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Preparation method of anionic polyacrylamide

The technology of polyacrylamide and acrylamide, which is applied in the field of preparation of anionic polyacrylamide, can solve the problems of long polymerization reaction and material aging time, long polymerization reaction and hydrolysis time, low equipment utilization efficiency, etc., and is beneficial to industrialization. Production and application, improving reaction efficiency and production efficiency, high utilization efficiency

Inactive Publication Date: 2011-10-19
邵赛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, No. CN1168894 Chinese patent document discloses a preparation method of high molecular weight anionic polyacrylamide. The method is to hydrolyze after alkali polymerization, by controlling the pH value of the reaction system, and adding persulfate, water-soluble organic azo salt and Nitrotriacrylamide multi-initiator initiates homopolymerization of acrylamide aqueous solution, then hydrolyzes, dries, and pulverizes to obtain powdery anionic polyacrylamide. This reaction also emits ammonia gas, and the polymerization reaction and hydrolysis take a long time
[0004] In addition, in the prior art, there is also a process for preparing anionic polyacrylamide by copolymerization of acrylamide and acrylic acid. Although no ammonia gas is generated in the whole process, the polymerization reaction and material maturation time are long, usually about 6 hours, and the concentration of the reaction system is low. (Generally about 30%), low utilization efficiency of equipment, high energy consumption and large investment

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  • Preparation method of anionic polyacrylamide

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Effect test

Embodiment 1

[0021] A preparation method of anionic polyacrylamide of the present invention, comprises the following steps:

[0022] (1) Prepare raw materials:

[0023] Prepare each raw material component in the following mass:

[0024] Acrylamide 18g

[0025] Acrylic acid 25g

[0026] Sodium hydroxide 10g

[0027] Potassium persulfate 0.1g

[0028] Sodium thiosulfate 0.1g

[0029] Ascorbic acid 0.01g

[0030] Isopropanol 0.15g and

[0031] water 100g;

[0032] (2) Mixing preparation: Dissolve the above 10g of sodium hydroxide in 80g of water and neutralize with 25g of acrylic acid, then add 18g of acrylamide to the neutralized mixed solution to obtain mixed solution A, and then use 15g of water Dissolve 0.1g of sodium thiosulfate, 0.01g of ascorbic acid and 0.15g of isopropanol to obtain mixed solution B, then dissolve 0.1g of potassium persulfate with 5g of water to obtain mixed solution C, and then prepare mixed solution B Add to mixture A, and finally add mixture C;

[0033] ...

Embodiment 2

[0035] A preparation method of anionic polyacrylamide of the present invention, comprises the following steps:

[0036] (1) Prepare raw materials:

[0037] Prepare each raw material component in the following mass:

[0038] Acrylamide 25g

[0039] Acrylic acid 37.5g

[0040] Sodium hydroxide 15g

[0041] Potassium persulfate 0.1g

[0042] Sodium thiosulfate 0.05g

[0043] Ascorbic acid 0.01g

[0044] Isopropanol 10g and

[0045] 40g of water;

[0046] (2) Mixing preparation: Dissolve the above 15g of sodium hydroxide in 30g of water and neutralize with 37.5g of acrylic acid, then add 25g of acrylamide to the neutralized mixed solution to obtain mixed solution A, then use 5g of Dissolve 0.05g of sodium thiosulfate, 0.01g of ascorbic acid and 10g of isopropanol in water to obtain mixed solution B, then dissolve 0.1g of potassium persulfate in 5g of water to obtain mixed solution C, and then prepare mixed solution B Add to mixture A, and finally add mixture C;

[0047] ...

Embodiment 3

[0049] A preparation method of anionic polyacrylamide of the present invention, comprises the following steps:

[0050] (1) Prepare raw materials:

[0051] Prepare each raw material component in the following mass:

[0052] Acrylamide 25g

[0053] Acrylic acid 50g

[0054] Sodium hydroxide 20g

[0055] Potassium persulfate 0.3g

[0056] Sodium thiosulfate 0.08g

[0057] Ascorbic acid 0.015g

[0058] Isopropanol 1g and

[0059] 110g of water;

[0060](2) Mixing preparation: Dissolve the above-mentioned 20g of sodium hydroxide in 80g of water and neutralize with 50g of acrylic acid, then add 25g of acrylamide to the neutralized mixed solution to obtain mixed solution A, and then use 15g of water to Dissolve 0.08g of sodium thiosulfate, 0.015g of ascorbic acid and 1g of isopropanol to obtain mixed solution B, then dissolve 0.3g of potassium persulfate in 15g of water to obtain mixed solution C, and then add the prepared mixed solution B to In the mixture A, add the mixtu...

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Abstract

The invention belongs to a preparation method of a copolymer of an unsaturated aliphatic compound, more particularly discloses a preparation method of anionic polyacrylamide. The preparation method comprises the following steps of: preparing raw materials for preparation, wherein the raw materials for preparation comprise acrylamide, acrylic acid, sodium hydroxide, potassium sulfate, sodium thiosulfate, ascorbic acid, a molecular weight regulator and water; dissolving the sodium hydroxide in water and neutralizing with the acrylic acid, adding the acrylamide into the neutralized mixed solution to obtain a mixed solution A; then dissolving the sodium thiosulfate, the ascorbic acid and the molecular weight regulator in water to obtain a mixed solution B; dissolving the potassium persulfate in water to obtain a mixed solution C; then adding the mixed solution B into the mixed solution A and finally adding the mixed solution C; and initiating a polymerization reaction at the temperature of 15 to 45 DEG C, insulating heat and naturally heating, pelleting, drying and crushing after the reaction is finished to obtain polyacrylamide powder. The preparation method has the advantages of short reaction time, low preparation cost, less energy consumption, environmental protection and safety, and the like.

Description

technical field [0001] The invention relates to a preparation method of a copolymer having an unsaturated aliphatic compound, in particular to a preparation method of an acrylamide polymer. Background technique [0002] In the existing anionic polyacrylamide synthesis technology, the process of hydrolyzing acrylamide after polymerization is mainly used. The usual method is to dissolve acrylamide in water, add an initiator to polymerize, and complete the polymerization after a long period of reaction. Finally, the product is in the form of block gel, which is cut into small pieces and then added with alkali for hydrolysis, and then granulated and dried after hydrolysis. Ammonia gas is emitted during the hydrolysis process, and waste gas such as ammonia gas needs to be treated. For example, Chinese Patent Document No. CN101157736A discloses a method for preparing high-molecular-weight anionic polyacrylamide by ultra-low temperature initiation. Polymerization, after polymeriz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F4/40C08F2/38
Inventor 邵赛郑昌群李仲华
Owner 邵赛