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Method for preparing nitrogen- and potassium-containing superabsorbent resin from carboxymethyl sunflower disc

A technology of carboxymethyl sunflower and superabsorbent resin, which is applied in the field of superabsorbent resin, can solve the problems of increasing the synthesis cost of superabsorbent resin, the difficulty of popularizing and applying superabsorbent resin, and the large amount of use, so as to achieve low synthesis cost and omit acidification With the washing process, the effect of fast water absorption rate

Inactive Publication Date: 2016-11-23
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 nitrogen- and potassium-containing superabsorbent resin from carboxymethyl sunflower disc
  • Method for preparing nitrogen- and potassium-containing superabsorbent resin from carboxymethyl sunflower disc
  • Method for preparing nitrogen- and potassium-containing superabsorbent resin from carboxymethyl sunflower disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Weigh 2.5g of carboxymethyl sunflower discs, measure 25ml of deionized water, and fully stir the above materials. Weigh 5.67g of potassium hydroxide, measure 20ml of deionized water, and prepare a potassium hydroxide solution. Under the conditions of ice-water bath cooling and stirring, 14.6g (13.9ml) of acrylic acid was neutralized with the prepared potassium hydroxide solution. Weigh 2.92g of acrylamide and 10ml of deionized water to prepare a solution. Add 60mg of potassium persulfate initiator, 45mg of N,N'-methylenebisacrylamide crosslinking agent, prepared acrylamide solution and neutralized acrylic acid and its potassium salt solution in the reaction bottle, Stir at room temperature for half an hour to make it evenly mixed. 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. ...

Embodiment 2

[0019] Example 2: Weigh 2.5g of carboxymethyl sunflower discs, measure 25ml of deionized water, and fully stir the above materials. Weigh 7g of potassium hydroxide, measure 20ml of deionized water, and prepare a potassium hydroxide solution. Under the conditions of ice-water bath cooling and stirring, 15g (14.3ml) of acrylic acid was neutralized with the prepared potassium hydroxide solution. Weigh 5g of acrylamide and 10ml of deionized water to prepare a solution. Add 75mg of potassium persulfate initiator, 35mg of N,N'-methylenebisacrylamide crosslinking agent, the prepared acrylamide solution and the neutralized acrylic acid and its potassium salt solution in the reaction bottle, under nitrogen protection , and stirred at room temperature for half an hour to make it evenly mixed. 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 polym...

Embodiment 3

[0020] Example 3: Weigh 2.5g of carboxymethyl sunflower discs, measure 25ml of deionized water, and fully stir the above materials. Weigh 7.15g of potassium hydroxide, measure 20ml of deionized water, and prepare a potassium hydroxide solution. Under the conditions of ice-water bath cooling and stirring, 13.1 g (12.5 ml) of acrylic acid was neutralized with the prepared potassium hydroxide solution. Weigh 4.4 g of acrylamide, measure 10 ml of deionized water, and prepare a solution. Add 60mg of potassium persulfate initiator, 35mg of N,N'-methylenebisacrylamide crosslinking agent, the prepared acrylamide solution and the neutralized acrylic acid and its potassium salt solution in the reaction bottle, under the protection of nitrogen , and stirred at room temperature for half an hour to make it evenly mixed. 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 ...

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Abstract

The invention discloses a method for preparing a nitrogen- and potassium-containing superabsorbent resin from carboxymethyl sunflower discs, which is characterized in that: a certain amount of sodium hydroxide solution and sunflower disc powder are mixed in a three-necked bottle, soaked to fully swell the sunflower discs; Add sodium hydroxide solution dropwise to the mixture, stir in a water bath at 30°C for 1 hour, then add sodium chloroacetate solution dropwise to the reaction mixture, react for 2 hours, then pour it into a stainless steel plate and react in an oven, dry it with 70 % ethanol, then dried and crushed to obtain carboxymethyl sunflower discs. Mix acrylic acid and its potassium salt, acrylamide, carboxymethyl sunflower disc, potassium persulfate, N,N′-methylene bisacrylamide and deionized water evenly, protect with nitrogen, heat and stir in a water bath, when the polymerization temperature is reached Stop stirring, continue heating, keep the reaction in a boiling water bath for 2 hours, stop nitrogen flow, take out the reactant, put it in a blast oven at 40°C-60°C and dry it to constant weight, crush it to get the product.

Description

technical field [0001] The invention relates to a method for synthesizing a superabsorbent resin containing nitrogen and potassium elements by taking carboxymethyl sunflower disc, acrylic acid and acrylamide 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, improving the moisture retention performance of the soil, and promoting various nutrients in the soil. It can be used as oil field treatment agent, oil-water separation agent, etc. in petrochemical industry, 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02C08F220/56C08F220/06C08F222/38
Inventor 温国华郭玉婷王晓莉付渊陈超柳青韩宗壮杨永启张雨亭刘广华孙萌
Owner INNER MONGOLIA UNIVERSITY
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