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Composition capable of initiating polymerization reaction, and acrylamide copolymer preparation method

A technology of polymerization reaction and composition, which is applied in the field of composition with the function of initiating polymerization reaction and the preparation of acrylamide copolymer, which can solve the problems of practicability to be improved, cumbersome process operation, and small molecular weight of the product

Inactive Publication Date: 2018-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical shear resistance of the polymer obtained by the above method is enhanced, but the process operation is relatively cumbersome, and the molecular weight of the obtained product is small, so the practicability needs to be improved

Method used

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  • Composition capable of initiating polymerization reaction, and acrylamide copolymer preparation method
  • Composition capable of initiating polymerization reaction, and acrylamide copolymer preparation method
  • Composition capable of initiating polymerization reaction, and acrylamide copolymer preparation method

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Embodiment approach

[0030] According to a preferred embodiment of the present invention, the composition also contains a water-soluble azo initiator, and the organic amine, at least one benzophenone compound as described above, the water-soluble azo initiator The weight ratio of the agent is 1:0.1-10:0.1-10, the organic amine is N,N,N',N'-tetramethylethylenediamine, and the water-soluble azo initiator is 2,2 '-Azobis(2-amidinopropane) dihydrochloride. Using the composition in this preferred embodiment as an initiator can further improve the polymerization efficiency.

[0031] According to a preferred embodiment of the present invention, the composition consists of the above ingredients. Generally, each component in the composition of the present invention is stored independently and added to the polymerization reaction system separately when used.

[0032]The method for preparing an acrylamide copolymer provided by the present invention comprises: under photopolymerization conditions, in the pr...

Embodiment 1

[0060] This example is used to illustrate the method for preparing an acrylamide copolymer using the benzophenone compound of the present invention as an initiator.

[0061] Add 1,500 grams of acrylamide, 75 grams of 2-acrylamido-2-methylpropanesulfonic acid, and 6,300 grams of deionized water into the polymerization bottle. While stirring, control the solution temperature at 0°C, and add sodium hydroxide to adjust the pH to 7. . Add 1.575 mg of water-soluble benzophenone compound 1, 1.575 mg of N,N,N',N'-tetramethylethylenediamine, 1.575 mg of water-soluble azo initiator 2,2'-azobis(2 -Amidinopropane) dihydrochloride, through high-purity nitrogen deoxygenation 0.5h, control the oxygen content in the solution to be less than 1mg / L. A photopolymerization reaction (100W ultraviolet light irradiation) was carried out for a reaction time of 5 hours to obtain a polymer gel. The rubber block is granulated into small rubber particles of 4-6 mm by a granulator. The obtained small m...

Embodiment 2

[0063] This example is used to illustrate the method for preparing an acrylamide copolymer using the benzophenone compound of the present invention as an initiator.

[0064]Add 250 grams of acrylamide, 750 grams of 2-acrylamido-2-methylpropanesulfonic acid, and 2333.33 grams of deionized water into the polymerization bottle. While stirring, control the solution temperature to 40°C, and add sodium hydroxide to adjust the pH to 5. . Add 1000 mg water-soluble benzophenone compound 1, 1000 mg N,N,N',N'-tetramethylethylenediamine, 1000 mg water-soluble azo initiator 2,2'-azobis(2 -amidino propane) dihydrochloride, the oxygen content in the control solution is less than 1mg / L. The photopolymerization reaction (1000W ultraviolet light irradiation) was carried out, and the reaction time was 6 hours to obtain polymer gel blocks. The rubber block is granulated into small rubber particles of 4-6 mm by a granulator. Knead and contact the obtained small micelle with 57.08 grams of sodiu...

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Abstract

The invention relates to the field of petrochemical industry, and discloses a composition capable of initiating a polymerization reaction, and an acrylamide copolymer preparation method, wherein the composition contains an organic amine and at least a compound represented by a formula I, and a weight ratio of the organic amine to the compound is 1:0.0001-10000. The present invention further discloses the acrylamide copolymer preparation method, which comprises that a monomer mixture is subjected to a polymerization reaction in water in the presence of an initiator, wherein the initiator is provided by the composition of the present invention. According to the present invention, by using a benzophenone-based compound as the initiator, the high polymerization reaction efficiency (the viscosity-average molecular weight of the acrylamide copolymer is high) can be obtained at the low initiation temperature. The formula I is defined in the specification.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a composition with the function of initiating polymerization and a method for preparing an acrylamide copolymer. Background technique [0002] During the oil flooding process of conventional oil reservoirs, high molecular weight partially hydrolyzed polyacrylamide can realize the entanglement state between molecular chains at a relatively low concentration, with remarkable viscosity increasing effect, good chemical stability and high viscosity retention rate, which can be sustained Reduce the water-oil mobility ratio, increase the swept volume, reduce the oil saturation of the swept reservoir, and increase the recovery rate. Therefore, it is a kind of polymer product widely used in oil field tertiary oil recovery. With the production of recoverable reserves of conventional oil reservoirs, the reservoir conditions for replacement reserves are becoming more and more severe, re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F226/10C08F226/02C08F2/48C08F8/12C09K8/588
CPCC08F2/48C08F8/12C08F220/56C08F220/58C09K8/588C08F220/585C08F226/10C08F226/02
Inventor 伊卓方昭胡晓娜杜超张文龙祝纶宇刘希
Owner CHINA PETROLEUM & CHEM CORP