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New production process of polyacrylamide-based high-efficiency paper fiber dispersant

A technology of polyacrylamide and acrylamide monomer, which is applied in fiber dispersant addition, papermaking, textiles and papermaking, etc. It can solve the problems of slow dissolution rate, poor dispersion effect, and high water insoluble matter, so as to improve the hydration rate, The effect of reducing the critical concentration and regularizing the main chain of the molecule

Active Publication Date: 2011-12-28
DONGYING BAOMO ENVIRONMENT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, sodium alginate is expensive and is rarely used in papermaking; polyethylene oxide is currently the most widely used fiber dispersant at home and abroad, and has a good dispersing effect on long and short fibers, but due to its high price, it is subject to great limitations. ; At present, polyacrylamide dispersants have disadvantages such as slow dissolution rate, poor solubility, high water insoluble matter, poor dispersion effect, and large dosage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: Weigh 210 grams of acrylamide monomer, 45 grams of sodium carbonate, 1 gram of octylphenol polyoxyethylene ether, 10 grams of sodium bicarbonate, 42 grams of thiourea and 2.1 grams of allyloxynonylphenoxypropyl Alcohol polyoxyethylene ether sulfate is filled in a beaker with 790 grams of water, fully stirred, and the temperature is adjusted to 15°C. Then, the solution was poured into a vacuum flask to reduce the heat exchange between the system and the outside world, and nitrogen gas was introduced for 30 minutes to fully remove oxygen. Add 2 ml of 1% sodium formate, 1 ml of 1% 2,2-azobis(2-amidinopropane) hydrochloride, 1 ml of 1% sodium sulfite, 1 ml of 1% sodium persulfate, and cover the thermos cup Above, the polymerization was complete after 4 hours of adiabatic polymerization. The obtained jelly substance was taken out, heated to 80°C in a plastic bag for hydrolysis for 8 hours, purified with absolute ethanol, and dried in a vacuum desiccator at 65°C u...

Embodiment 2

[0009] Example 2: Weigh 210 grams of acrylamide monomer, 40 grams of sodium carbonate, 1 gram of sodium dodecylbenzenesulfonate, 15 grams of sodium bicarbonate, 12 grams of sodium hexametaphosphate and 2.1 grams of allyloxyhydroxypropyl Sodium sulfonate is contained in a beaker with 790 grams of water, fully stirred, and the temperature is adjusted to 15°C. Then, the solution was poured into a vacuum flask to reduce the heat exchange between the system and the outside world, and nitrogen gas was introduced for 30 minutes to fully remove oxygen. Add, 1 ml of 1% sodium formate, 1 ml of triethanolamine, 1 ml of 1% sodium sulfite, 1 ml of 1% sodium persulfate, cover the thermos cup, and complete the adiabatic polymerization after 4 hours. The obtained jelly substance was taken out, heated to 80°C in a plastic bag for hydrolysis for 8 hours, purified with absolute ethanol, and dried in a vacuum desiccator at 65°C until constant weight. The molecular weight of the obtained product ...

Embodiment 3

[0010] Example 3: Weigh 210 grams of acrylamide monomer, 45 grams of sodium carbonate, 10 grams of sodium bicarbonate, 12 grams of potassium pyrophosphate, 1 gram of sodium dodecylbenzenesulfonate and 2.1 grams of allyloxy hydroxypropyl sulfonate Sodium acid is contained in a beaker with 790 grams of water, fully stirred, and the temperature is adjusted to 15°C. Then, the solution was poured into a vacuum flask to reduce the heat exchange between the system and the outside world, and nitrogen gas was introduced for 30 minutes to fully remove oxygen. Add 1 milliliter of 1% azobisisobutylamidine hydrochloride, 1 milliliter of 1% sodium sulfite, and 1 milliliter of 1% sodium persulfate, cover the thermos cup, and complete the polymerization after 4 hours of adiabatic polymerization. The obtained jelly substance was taken out, heated to 80°C in a plastic bag for hydrolysis for 8 hours, purified with absolute ethanol, and dried in a vacuum desiccator at 65°C until constant weight. ...

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Abstract

The invention relates to a new process for producing a polyacrylamide high-efficiency papermaking fiber dispersant. Its technical scheme includes the following production process steps: pure water, sodium carbonate, sodium bicarbonate with a mass of 1%-10% of acrylamide, nonionic surfactant and anionic surfactant are sequentially added into a preparation kettle equipped with acrylamide. , the mass is 0.5%-20% functional monomer of acrylamide, and the mass is 1%-30% functional auxiliary agent of acrylamide, and the prepared liquid is injected into the polymerization kettle, and nitrogen gas is introduced to fully drive out oxygen. , adding an initiator to initiate polymerization; to obtain a gel-like product, the gel is formed into colloidal particles by a granulator, dried in a fluidized bed, and sent to a grinder after drying to be crushed, graded and packaged to obtain a paper-making fiber dispersant. The beneficial effects are as follows: the produced papermaking fiber dispersant has the advantages of good dispersion effect, high molecular weight, good water solubility, non-toxicity and high efficiency, low cost and the like.

Description

1. Technical field: [0001] The invention relates to a production method of a high-efficiency papermaking fiber dispersant, in particular to a new production process of a polyacrylamide-based high-efficiency papermaking fiber dispersant. 2. Background technology: [0002] Papermaking fiber dispersion is an important papermaking auxiliary, which determines the uniformity of fiber dispersion in water and is an important chemical auxiliary that affects the evenness of paper sheets. Dispersing the papermaking fiber into the pulp can reduce the surface tension of the pulp suspension, improve the wettability of the fiber surface, and reduce the flocculation caused by the fiber's hydrophobicity. Almost produces repulsion (anionic surfactant and anionic polymer); ②covers the surface of the fiber and acts as a protective colloid; ③forms a high-viscosity state around the fiber to prevent fiber collision and aggregation; ④surfactant has good adsorption and Suspension characteristics, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/08D21H17/42
Inventor 刘皓李岳军徐坤曹卫广王曰鹏
Owner DONGYING BAOMO ENVIRONMENT ENG CO LTD
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