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Amphoteric guar gum and preparation method and application thereof

A technology of amphoteric guar gum and guar gum, applied in textiles and papermaking, retention aid addition, paper, etc., can solve the problems of poor storage stability of product aqueous solution, difficulty in solid-liquid separation, low production efficiency, etc., and achieve improved filtration The effect of water performance, simple process, and high conversion rate of reactants

Active Publication Date: 2011-07-06
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of amphoteric guar gum is mainly the continuous ethanol treatment method. This method is complicated in process, difficult in solid-liquid separation, low in production efficiency, and the storage stability of the product aqueous solution is poor, and stratification occurs after one week at room temperature.

Method used

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  • Amphoteric guar gum and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 200 parts of guar collagen powder, 80 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride, and mix them with 10 parts of sodium hydroxide, then evenly blend with guar gum, and heat up to 70°C under stirring , and kept at this temperature for 3 hours, cooled to room temperature, and the degree of substitution of the cationic etherifying agent was measured to be 0.79;

[0026] Dissolve 10 parts of sodium dihydrogen phosphate and 15 parts of sodium tripolyphosphate in 25 parts of water, then spray it on the cationic guar gum prepared above, raise the temperature to 40°C, keep it at this temperature for 4 hours, and cool to room temperature, neutralized with hydrochloric acid to a pH of 6.0, air-dried to reduce the water content to 9.5%, and the measured anion substitution degree DS was 0.1.

Embodiment 2

[0028] Take 200 parts of guar collagen powder, 40 parts of 4-chloro-2-butenyltrimethylammonium chloride, and mix them with 20 parts of sodium hydroxide, then evenly blend with guar gum, and heat up to 40°C under stirring , and kept at this temperature for 6 hours, cooled to room temperature, and the degree of substitution of the cationic etherifying agent was measured to be 0.22;

[0029] Dissolve 25 parts of disodium hydrogen phosphate and 15 parts of phosphorus oxychloride in 50 parts of water, then spray on the cationic guar gum prepared above and mix evenly, heat up to 70°C, and keep warm at this temperature for 2 hour, cooled to room temperature, and neutralized the pH value to 7.0 with glacial acetic acid neutralizer; the water content was reduced to 7.0% by air drying method, and the degree of anion substitution DS was measured as 0.58.

Embodiment 3

[0031] Take 200 parts of guar collagen powder, 60 parts of epoxypropyltrimethylammonium chloride, and mix them with 16 parts of sodium hydroxide evenly, then evenly blend with guar gum, heat up to 60°C under stirring, and Keep it warm for 4 hours, cool to room temperature, and the degree of substitution of the cationic etherifying agent is measured to be 0.56;

[0032] Dissolve 15 parts of disodium hydrogen phosphate and 15 parts of disodium hydrogen phosphate in 20 parts of water, then spray on the cationic guar gum prepared above and mix evenly, heat up to 60°C, and keep warm at this temperature for 3 hours, cooled to room temperature, and neutralized the pH value to 7.8 with hydrochloric acid; the water content was reduced to 8.0% by air drying method, and the anion substitution degree DS was measured to be 0.35.

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Abstract

The invention relates to a preparation method of amphoteric guar gum. The preparation method comprises the following steps of: (1) mixing an alkaline catalyst with a cation etherifying agent and spraying the mixture onto guar gum powder for reacting; and (2) spraying a composite anion solution onto a product obtained in the step (1), undergoing a reaction, neutralizing with an acid neutralizing agent until the pH is between 6 and 8, and drying to obtain a product, namely amphoteric guar gum. The amphoteric guar gum prepared by the method has the advantages of high substitution value, high viscosity stability, high transparency and good retention and drainage aiding effects when applied to papermaking.

Description

technical field [0001] The invention relates to an amphoteric guar gum, a preparation method and application thereof. Background technique [0002] Guar gum is a leguminous plant, which is a natural galactomannan, mainly grown in the arid regions of India and Pakistan. The main chain of its chemical structure is (1,4)-β-D mannose unit, and the side chain It is composed of α-D galactose and connected to the main chain by (1,6) bonds. Galactose is randomly distributed on the main chain, and this basically linear but branched structure determines that the properties of guar gum are significantly different from those of unbranched, water-insoluble glucomannan. It has a similar structure with cellulose, which determines that it has a natural affinity with cellulose. [0003] Guar collagen powder can be dissolved in water, but its dissolving speed in water is slow, and the defects of high water-insoluble content limit its application to a large extent, so people often use chemic...

Claims

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Application Information

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IPC IPC(8): C08B37/00D21H21/10D21H17/32
Inventor 施晓旦李改霞
Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD