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Preparation method of semi-interpenetrating water-absorbent resin particles

A water-absorbing resin, semi-interpenetrating technology, applied in the field of oilfield chemistry, to achieve the effects of high salt resistance, good water absorption and good water absorption capacity

Inactive Publication Date: 2016-07-06
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims at the problem that the water absorption and salt resistance of the superabsorbent resin synthesized by the aqueous solution polymerization method in the prior art can no longer meet the gradually increasing production demand, and provides a simple operation, higher water absorption and Salt resistance, preparation method of semi-interpenetrating water-absorbent resin particles suitable for a large number of industrial and agricultural production needs

Method used

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  • Preparation method of semi-interpenetrating water-absorbent resin particles
  • Preparation method of semi-interpenetrating water-absorbent resin particles

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Neutralize acrylic acid with 10% NaOH solution, control the neutralization degree of acrylic acid to 60% to obtain acrylic acid-sodium acrylate solution, then add dissolved acrylamide, allyl alcohol polyoxyethylene ether, polyvinyl alcohol solution to acrylic acid -Mix uniformly in sodium acrylate solution to obtain a mixed solution; wherein, the mass ratio of acrylic acid to acrylamide is 3:1, the addition of allyl alcohol polyoxyethylene ether is 4% of the total mass of acrylic acid and acrylamide, and the amount of polyvinyl alcohol The addition amount is 12% of the total mass of acrylic acid and acrylamide;

[0037](2) Add the cross-linking agent MBA to the mixed solution and stir evenly, then raise the temperature of the system to 65°C, add the initiator ammonium persulfate and stir for 15-20 minutes, then react for 2-3 hours to obtain rubber blocks; wherein, the amount of cross-linking agent It is 0.08% of the total mass of the monomer, and the addition amount...

Embodiment 2

[0040] (1) Neutralize acrylic acid with 10% NaOH solution, control the neutralization degree of acrylic acid to 90% to obtain acrylic acid-sodium acrylate solution, then add dissolved acrylamide, allyl alcohol polyoxyethylene ether, polyvinyl alcohol solution to acrylic acid -Mix uniformly in sodium acrylate solution to obtain a mixed solution; wherein, the mass ratio of acrylic acid to acrylamide is 5:1, the addition of allyl alcohol polyoxyethylene ether is 7% of the total mass of acrylic acid and acrylamide, and the amount of polyvinyl alcohol The addition amount is 14% of the total mass of acrylic acid and acrylamide;

[0041] (2) Add the cross-linking agent MBA to the mixed solution and stir evenly, then raise the temperature of the system to 65°C, add the initiator ammonium persulfate and stir for 15-20 minutes, then react for 2-3 hours to obtain rubber blocks; wherein, the amount of cross-linking agent It is 0.08% of the total mass of the monomer, and the addition amoun...

Embodiment 3

[0044] (1) Neutralize acrylic acid with 10% NaOH solution, control the neutralization degree of acrylic acid to 80% to obtain acrylic acid-sodium acrylate solution, then add dissolved acrylamide, allyl alcohol polyoxyethylene ether, polyvinyl alcohol solution to acrylic acid - Mixed uniformly in sodium acrylate solution to obtain a mixed solution; wherein, the mass ratio of acrylic acid to acrylamide is 4:1, the addition of allyl alcohol polyoxyethylene ether is 5% of the total mass of acrylic acid and acrylamide, and the amount of polyvinyl alcohol The addition amount is 12.5% ​​of the total mass of acrylic acid and acrylamide;

[0045] (2) Add the cross-linking agent MBA to the mixed solution and stir evenly, then raise the temperature of the system to 65°C, add the initiator ammonium persulfate and stir for 15-20 minutes, then react for 2-3 hours to obtain rubber blocks; wherein, the amount of cross-linking agent It is 0.08% of the total mass of the monomer, and the additio...

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Abstract

The invention discloses a preparation method of semi-interpenetrating water-absorbent resin particles. The preparation method comprises: firstly, neutralizing acrylic acid by using a sodium hydroxide solution, controlling the neutralization degree of the acrylic acid to be 60-90% to obtain an acrylic acid-sodium acrylate solution, then adding dissolved acrylamide, allyl alcohol polyoxyethylene ether and a polyvinyl alcohol solution into the acrylic acid-sodium acrylate solution, and mixing uniformly to obtain a mixed solution; secondly, adding a crosslinking agent into the mixed solution, stirring uniformly, then heating the system to 65 DEG C, adding an initiator, and stirring for 15-20min for reaction to obtain a rubber block; and finally, taking out the rubber block, and washing, drying and crushing the rubber block to obtain semi-interpenetrating water-absorbent resin particles. The preparation method disclosed by the invention is simple to operate, the prepared product has a semi-interpenetrating polymer network structure, the water absorption rate of the product in distilled water reaches 2100g / g or above, the liquid absorption rate of the product in 0.9% brine is also 150g / g or above, and the product is good in water absorbability and high in salt tolerance, and can meet actual needs of oilfield production.

Description

technical field [0001] The invention relates to a method for preparing superabsorbent resin particles, in particular to a method for preparing semi-interpenetrating water-absorbent resin particles, and belongs to the field of oil field chemistry. Background technique [0002] Superabsorbent resin is a new type of functional polymer material developed in recent years. Because the molecule contains a large number of carboxyl, hydroxyl and other hydrophilic groups, it has a strong water absorption capacity, and its water absorption multiple can reach hundreds of its own weight. times or even thousands of times, the water absorption speed is extremely fast, and the gel can be formed within tens of seconds. In addition, during the reaction process of preparing the superabsorbent resin, due to the slight cross-linking between molecules, it is insoluble in water and organic solvents. The superabsorbent resin has good dispersibility, is non-toxic and tasteless, can not be dehydrate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/08C08L29/04C08F283/06C08F220/06C08F220/56C08F222/38
CPCC08L51/08C08F283/065C08L29/04C08F220/06C08F220/56C08F222/38
Inventor 张太亮刘婉琴范开鑫
Owner SOUTHWEST PETROLEUM UNIV
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