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Method for preparing super absorbent resin by carboxymethyl bagasse

A technology of superabsorbent resin and bagasse, which is applied in the direction of chemical instruments and methods, applications, organic fertilizers, etc., can solve the problems of large usage, increased synthesis cost of superabsorbent resin, difficulty in popularization and application of superabsorbent resin, etc., to achieve water absorption Fast speed, low synthesis cost, and the effect of omitting acidification and washing processes

Inactive Publication Date: 2014-11-26
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the above-mentioned types, the main hydrophilic monomer used is acrylic acid. In the past, the amount of hydrophilic monomer used in the synthesis of superabsorbent resins was very large, which greatly increased the synthesis cost of superabsorbent resins, resulting in It is difficult to popularize and apply superabsorbent resins, and domestic high-quality superabsorbent resin products mostly rely on imports, so research new methods or develop new varieties to produce high-quality superabsorbent resin products, and improve domestic superabsorbent resin products in the world. Market share is very important

Method used

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  • Method for preparing super absorbent resin by carboxymethyl bagasse
  • Method for preparing super absorbent resin by carboxymethyl bagasse
  • Method for preparing super absorbent resin by carboxymethyl bagasse

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Example 1: Weigh 2.5g of carboxymethyl bagasse, measure 25ml of deionized water, and fully stir the above materials. Weigh 6.67g of sodium hydroxide, measure 20ml of deionized water, and prepare a sodium hydroxide solution. Under the conditions of ice-water bath cooling and stirring, 15g (14.3ml) of acrylic acid was neutralized with the prepared sodium hydroxide solution. Add 75mg of potassium persulfate initiator, 30mg of N,N'-methylenebisacrylamide crosslinking agent and neutralized acrylic acid and its sodium salt solution into the reaction bottle, and stir at room temperature for half an hour under nitrogen protection. Mix it well. At the same time, the heating rate is controlled, so that the temperature of the water bath is raised slowly, so that the reaction is fully carried out, and the stirring is stopped when the polymerization temperature is reached. Thereafter, the temperature was gradually raised. When the temperature of the water bath was 90°C-100°C, the ...

Embodiment 2

[0016] Example 2: Weigh 2.5g of carboxymethyl bagasse, measure 25ml of deionized water, and fully stir the above materials. Weigh 4.17g of sodium hydroxide, measure 20ml of deionized water, and prepare a sodium hydroxide solution. Under the conditions of ice-water bath cooling and stirring, 15g (14.3ml) of acrylic acid was neutralized with the prepared sodium hydroxide solution. Add 100mg of potassium persulfate initiator, 50mg of N,N'-methylenebisacrylamide crosslinking agent and neutralized acrylic acid and its sodium salt solution into the reaction flask, and stir at room temperature for half an hour under nitrogen protection. Mix it well. At the same time, the heating rate is controlled, so that the temperature of the water bath is raised slowly, so that the reaction is fully carried out, and the stirring is stopped when the polymerization temperature is reached. Thereafter, the temperature was gradually raised. When the temperature of the water bath was 90°C-100°C, the ...

Embodiment 3

[0017] Example 3: Weigh 2.5g of carboxymethyl bagasse, measure 25ml of deionized water, and fully stir the above materials. Weigh 5.83g of sodium hydroxide, measure 20ml of deionized water, and prepare a sodium hydroxide solution. Under the conditions of ice-water bath cooling and stirring, 17.5g (16.7ml) of acrylic acid was neutralized with the prepared sodium hydroxide solution. Add 100mg of potassium persulfate initiator, 43mg of N,N'-methylenebisacrylamide crosslinking agent and neutralized acrylic acid and its sodium salt solution into the reaction bottle, and stir at room temperature for half an hour under nitrogen protection. Mix it well. At the same time, the heating rate is controlled, so that the temperature of the water bath is raised slowly, so that the reaction is fully carried out, and the stirring is stopped when the polymerization temperature is reached. Thereafter, the temperature was gradually raised. When the temperature of the water bath was 90°C-100°C, t...

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Abstract

The invention discloses a method for preparing super absorbent resin by carboxymethyl bagasse, which comprises the following steps: mixing a certain amount of sodium hydroxide solution and bagasse powder in a three-mouth bottle, immersing for fully swelling the bagasse; adding the sodium hydroxide solution in a mixture, placing in a water-bath pan at 35 DEG C for stirring for 1 hour, adding a sodium chloroacetate solution in the reaction mixture, then dumping the reaction mixture in a stainless steel disc for reacting for 2 hours in a roasting oven at 75 DEG C, drying and washing by ethanol with concentration of 70%, drying and crushing to obtain the carboxymethyl bagasse, uniformly mixing acrylic acid, sodium salt, the carboxymethyl bagasse, potassium persulphate, N,N'-methylene bisacrylamide and deionized water, protecting by nitrogen, performing water-bath heating and stirring, stopping stirring when polymerization temperature is reached, continuously heating, insulating and reacting for 2 hours in boiling water bath, stopping introduction of nitrogen, removing a reaction object, cutting into small blocks, placing in an air blast roasting oven at 40-60 DEG C and drying to constant weight, and crushing to obtain the product.

Description

technical field [0001] The invention relates to a method for synthesizing superabsorbent resin with carboxymethyl bagasse, acrylic acid and the like as main raw materials. The superabsorbent resin prepared by this method has a wide range of uses in many fields, such as improving the soil aggregate structure in agriculture and forestry, increasing the water permeability and air permeability of the soil, and improving the moisture retention performance of the soil; it can be used in petrochemical industry It is used as oilfield treatment agent, oil-water separation agent, etc., and has achieved great success in the above fields. Background technique [0002] Superabsorbent Resin (SAR), also known as superabsorbent polymer (SAP), super absorbent, etc., it is a kind of resin containing a large amount of -OH, -COOH, -COONa, -CONH 2 It is a new type of functional polymer material with strong hydrophilic groups and moderately cross-linked three-dimensional network structure. Becau...

Claims

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Application Information

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IPC IPC(8): C08F289/00C08F220/06C08F222/38C09K17/32
Inventor 温国华郭玉婷杨永启冯凯刘广华韩宗壮王晨雪胡振华巴音其木格王丹孙萌
Owner INNER MONGOLIA UNIVERSITY
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