Hydroxyalkyl cationic guar gum and its preparation method and application

A cationic guar gum and hydroxyalkyl cation technology, which is applied in textiles and papermaking, fiber raw material treatment, retention aid addition, etc., can solve the problems of complex synthesis steps, no public method, low degree of product substitution, etc., and achieve shortening The effect of reaction cycle, reduction of energy consumption, and shortening of reaction time

Inactive Publication Date: 2006-04-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problems of these patented technologies are that the synthesis steps are complicated, the degree of product substitution is low, and the method of using it as a pulp retention and drainage aid is not disclosed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 50 grams of unpurified guar collagen powder were dispersed into a mixed solution of 80 grams of industrial alcohol and 50 grams of water, added to a common three-necked bottle, ventilated with nitrogen, stirred at room temperature for 10 minutes, and added 10 grams of aqueous sodium hydroxide (hydrogen Sodium oxide concentration 25%) was soaked and alkalized for 1.5 hours, dripped 24 gram of 3-chlorine at room temperature, the solution of 2-hydroxypropyltrimethylammonium chloride and 10.5 gram of water, the time of adding was 20 minutes, then warming up to 55 degrees, after 3.5 hours of reaction, the material was transferred to the autoclave, and 5 grams of hexadecyl benzyl dimethyl ammonium chloride was added. gram of sodium hydroxide solution (concentration is 60%), and the reaction temperature spontaneously rises from room temperature to 40 degrees to react for 5 hours, cool down, and adjust the pH value to 8.5 with concentrated hydrochloric acid. The material is fil...

Embodiment 2

[0039] Disperse 50 grams of unpurified guar collagen powder into a mixture of 400 grams of isopropanol and 40 grams of water. After the materials are mixed, add them to a three-necked flask, ventilate nitrogen, stir at room temperature for 10 minutes, and add 50 grams of potassium hydroxide aqueous solution (concentration of potassium hydroxide 10%) was soaked and alkalized for 0.5 hour, added dropwise the solution of 10 gram epoxypropyltrimethylammonium chloride and 10 gram water at room temperature, and the time of adding was 20 minutes, then be warming up to 60 degree, After reacting for 3.0 hours, the material was transferred to the autoclave, and 5 grams of hexadecylbenzyldimethylammonium chloride was added. Under nitrogen and vacuum conditions, 10 grams of propylene oxide was inhaled, and the reaction temperature spontaneously increased from the chamber to 10 grams. The temperature was raised to 50°C and reacted for 1.5 hours, then the temperature was lowered to 35°C, and...

Embodiment 3

[0041] Disperse 50 grams of unpurified guar collagen powder into a mixture of 60 grams of tert-butanol and 60 grams of water. After the materials are mixed, add them to a three-necked bottle, vent nitrogen, stir at room temperature for 10 minutes, and add 30 grams of potassium hydroxide solution (concentration of potassium hydroxide 25%), soak and alkalinize at room temperature for 45 minutes, add dropwise 30 grams of homemade 3-chloro-2-hydroxypropylpyridine hydrochloride (light yellow transparent solution, effective concentration 70%), dropwise For 20 minutes, then at a temperature of 35 degrees, after reacting for 6 hours, the material was transferred to a high-pressure reactor, and 5.0 grams of cetylbenzyldimethylammonium chloride was added, and under nitrogen and vacuum conditions, Inhale 50 grams of propylene oxide, and the reaction temperature spontaneously rises from room temperature to 60 degrees to react for 4 hours, cool down, and adjust the pH value to 7.8 with citr...

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PUM

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Abstract

A process for preparing the cationic hydroxyalkyl guar gum includes such steps as dispersing the raw powder of guar gum in the aqueous solution of low-carbon alcohol, adding high-alkaline catalyst, immersing, adding cationic etherifying agent, cationic graft reaction, adding phase-transfer catalyst and alkoxy etherifying agent, hydro-xyalkylating reaction, neutralizing and filtering. It can be used as the retention aid or filter aid of paper pulp.

Description

technical field [0001] The invention relates to the field of retention and drainage aids for paper pulp, and specifically uses guar gum as a raw material to prepare waste paper pulp, wood pulp and straw pulp systems and retention and drainage aids in the process of making high-grade functional paper. Background technique [0002] At present, modified starch and cationic polyacrylamide (CPAM) are generally used as retention and drainage aids in the paper industry, but domestic starch raw materials come from different sources, there are many types, and the proportions of amylose and amylopectin are different, which seriously affects its modification. The stability of product quality limits its popularization and application. Larger domestic paper mills had to use wet-end additives produced by large foreign companies, resulting in increased paper costs. On the other hand, cationic polyacrylamide is not easy to biodegrade, and the residual monomer has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/10D21H17/21
Inventor 万小芳李友明汪晓军宋林林
Owner SOUTH CHINA UNIV OF TECH
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