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Method for preparing super absorbent resin

A technology of superabsorbent resin and crosslinking agent, which is applied in the field of polymerized water-soluble polymer chemical additives, can solve the problems of poor water purification effect, increased dosing amount, and greater influence on flocculation effect, achieving fast water absorption speed, Good water absorption and easy preparation

Active Publication Date: 2012-06-27
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flocculation effect is greatly affected by the strong shearing action of the centrifuge, which makes the water purification effect worse and the dosage increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Parts by weight of each component:

[0019] Acrylic 100

[0020] 50% sodium hydroxide solution 120

[0021] N, N-methylenebisacrylamide 80

[0022] Deionized water 196

[0023] Methylene succinic acid 60

[0024] Initiator 0.5

[0025] The preparation process is:

[0026] 1. First add acrylic acid into the reaction kettle;

[0027] 2. Then neutralize with sodium hydroxide solution;

[0028] 3. Then add N, N-methylene bisacrylamide, deionized water, methylene succinic acid;

[0029] 4. Then start stirring, and pass high-purity nitrogen to remove oxygen;

[0030] 5. Under the protection of nitrogen, add an initiator and polymerize at 50°C for 5 hours;

[0031] 6. The colloid is granulated, dried and crushed to obtain a super absorbent resin.

Embodiment 2

[0033] Parts by weight of each component:

[0034] Acrylic 90

[0035] 50% sodium hydroxide solution 110

[0036] N, N-methylenebisacrylamide 120

[0037] Deionized water 200

[0038] Methylene succinic acid 100

[0039] Initiator 1.2

[0040] The preparation process is:

[0041] 1. First add / acrylic acid into the reaction kettle;

[0042] 2. Then neutralize with sodium hydroxide solution;

[0043] 3. Then add N, N-methylene bisacrylamide, deionized water, methylene succinic acid;

[0044] 4. Then start stirring, and pass high-purity nitrogen to remove oxygen;

[0045] 5. Under nitrogen protection, add an initiator and polymerize at 70°C for 4 hours;

[0046] 6. The colloid is granulated, dried and crushed to obtain a super absorbent resin.

Embodiment 3

[0048] Parts by weight of each component:

[0049] Acrylic 150

[0050] 50% sodium hydroxide solution 180

[0051] N,N-Methylenebisacrylamide 60

[0052] Deionized water 160

[0053] Methylene succinic acid 70

[0054] Initiator 1

[0055] The preparation process is:

[0056] 1. First add / acrylic acid into the reaction kettle;

[0057] 2. Then neutralize with sodium hydroxide solution;

[0058] 3. Then add N, N-methylene bisacrylamide, deionized water, methylene succinic acid;

[0059] 4. Then start stirring, and pass high-purity nitrogen to remove oxygen;

[0060] 5. Under the protection of nitrogen, add an initiator and polymerize at 80°C for 3.5 hours;

[0061] 6. The colloid is granulated, dried and crushed to obtain a super absorbent resin.

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PUM

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Abstract

The invention relates to the field of polymerization water-soluble high molecular auxiliary chemicals, in particular to a method for preparing super absorbent resin. The super absorbent resin comprises the following raw materials in parts by weight: 100 to 300 parts of acrylic acid, 100 to 300 parts of caustic soda solution with the mass concentration of 25 to 50 percent, 50 to 100 parts of cross linking agent, 100 to 300 parts of deionized water, 20 to 100 parts of reinforcing agent and 0.5 to 2 parts of redox initiator. The preparation method comprises the following steps of: after adding the acrylic acid into a reactor, adding the caustic soda solution to neutralize; then adding the cross linking agent and the reinforcing agent and filling nitrogen to remove oxygen; adding the initiator to carry out polymerization at a temperature of 30 to 80 DEG C; and after the reaction is completed, obtaining colloid and pelleting, drying and crushing the colloid to obtain the super absorbent resin. The super absorbent resin prepared by the method has higher water adsorption speed and larger water adsorption times. Compared with the existing super absorbent resin, the super absorbent resin prepared by the method can have better water adsorption and water retention effects under the condition of small using amount.

Description

technical field [0001] The invention relates to the field of polymerized water-soluble polymer chemical additives, in particular to a preparation method of a superabsorbent resin. Background technique [0002] In today's water treatment industry, the water quality is becoming more and more complex, and the requirements for water treatment chemicals are also increasing. Polyacrylamide, a commonly used polymer flocculant in the market, mostly has a linear structure. The flocculation effect is greatly affected by the strong shearing action of the centrifuge, which makes the water purification effect worse and the dosing amount increases. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a superabsorbent resin with a simple process and capable of significantly improving the water absorption speed and water retention capacity of SAP in view of the defects in the prior art. [0004] The present invention is realized th...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F222/38C08F4/40C08K5/092
Inventor 荣敏杰尹献孔许永升付欣
Owner SHANDONG NUOER BIOLOGICAL TECH
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