. Background technique [0002] At present, there is a huge amount of carboxymethyl cellulose products on the market, and sodium carboxymethyl starch is a new product that can replace carboxymethyl cellulose, with a broad market prospect. However, due to the technical problems of the current production of sodium carboxymethyl starch, the produced sodium carboxymethyl starch products have the problems of low viscosity, low stability and poor transparency, which cannot meet and adapt to the needs of use, and the scope of use is narrow. , Its performance needs to be improved. Summary of the invention [0003] The purpose of the present invention is to solve the above-mentioned problems in the prior art, and combine the performance requirements of the market for sodium carboxymethyl starch products, to study and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/12
CPCC08B31/006C08B31/12
Inventor 吴也平张昊蔺菲李国桐蔺保华
Owner 吴也平
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