Preparation method and use of cation guar gum graft copolymer retention and drainage agent

A technology of cationic guar gum and graft copolymer, which is applied in the system field, can solve problems such as uselessness, and achieve the effects of reducing white water turbidity, improving purification, and simple operation

Inactive Publication Date: 2007-02-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the aqueous graft copolymers of guar gum, hydroxypropyl guar gum and carboxymethyl guar gum and acrylamide integrate the advantages of natural polymers and synthetic polymers, and are used in the research of sewage flocculation treatment and heavy metal adsorbents There are

Method used

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  • Preparation method and use of cation guar gum graft copolymer retention and drainage agent

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] Disperse 100 grams of unpurified guar collagen powder into a mixture of 40 grams of alcohol and 10 grams of water, add to an ordinary three-necked flask, vent with nitrogen, stir well at room temperature, and add 10 grams of 3-chloro-2-hydroxypropane A solution of trimethylammonium chloride and 10 grams of water, add 10 grams of sodium hydroxide aqueous solution (50% sodium hydroxide concentration) dropwise, stir and mix uniformly, and then place the materials in a 65°C constant temperature oven for 3.5 hours to react. After cooling to room temperature, neutralizing the pH to 6-7 with a small amount of acetic acid, after suction filtration, the filter cake is placed in a vacuum oven at 65° C. for 12 hours to obtain a cationic guar gum product. The measured cationic substitution degree is 0.015.

[0042] Take 10 grams of the above product and dissolve it in 833 grams of distilled water to obtain a colorless and transparent solution. Stir in nitrogen and ad...

Example Embodiment

[0043] Example 2

[0044] Disperse 100 grams of unpurified guar collagen powder into a mixture of 70 grams of alcohol and 10 grams of water, add to an ordinary three-necked flask, vent with nitrogen, stir well at room temperature, and add 25 grams of 3-chloro-2-hydroxypropane A solution of trimethylammonium chloride and 10 grams of water, add 50 grams of sodium hydroxide aqueous solution (10% sodium hydroxide concentration) dropwise, stir and mix uniformly, and then place the material in a constant temperature oven at 75°C for 6 hours. Cool to room temperature, neutralize the pH to 6-7 with a small amount of acetic acid, filter with suction, and place the filter cake in a vacuum oven at 50°C for 24 hours to obtain a cationic guar gum product. The measured cationic substitution degree is 0.036.

[0045] Take 10 grams of the above product and dissolve it in 190 grams of distilled water to obtain a colorless and transparent solution. Stir in nitrogen gas and add a nitric acid solutio...

Example Embodiment

[0046] Example 3

[0047] Disperse 100 grams of unpurified guar collagen powder into a mixture of 20 grams of alcohol and 10 grams of water, add to an ordinary three-necked flask, vent with nitrogen, stir well at room temperature, and add 5 grams of 3-chloro-2-hydroxypropane A solution of trimethylammonium chloride and 10 grams of water was added dropwise to 10 grams of sodium hydroxide aqueous solution (50% sodium hydroxide concentration) and mixed evenly at high speed. Then the materials were placed in a constant temperature oven at 40°C for 6 hours. Cool to room temperature, neutralize the pH to 6-7 with a small amount of acetic acid, and place the filter cake in a vacuum oven at 75°C for 10 hours after suction filtration to obtain a cationic guar gum product. The measured cationic substitution degree is 0.008.

[0048] Take 10 grams of the above product and dissolve it in 323 grams of distilled water to obtain a colorless and transparent solution. Stir in nitrogen and add a ni...

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Abstract

The invention discloses a preparing method and application of positive ionic guar gum grafted copolymer retention and filter aid, which comprises the following steps: dispersing non-purified guar gum powder in the low-carbon alcohol/water solution, aerating nitrogen, stirring evenly at indoor temperature, adding positive ionic etherifying agent solution, dripping strong-alkaline catalyst, reacting at 40-75 deg.c to obtain positive ionic guar gum, allocating into colorless transparent solution, adding triggering agent, acrylamide and vinyl cationic monomer, adding adjuvant, reacting at 10-65 deg.c for 2-24h to obtain the product.

Description

technical field [0001] The invention relates to a preparation method of a multifunctional retention and drainage enhancer for paper pulp, which is suitable for wood pulp, waste paper pulp and straw pulp systems and systems aimed at producing high-grade functional paper. Background technique [0002] At present, the paper industry generally uses cationic acrylamide (CPAM) with a molecular weight of one million as a retention and drainage aid, but CPAM is not easy to biodegrade, and the residual monomers are very toxic, which limits its application in household paper and high-grade paper. Excessive CPAM will cause the charge reversal of the pulp system, greatly reduce the retention and drainage performance, and affect the formation of paper and the stable operation of the paper machine. Starch derivatives, especially cationic starches, have been widely recognized as drying and strengthening agents. However, due to the different sources of starch raw materials, various types, ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
Inventor 万小芳李友明汪晓军王艳霞宋林林
Owner SOUTH CHINA UNIV OF TECH
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