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

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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 hum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[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 the acrylic acid to obtain an acrylic acid aqueous solution; then take 15.2g of deionized water to dissolve the sodium hydroxide, let it stand to cool to room temperature and slowly add it to the above acrylic acid aqueous solution, and use an ice water bath to control the neutralization temperature at 30°C Next, obtain a neutralization solution; take 28 g of deionized water, slowly add sodium humate to the deionized water, stir evenly, filter, and the filtrate is sodium humate solution; combine the above neutralization solution, sodium humate solution, potassium persulfate, N , N'-methylene bisacrylamide is placed in an Erlenmeyer flask, placed in an ultrasonic oscillator and shaken for 10 minutes to mix evenly; the above reaction premix is ​​placed in a round-bottom flask with a...

Example Embodiment

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

Example Embodiment

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

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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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