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Low monomer residue humic acid sodium type super water-absorbed resin and preparation method

A technology of super absorbent resin and sodium humate, applied in the field of organic polymer compounds, can solve the problems of high residual unsaturated olefin, low utilization rate of humic acid, long process flow, etc. Residual amount, simple process effect

Inactive Publication Date: 2009-09-23
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method uses coal as a raw material, the cost of raw materials is low, but due to the increase of the extraction process of humic acid, the process flow is long, the waste is increased, the utilization rate of humic acid is low, and the reaction time of solution polymerization is longer.
The above-mentioned methods all adopt solution polymerization, and there is still the problem of relatively high residual amount of unsaturated olefins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Weigh 14g of sodium humate, 16g of acrylic acid, 3.8g of sodium hydroxide, 0.4g of potassium persulfate, and 0.1g of N,N'-methylenebisacrylamide. Take 17.6g of deionized water to dilute acrylic acid to obtain an aqueous solution of acrylic acid; then take 15.2g of deionized water to dissolve sodium hydroxide, let it stand and cool to room temperature, then slowly add it to the above-mentioned acrylic acid solution, and use an ice water bath to control the neutralization temperature at 30°C The following is to obtain neutralizing solution; get 28g deionized water, slowly add sodium humate into deionized water and stir evenly, filter, and the filtrate is sodium humate solution; mix above-mentioned neutralizing solution, sodium humate solution and potassium persulfate, N , N'-methylenebisacrylamide was placed in a conical flask, placed in an ultrasonic oscillator and oscillated for 10 minutes to mix evenly; the above reaction premix was placed in a round bottom f...

Embodiment 2

[0025] Example 2: Weigh 18g of sodium humate, 17g of acrylic acid, 5g of potassium hydroxide, 0.55g of ammonium persulfate, and 0.085g of piperazine bisacrylamide. Take 15.3g of deionized water to dilute acrylic acid to obtain an aqueous solution of acrylic acid; then take 17.5g of deionized water to dissolve potassium hydroxide, let it stand and cool to room temperature, then slowly add it to the above-mentioned acrylic acid solution, and use an ice water bath to control the neutralization temperature at 30°C The following is to obtain the neutralizing solution; get 34.2g deionized water, slowly add sodium humate into the deionized water and stir evenly, filter, and the filtrate is a sodium humate solution; mix the above neutralizing solution, sodium humate solution and ammonium persulfate, Piperazine bisacrylamide was placed in a Erlenmeyer flask, placed in an ultrasonic oscillator and oscillated for 18 minutes to mix evenly; the above reaction premix was placed in a round-bo...

Embodiment 3

[0026] Example 3: Weigh 15 g of sodium humate, 17.5 g of acrylic acid, 6.5 g of ammonia water, 0.23 g of azobisisobutyronitrile, and 0.15 g of piperazine bisacrylamide. Take 17.5g of deionized water to dilute acrylic acid to obtain an acrylic acid aqueous solution; then take 24g of deionized water to dilute ammonia water, let it cool to room temperature, then slowly add it to the above-mentioned acrylic acid aqueous solution, and use an ice-water bath to control the neutralization temperature below 30°C to obtain Neutralizing solution: take 29g deionized water, slowly add sodium humate into deionized water and stir evenly, filter, the filtrate is sodium humate solution; mix the above neutralizing solution, sodium humate solution and azobisisobutyronitrile, Put oxazine bisacrylamide in a Erlenmeyer flask, put it into an ultrasonic oscillator and vibrate for 20 minutes to mix evenly; put the above reaction premix into a round-bottomed flask with a capillary, and then place it in ...

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Abstract

The invention relates to a low monomer residue humic acid sodium type super water-absorbed resin and a preparation method, belonging to the technical field of organic high molecular compound. The invention is used for solving the problem that the humic acid sodium type super water-absorbed resin has high monomer residue and is characterized in that the resin comprises matters of the following weight unit: 14-18 of humic acid sodium, 16-17.5 of acrylic acid, 3.8-6.5 of neutralizing agent, 0.23-0.55 of evocating agent, and 0.085-0.15 of cross linker. The product has high humic acid sodium content. The method replaces a conventional heating method with a microwave polymerization method, greatly increases the polymerization reaction yield and reaction degree, and leads the super water-absorbed resin to reach knockdown low monomer residue. Compared with the conventional product produced by the prior art, the multiplying power of the product absorbing de-ionized water is increased by about 40%, the multiplying power of the product absorbing 0.9% of NaCI water solution is increased by about 80%, and the monomer residual quantity is 5-6% of the conventional product, thus greatly increasing use safety.

Description

technical field [0001] The invention relates to a water-absorbing resin and a preparation method thereof, in particular to a low-monomer residual sodium humate type superabsorbent resin prepared by microwave radiation polymerization and a preparation method thereof, belonging to the technical field of organic polymer compounds. Background technique [0002] As a functional polymer material, superabsorbent resin SAP was born in the 1960s. In recent years, countries around the world have conducted a lot of research on superabsorbent resin in terms of system, type, preparation method, performance improvement, and application fields. work and achieved a series of research results. In 1978, Sanyo Chemical Corporation of Japan, considering the toxicity of acrylonitrile monomer residues in polymers and unsafe hygiene, proposed a synthesis method of graft copolymerization of starch, acrylic acid, and cross-linking monomers, and in 1979 1,000 tons / year production equipment was put i...

Claims

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Application Information

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IPC IPC(8): C08F220/06
Inventor 孙晓然刘栋
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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