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Preparation method of super absorbent resin

A technology of superabsorbent resin and water immersion, which is applied in the field of superabsorbent resin preparation to achieve the effects of fast water absorption rate, wide source of raw materials and simple method

Inactive Publication Date: 2015-03-25
ADANA FOOD TECH LIUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The performance of the existing superabsorbent resin needs to be improved, and its development direction is environment-friendly, high water-absorbing performance, and low cost.

Method used

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  • Preparation method of super absorbent resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of superabsorbent resin, comprising the following steps:

[0018] A. Soak 100Kg of bagasse in water to remove residual sugar, then dry at 60°C, pulverize the bagasse with a pulverizer, and pass through a 20-mesh sieve to obtain bagasse powder;

[0019] B. Add 6.7L of water to the bagasse powder obtained in step A, mix well, then stir and gelatinize at 40°C for 50min;

[0020] C. neutralize acrylic acid with sodium hydroxide to obtain a sodium acrylate solution with a degree of neutralization of 0.5;

[0021] D. Add 200L of the sodium acrylate solution obtained in step C to the fully gelatinized bagasse powder obtained in step B, mix well, and then add 3Kg potassium persulfate, 3Kg sodium thiosulfate, 0.8Kg N, N'- Methylbisacrylamide, mixed evenly, and reacted at a temperature of 30°C for 4 hours;

[0022] E. After the reaction described in step D is completed, the obtained product is taken out and cooled, and vacuumized and rotary evaporated at 4...

Embodiment 2

[0024] A preparation method of superabsorbent resin, comprising the following steps:

[0025] A. Soak 100Kg bagasse in water to remove residual sugar, then dry at 80°C, and pulverize the bagasse with a pulverizer, and pass through a 40-mesh sieve to obtain bagasse powder;

[0026] B. Add 5L of water to the bagasse powder obtained in step A, mix evenly, stir and gelatinize at 60°C for 45min;

[0027] C. neutralize acrylic acid with sodium hydroxide to obtain a sodium acrylate solution with a degree of neutralization of 0.7;

[0028] D. Add 500L of sodium acrylate solution obtained in step C to the fully gelatinized bagasse powder obtained in step B, mix well, and then add 3.5Kg potassium persulfate, 3.5Kg sodium thiosulfate, 1KgN,N'- Methylenebisacrylamide, mixed evenly, reacted at a temperature of 50°C for 3 hours;

[0029] E. After the reaction described in step D is completed, the obtained product is taken out and cooled, and vacuumized and rotary evaporated at 40°C to 70...

Embodiment 3

[0031] A preparation method of superabsorbent resin, comprising the following steps:

[0032] A. Soak 100Kg bagasse in water to remove residual sugar, then dry at 100°C, and pulverize the bagasse with a pulverizer, and pass through a 60-mesh sieve to obtain bagasse powder;

[0033] B. Add 4L of water to the bagasse powder obtained in step A, mix evenly, and stir and gelatinize at 80°C for 20 minutes;

[0034] C. neutralize acrylic acid with sodium hydroxide to obtain a sodium acrylate solution with a degree of neutralization of 0.9;

[0035] D. Add 800L of sodium acrylate solution obtained in step C to the fully gelatinized bagasse powder obtained in step B, mix well, and then add 4Kg potassium persulfate, 3.5Kg sodium thiosulfate, 1.5KgN,N'- Methylenebisacrylamide, mixed evenly, reacted at a temperature of 60°C for 2 hours;

[0036] E. After the reaction described in step D is completed, the obtained product is taken out and cooled, and vacuumized and rotary evaporated at ...

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Abstract

The invention discloses a preparation method of super absorbent resin. The preparation method comprises the following steps: removing residual sugar of bagasse, then adding water to carry out gelatinization, and after gelatinization, adding a grafting monomer, an initiator and a crosslinking agent to carry out graft copolymerization to obtain the super absorbent resin. According to the preparation method disclosed by the invention, by virtue of an aqueous solution polymerization method, with natural cellulose contained in the bagasse as a skeletal material, the super absorbent resin is prepared by virtue of modification and grafting, so that the preparation method is simple and is wide in raw material source and cheap in raw materials; the super absorbent resin prepared by virtue of the preparation method has the characteristics of biodegradability, high water absorption rate and small influence applied by a pH value and salt; in addition, gel formed by the super absorbent resin after absorbing water is high in mechanical strength and good in keeping appearance shape and can be repeatedly used.

Description

technical field [0001] The invention relates to a preparation method of superabsorbent resin. Background technique [0002] Super Absorbent Polymer (SAP) is a new type of functional polymer material. It has a high water absorption function of absorbing water hundreds to thousands of times heavier than itself, and has excellent water retention performance. It is widely used in agriculture, hygiene products, forestry, building materials and other fields. In recent years, the average annual growth rate of the world's demand for superabsorbent resins has reached 30% to 40%, and the development prospects are broad. Divided by raw materials, superabsorbent resins include starch (graft, carboxymethylation, etc.), cellulose (carboxymethylation, graft, etc.), synthetic polymer (polyacrylic acid, polyvinyl alcohol, etc.) Department, polyoxyethylene department, etc.) several categories. Cellulose-based water-absorbent resin has a wide range of raw materials, good water absorption pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/06C08F222/38
Inventor 武雪董彬蒋天佑常志东
Owner ADANA FOOD TECH LIUZHOU
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