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Acrylamide copolymer, and preparation method and application thereof

A technology of acrylamide copolymer and acrylamide copolymerization, which is applied in the application field of acrylamide copolymer to achieve the effects of good temperature and salt resistance, high molecular weight and low residual monomer content

Inactive Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The study titled "High Temperature Hydrolysis of Water-Soluble AM / AA / AMPS Copolymer" (Zhu Linyong, Applied Chemistry, 2000, 17, 2) found that at a high temperature of 90 ° C, the intramolecular catalysis of adjacent acrylic acid (AA) units As a result, the hydrolysis of the AMPS unit also undergoes a hydrolysis reaction. Although the proportion of acrylic acid structural units in the copolymer increases with the hydrolysis reaction, which improves its temperature sensitivity and salt sensitivity performance, but because AMPS is prone to hydrolysis at high temperatures, this is limited. Application of polymer-like polymers under high temperature and high salt conditions above hydrolysis temperature

Method used

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  • Acrylamide copolymer, and preparation method and application thereof
  • Acrylamide copolymer, and preparation method and application thereof
  • Acrylamide copolymer, and preparation method and application thereof

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preparation example Construction

[0033] The present invention also provides a method for preparing an acrylamide copolymer, the method comprising: polymerizing a monomer mixture in water under solution polymerization conditions and in the presence of an initiator; wherein the monomer The mixture contains monomers of structure shown in formula (5) and monomers of structure shown in formula (6); based on the total moles of monomers in the monomer mixture, the monomers of structure shown in formula (5) The content of the monomer is 1-99 mole %, the content of the monomer of the structure shown in formula (6) is 1-99 mole %; preferably, the content of the monomer of the structure shown in formula (5) is 80-97.5 mole %, The monomer content of the structure shown in formula (6) is 2.5-20 mol %; The condition of described solution polymerization reaction makes the viscosity average molecular weight of the polymer obtained after the polymerization reaction be 30 million-35.5 million, preferably 31 million-3500 Ten th...

Embodiment 1

[0105] Add 530 kg of acrylonitrile into a temperature-controlled glass reactor, and slowly add 100 kg of concentrated sulfuric acid with a concentration of 98% by weight to the acrylonitrile under stirring, and cool the mixed solution to -5°C. After stirring evenly, slowly Add 118.2 kg of styrenesulfonic acid to keep the temperature of the reaction system below 5°C. After reacting for 2 hours, an appropriate amount of water was added, and the reaction was continued for 2 hours at room temperature, and the pH value of the system was adjusted to 7 with sodium hydroxide, and then stood still, and crystals were precipitated. After filtering, washing and drying, the pure monomer P1 was obtained.

Embodiment 2

[0107]Add 1060 kg of acrylonitrile into the temperature-controlled glass reactor, and slowly add 117.6 kg of concentrated sulfuric acid with a concentration of 98% by weight to the acrylonitrile under stirring, cool the mixture to 5°C, stir well, and slowly add 118.2 kilograms of styrenesulfonic acid, keeping the temperature of the reaction system below 10°C. After reacting for 4 hours, an appropriate amount of water was added, and the reaction was continued for 4 hours at room temperature, and the pH value of the system was adjusted to 7 with potassium hydroxide, and then stood still, and crystals were precipitated. After filtering, washing and drying, the pure monomer P2 was obtained.

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Abstract

The invention discloses an acrylamide copolymer, and a preparation method and an application thereof. The acrylamide copolymer has structural units represented by a formula (1) and structural units represented by a formula (2). As the total mole number of the structural units in the acrylamide copolymer as a reference, the content of the structural units represented by the formula (1) is 1-99mol% and the content of the structural units represented by the formula (2) is 1-99mol%. The viscosity average molecular weight of the acrylamide copolymer is 30-35.5 million. The acrylamide copolymer provided by the invention can resist high temperature, and has a good thickening effect under high mineral degree. The acrylamide copolymer can be widely applied in the field of petrochemical industry, especially as a tertiary recovery oil displacement agent.

Description

technical field [0001] The invention relates to an acrylamide copolymer, a preparation method of the acrylamide copolymer, the acrylamide copolymer prepared by the method and the application of the acrylamide copolymer. Background technique [0002] Polymer flooding mainly injects a certain scale of polymer solution, increases the viscosity of the displacement fluid, and reduces the water phase permeability of the oil layer to reduce the mobility ratio and adjust the water absorption profile to achieve the purpose of increasing the volume of the displacement phase, thereby improving the recovery. Rate. [0003] As the main polymer oil displacement agent, partially hydrolyzed polyacrylamide (HPAM) has been popularized and applied on a large scale in conventional oil reservoir EOB technology, and has played an important role in stabilizing and increasing oilfield production. With the reduction of reserves in conventional oil reservoirs, the application of HPAM in high-tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F8/12C09K8/588
Inventor 伊卓刘希方昭张文龙林蔚然祝纶宇杜超
Owner CHINA PETROLEUM & CHEM CORP
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