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Method for preparing superabsorbent resin by graft copolymerization of carboxymethyl potato residue

A technology of superabsorbent resin and potato residue, which is applied in the field of preparation of superabsorbent resin, can solve problems such as environmental pollution and waste of resources, and achieve the effects of simple preparation method, cost saving, and reduced equipment requirements

Active Publication Date: 2018-04-06
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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 preparing superabsorbent resin by graft copolymerization of carboxymethyl potato residue
  • Method for preparing superabsorbent resin by graft copolymerization of carboxymethyl potato residue
  • Method for preparing superabsorbent resin by graft copolymerization of carboxymethyl potato residue

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: Weigh 5.00g of sodium hydroxide, measure 20.0ml of deionized water, prepare a sodium hydroxide solution, and neutralize 12.86g (12.25ml) of acrylic acid under the conditions of cooling and stirring in an ice-water bath. Weigh 2.50g of carboxymethyl potato residue, 2.14g of acrylamide, 125.00mg of potassium persulfate, 96.25mg of sodium bisulfite, 25.00mg of N,N'-methylenebisacrylamide, and weigh 35.0ml of deionized water, All were added to the reactor, and the prepared acrylic acid and its sodium salt solution were poured into the reactor, and stirred at room temperature for 1.0 h to make it evenly mixed. Stir and heat under the protection of nitrogen, and control the heating speed at the same time, so that the temperature of the water bath rises slowly. When the temperature rises to 35-40 °C, stop stirring, and then gradually heat up. When the water in the water bath reaches boiling, continue to heat to make It was reacted in this temperature range for 1-2 h...

Embodiment 2

[0020] Example 2: Weigh 5.21g of sodium hydroxide, measure 20.0ml of deionized water, prepare a sodium hydroxide solution, and neutralize 10.42g (9.92ml) of acrylic acid under the conditions of cooling and stirring in an ice-water bath. Weigh 2.50g of carboxymethyl potato residue, 2.08g of acrylamide, 100.00mg of potassium persulfate, 77.00mg of sodium bisulfite, 25.00mg of N,N'-methylenebisacrylamide, and weigh 35.0ml of deionized water, All were added to the reactor, and the prepared acrylic acid and its sodium salt solution were added to the reactor, and stirred at room temperature for 1.0 h to make it evenly mixed. Stir and heat under the protection of nitrogen, and control the heating speed at the same time to slowly increase the temperature of the water bath. When the temperature rises to 40-45 °C, stop stirring, and then gradually heat up. When the water in the water bath reaches boiling, continue to heat to make It was reacted in this temperature range for 1-2 h, the n...

Embodiment 3

[0021] Example 3: Weigh 6.56g of sodium hydroxide, measure 20.0ml of deionized water, prepare a sodium hydroxide solution, and neutralize 13.13g (12.5ml) of acrylic acid under the conditions of cooling and stirring in an ice-water bath. Weigh 2.50g of carboxymethyl potato residue, 4.38g of acrylamide, 125.00mg of potassium persulfate, 96.25mg of sodium bisulfite, 30.00mg of N,N'-methylenebisacrylamide, and weigh 35.0ml of deionized water, All were added to the reactor, and the prepared acrylic acid and its sodium salt solution were poured into the reactor, and stirred at room temperature for 1.0 h to make it evenly mixed. Stir and heat under the protection of nitrogen, and control the heating speed at the same time, so that the temperature of the water bath rises slowly. When the temperature rises to 35-40 °C, stop stirring, and then gradually heat up. When the water in the water bath reaches boiling, continue to heat to make It was reacted in this temperature range for 1-2 h,...

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Abstract

The invention discloses a method for preparing super absorbent resin by grafting and copolymerizing carboxymethyl potato pulp. The main process is as follows: under ice-water bath cooling, carrying out neutralization reaction by using sodium hydroxide liquor and polymerization inhibitor-removed acrylic acid, adding neutralized liquor into a reaction container which contains carboxymethyl potato pulp, acrylamide, potassium persulfate, sodium hydrogen sulfite, N, N'- methylene bisacrylamide and deionized water for sufficiently mixing uniformly, stirring under nitrogen gas protection, heating in water bath, stopping stirring while heating to 25-45 DEG C, preserving heat for 2 hours in boiling water bath, then stopping ventilating nitrogen gas, taking out a product and shearing the product into small blocks, drying in an oven of 40 DEG C-60 DEG C until weight is constant, crushing to obtain a product. Compared with water-absorbent resin on the market, the super absorbent resin prepared by the method disclosed by the invention has water absorption capacity which is greatly improved, and low preparation cost, and therefore, the method has a very good application prospect in water retention of arid area soil, desert prevention and treatment, gardening of agriculture and forestry, and the like.

Description

technical field [0001] The invention relates to a preparation method of a superabsorbent resin used in the fields of agriculture, forestry, horticulture and the like. The super absorbent resin has been widely used in the above-mentioned fields. The product of the present invention greatly reduces the cost due to the rational use of discarded potato residues, and the application of redox initiators greatly reduces the polymerization temperature, so that the cost of the prepared super absorbent resin is low, and the product The excellent performance makes it have broad application prospects in the above-mentioned fields. Background technique [0002] Super absorbent resin is a kind of functional polymer material that has developed rapidly in recent years. It not only has high water absorption, but also is not easy to lose water even under pressure after absorbing water, so it is widely used in agriculture, gardening and desert management and other fields. [0003] Starch-bas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/06C08F220/56C08F222/38
Inventor 温国华杨永启冯凯李继萍付渊王晓莉陈超柳青周硕硕马贺成赵红霞
Owner INNER MONGOLIA UNIVERSITY
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