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Acrylamide copolymer and preparation method and application thereof

An acrylamide copolymer and acrylamide copolymerization technology, applied in the application field of acrylamide copolymer, can solve the problems of cumbersome process operation, polymer application limitation, small molecular weight of the product, etc., and achieve good water solubility and low residual monomer content , the effect of high molecular weight

Active 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 polymers obtained by the above two methods have their own characteristics, and some properties such as temperature resistance, salt resistance, shear resistance and surface activity are indeed improved compared with traditional polyacrylamide, but the process operation is relatively It is cumbersome, and the molecular weight of the obtained product is small (no more than 20 million), which limits the application of polymers

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

[0039] The present invention also provides a preparation method of an acrylamide copolymer, the preparation method comprising: under solution polymerization reaction conditions, in the presence of an initiator, a monomer mixture is polymerized in water, wherein the monomer is The mixture contains monomer E, monomer F and monomer G, the monomer E is a monomer with the structure represented by formula (8), and the monomer F is represented by formula (9)-(12) At least one of the monomers of the structure, the monomer G is a monomer with the structure represented by formula (13), and the weight ratio of the monomer E, the monomer F and the monomer G is 1: 0.001-10: 0.001-10, more preferably 1: 0.01-1.5: 0.01-0.2, most preferably 1: 0.01-1: 0.01-0.1; the solution polymerization reaction conditions make the polymer obtained after the polymerization reaction The viscosity average molecular weight is 29 million-38 million, preferably 31 million-34 million,

[0040]

[0041] where ...

Embodiment 1

[0083] This example is used to illustrate the preparation method of the acrylamide copolymer provided by the present invention.

[0084] 1000 grams of acrylamide (AM), 10 grams of 2-acrylamido-2-methylpropanesulfonic acid and 10 grams of monomer G (n' is 10, R 13 ' for -CH 2 (CH 2 ) 10 CH 3 , according to the literature: Modern Chemical Industry, 2010, 30(3): The preparation method in 57-60 is obtained, the following is the same), 4080 grams of deionized water, under stirring, control the temperature of the solution with frozen brine to 5 ° C, add hydrogen Sodium adjusts pH to 7. Transfer the monomer solution to a polymerization bottle, add 10.2 mg of the water-soluble azo initiator 2,2'-azobis(2-amidinopropane) dihydrochloride and 10.2 mg of the amine N,N,N', N'-tetramethylethylenediamine, deoxygenate with high-purity nitrogen for 0.5 hours, add 10.2 mg of sodium bisulfite and 10.2 mg of ammonium persulfate, continue to flow nitrogen until the thermocouple in the polymer...

Embodiment 2

[0086] This example is used to illustrate the preparation method of the acrylamide copolymer provided by the present invention.

[0087] Add 1000 grams of acrylamide (AM), 1000 grams of 2-acrylamido-2-methylpropanesulfonic acid and 100 grams of monomer G (n' is 10, R 13 ' for -CH 2 (CH 2 ) 10 CH 3 ), 4900 grams of deionized water, under stirring, control the temperature of the solution to 15°C with frozen brine, and add sodium hydroxide to adjust the pH to 7. Transfer the monomer solution to a polymerization bottle, add 1.05 g of water-soluble azo initiator 2,2'-azobis(2-amidinopropane) dihydrochloride and 1.05 g of amines N,N,N', N'-tetramethylethylenediamine, pass high-purity nitrogen to remove oxygen for 0.5 hours, add 1.05 g of sodium bisulfite and 1.05 g of ammonium persulfate, continue to pass nitrogen until the thermocouple in the polymerization bottle starts to heat up, and the reaction time is 4 hours. The colloid was taken out and granulated into 4-6 mm copolyme...

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Abstract

The invention discloses an acrylamide copolymer and a preparation method and an application thereof. The acrylamide copolymer contains a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A is the shown in a formula (1), the structural unit B is shown from at least of the formula (2)-the formula (5), the structural unit C is shown in the formula (6), the weight ratio of the structural unit A, the structural unit B and the structural unit C is 1: 0.001-10: 0.001-10, and the viscosity-average molecular weight of the acrylamide copolymer 30 million-38 million. The acrylamide copolymer has the characteristics of good water solubility, low residual monomer content, and high molecular weight, under high temperature and high salt condition, compared with the conventional polyacrylamide, the apparent viscosity of a solution is greatly increased, and the acrylamide copolymer can be taken as third oil-extraction oil-displacement agent for high-temperature high-salt oil reservoir.

Description

technical field [0001] The present 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 is mainly by injecting a certain scale of polymer solution, increasing the viscosity of the displacing fluid, reducing the water permeability of the oil layer to reduce the mobility ratio and adjust the water absorption profile, so as to achieve the purpose of increasing the volume of the displacing phase, thereby enhancing the recovery. Rate. [0003] As the main polymer oil displacement agent, partially hydrolyzed polyacrylamide (HPAM) has been widely promoted and applied in the tertiary oil recovery (EOB) technology of conventional reservoirs, and has played an important role in stabilizing and increasing oil production. With the reduction of conventional oil reserves, high-temperature and high-salt o...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C08F222/20C08F220/54C08F226/10C09K8/588
Inventor 伊卓祝纶宇杜超刘希方昭张文龙林蔚然
Owner CHINA PETROLEUM & CHEM CORP
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