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Redox initiator system, acrylamide polymer and preparation method and application of acrylamide polymer

A technology of acrylamide and initiator, applied in redox initiator system and acrylamide polymer and its preparation and application field, can solve the problems such as difficult to obtain polyacrylamide, achieve excellent temperature resistance and salt resistance, initial initiation The effect of low temperature and high activity

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to obtain polyacrylamide with higher molecular weight by the polymerization of acrylamide using the existing initiator system, and more importantly, the polymerization of acrylamide by using the existing initiator system cannot obtain Polyacrylamide with high apparent viscosity in water with high salinity

Method used

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  • Redox initiator system, acrylamide polymer and preparation method and application of acrylamide polymer
  • Redox initiator system, acrylamide polymer and preparation method and application of acrylamide polymer
  • Redox initiator system, acrylamide polymer and preparation method and application of acrylamide polymer

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preparation example Construction

[0032] The present invention also provides a method for preparing an acrylamide polymer, which includes polymerizing acrylamide and a temperature-resistant and salt-resistant monomer in water in the presence of an initiator and an inorganic base, wherein the initiator contains the The redox initiator system provided by the invention.

[0033] The acrylamide polymer in the present invention refers to a polymer obtained by reacting acrylamide with a temperature-resistant and salt-resistant monomer under copolymerization conditions, including a structural unit formed by acrylamide and a temperature-resistant and salt-resistant monomer. structural unit.

[0034] According to the preparation method of the acrylamide polymer of the present invention, the redox initiator system provided by the present invention can be used to carry out the polymerization reaction at a low initial initiation temperature, so that the local temperature rise caused by the exothermic polymerization can be...

Embodiment 1

[0069] This example is used to illustrate the redox initiator system and acrylamide polymer and its preparation method according to the present invention.

[0070] Put 23.75 kg of acrylamide and 26.25 kg of 2-acrylamido-2-methylpropanesulfonic acid into a polymerization reactor with a surface thermocouple, add 128.35 kg of deionized water, and stir until completely dissolved. Slowly add 20 kilograms of sodium hydroxide solution with a mass concentration of 25%, and 1.0 kilograms of 2,2'-azo(2-amidinopropane) dihydrochloride aqueous solution with a mass concentration of 0.05%, 5 grams of formula I The compound PD-1 (see Table 1 for the specific structure), the pH of the system was 7.0, and after 30 minutes of deoxygenation with nitrogen, the temperature of the reaction solution was lowered to 4°C. Add 5.0 kilograms of sodium bisulfite solution with a mass concentration of 0.05%, and 5.0 kilograms of ammonium persulfate aqueous solution with a mass concentration of 0.1%. After 1...

Embodiment 2

[0072] This example is used to illustrate the redox initiator system and acrylamide polymer and its preparation method according to the present invention.

[0073] Put 23.75 kg of acrylamide and 26.25 kg of 2-acrylamido-2-methylpropanesulfonic acid into a polymerization reactor with a surface thermocouple, add 128.35 kg of deionized water, and stir until completely dissolved. Slowly add 20 kilograms of sodium hydroxide solution with a mass concentration of 25%, and 1.0 kilograms of 2,2'-azo(2-amidinopropane) dihydrochloride aqueous solution with a mass concentration of 0.05%, 5 grams of formula I The compound PD-2 (see Table 1 for the specific structure), the pH of the system was 7.0, and after 30 minutes of deoxygenation with nitrogen, the temperature of the reaction solution was lowered to 4°C. Add 5.0 kilograms of sodium bisulfite solution with a mass concentration of 0.05%, and 5.0 kilograms of an aqueous solution of ammonium persulfate with a mass concentration of 0.1%. A...

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Abstract

The invention provides a redox initiator system which comprises persulfates and sulfites. The redox initiator system also comprises compounds shown in the formula I, wherein in the formula I, R is one of H, linear or branched alkyl with carbon atom number being 1-5, amino-alkyl with carbon atom number being 1-5 and NH2. The invention also provides an acrylamide polymer and a preparation method and application thereof. The initial initiation temperature of the redox initiator system provided by the invention is low, and the acrylamide polymer which has high molecular weight and has high apparent viscosity in a solution can be obtained.

Description

technical field [0001] The invention relates to a redox initiator system, an acrylamide polymer, a preparation method and application thereof. More specifically, the present invention relates to a redox radical polymerization initiator system, a method for preparing an acrylamide polymer using the redox radical polymerization initiator system, an acrylamide polymer prepared by the method and applications thereof . Background technique [0002] In recent years, with the increasing difficulty of oil field exploitation, the polymer oil displacement agent represented by polyacrylamide solution has excellent performance in the tertiary oil recovery of the first and second oil reservoirs in the oil field, and has played a role in the stable and increased production of the oil field. important role. As the recoverable reserves of Type I and II reservoirs gradually decrease, Type III reservoirs (referring to the temperature of 80-95°C and salinity of 1×10 4 mg / L oil reservoir) is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/40C08F220/58C08F220/56C08F226/10C09K8/588
Inventor 伊卓黄凤兴计文希魏小林赵方园祝纶宇林蔚然李勇杜凯刘晓光刘希
Owner CHINA PETROLEUM & CHEM CORP
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