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Method for synthesizing super absorbent resin by graft polymerization of carboxymethyl potato pulp

A technology of super absorbent resin and potato residue, applied in the field of synthesizing super absorbent resin, can solve problems such as environmental pollution, waste of resources, etc., and achieve the effects of low reaction temperature and reduced energy consumption

Inactive Publication Date: 2014-10-01
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] A large amount of waste potato slag is produced in the production process of potato starch, generally 7.5 tons of waste slag is produced per ton of starch. If it is not recycled, it will not only cause waste of resources, but also cause serious environmental pollution.

Method used

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  • Method for synthesizing super absorbent resin by graft polymerization of carboxymethyl potato pulp
  • Method for synthesizing super absorbent resin by graft polymerization of carboxymethyl potato pulp
  • Method for synthesizing super absorbent resin by graft polymerization of carboxymethyl potato pulp

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1: Weigh 3.47g sodium hydroxide (or 4.86g potassium hydroxide), dissolve it in 20.00ml deionized water, weigh 12.50g (11.90ml) acrylic acid, and dissolve sodium hydroxide (or hydroxide Potassium) solution was added dropwise to the above-mentioned acrylic acid, and kept stirring until the neutralization was completed and no heat was generated. Weighed 2.50g of carboxymethyl potato residues and mixed them with 30ml of deionized water evenly, and mixed the neutralized acrylic acid and its salt solution with Mix the carboxymethyl potato residue mixture evenly, add it to the reaction flask, and add 200 mg potassium persulfate, 154 mg sodium bisulfite, 30 mg N, N'-methylenebisacrylamide into the reaction flask, and then blow nitrogen into it. Slowly heat to increase the temperature of the reaction system gradually. When the polymerization reaction starts at 25-30°C, stop stirring and continue to feed nitrogen gas, gradually raise the temperature to 90°C and keep it at ...

Embodiment 2

[0025] Example 2: Weigh 5.83g sodium hydroxide (or 5.83g potassium hydroxide), dissolve it in 20.00ml deionized water, weigh 15.00g (14.30ml) acrylic acid, and dissolve sodium hydroxide (or hydroxide Potassium) solution was added dropwise to the above-mentioned acrylic acid, and kept stirring until the neutralization was completed and no heat was generated. Weighed 2.50g of carboxymethyl potato residues and mixed them with 30ml of deionized water evenly, and mixed the neutralized acrylic acid and its salt solution with Mix the carboxymethyl potato residue mixture evenly, add it into the reaction flask, and add 100mg of potassium persulfate, 77mg of sodium bisulfite, 35mg of N,N'-methylenebisacrylamide into the reaction flask. Heating to increase the temperature of the reaction system gradually. When the polymerization reaction starts at 40-45°C, stop stirring and continue to introduce nitrogen gas. Gradually raise the temperature to 90°C and keep it at this temperature for 2 ho...

Embodiment 3

[0026] Embodiment 3: Weigh 6.80g sodium hydroxide (or 6.80g potassium hydroxide), dissolve it in 20.00ml deionized water, weigh 17.50g (16.70ml) acrylic acid, and dissolve sodium hydroxide (or hydroxide Potassium) solution was added dropwise to the above-mentioned acrylic acid, and kept stirring until the neutralization was completed and no heat was generated. Weighed 2.50g of carboxymethyl potato residues and mixed them with 30ml of deionized water evenly, and mixed the neutralized acrylic acid and its salt solution with Mix the carboxymethyl potato residue mixture evenly, add it to the reaction flask, and add 175mg of potassium persulfate, 134.75mg of sodium bisulfite, 30mg of N, N'-methylenebisacrylic acid into the reaction flask. Heating to increase the temperature of the reaction system gradually. When the polymerization reaction starts at 30-35°C, stop stirring and continue to feed nitrogen gas, gradually increase the temperature to 90°C and keep it at this temperature fo...

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Abstract

The invention discloses a method for synthesizing super absorbent resin by graft polymerization of carboxymethyl potato pulp. The method is mainly characterized by comprising the following steps: firstly, neutralizing acrylic acid by using alkali, then, performing water bath heating under the protection of nitrogen by using N, N'-methylene bisacrylamide as a cross-linking agent and using potassium persulfate and sodium hydrogen sulfite as redox initiators so as to perform graft polymerization on the carboxymethyl potato pulp and partially neutralized acrylic acid at 25-45 DEG C to synthesize the super absorbent resin. The maximum amount of water absorption of an optimal product in 2000 times of deionized water reaches 1750 g / g, and the amount of water absorption reaches 2300 g / g in 10000 times of deionized water. The preparation method of the super absorbent resin disclosed by the invention has the following advantages: the maternal carboxymethyl potato pulp has good water solubility and needs no gelatinization, the graft polymerization reaction temperature is low and no high temperature reaction is needed, so that the super absorbent resin disclosed by the invention is simple in synthesis process, easy to operate, low in cost and excellent in product performance and is more suitable for mass scale production and product promotion.

Description

technical field [0001] The invention relates to a preparation method of a functional polymer material-superabsorbent resin used in the fields of agriculture, forestry and gardening, construction industry, environmental management, etc., especially refers to the synthesis of carboxymethyl potato residue, acrylic acid, sodium hydroxide (potassium) as the main raw materials The method of superabsorbent resin. Background technique [0002] A large amount of waste potato residue is produced in the production process of potato starch, generally 7.5 tons of waste residue is produced per ton of starch. If it is not recycled, it will not only cause waste of resources, but also cause serious environmental pollution. Discarded potato residues are rich in starch and cellulose. Generally, the starch and cellulose contents in the dry basis of potato residues are about 37% and 17%, respectively. Development and utilization can not only reduce environmental pollution, but also effectively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/06C08F222/38C08F4/40
Inventor 温国华杨永启郭玉婷李纯毅莫国莉付渊陈超柳青韩宗壮王晨雪孙萌
Owner INNER MONGOLIA UNIVERSITY
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