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Acrylamide copolymer, preparation method and application thereof

An acrylamide copolymer and acrylamide copolymerization technology, which is applied in the application field of acrylamide copolymer, can solve the problems of small molecular weight of the product, cumbersome process operation, and restrictions on the application of polymers, and achieve high molecular weight, good water solubility, and low residue The effect of low body mass

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

Examples

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preparation example Construction

[0038] The present invention also provides a method for preparing an acrylamide copolymer, the preparation 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 monomer E, monomer F and monomer G, the monomer E is a monomer having a structure shown in formula (8), and the monomer F is a monomer having a structure shown in formula (9)-(12) At least one of the monomers of the structure, the monomer G is a monomer having a structure shown in formula (13), and the weight ratio of the monomer E, the monomer F and the monomer G is The weight ratio 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 are such that after the polymerization reaction, the obtained The viscosity-average molecular weight of the polymer is 30 million-38 million, preferably 32 million-35 mi...

Embodiment 1

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

[0084] Add 1000 grams of acrylamide (AM), 10 grams of 2-acrylamido-2-methylpropanesulfonic acid and 10 grams of surface active functional monomer (M) of structure shown in formula (15) in the beaker 3 ’ for Na, R 14 ’ for -CH 2 (CH 2 ) 10 CH 3 , according to the literature: Daily Chemical Industry, 2006, 36 (6): 345-350, the same below), 4080 grams of deionized water, under stirring, use frozen brine to control the solution temperature at 5 ° C, add hydrogen Sodium oxide adjusted the pH to 7. Transfer the monomer solution to a polymerization bottle, add 10.2 mg of water-soluble azo initiator 2,2'-azobis(2-amidinopropane) dihydrochloride and 10.2 mg of amine N,N,N', For N'-tetramethylethylenediamine, deoxygenate with high-purity nitrogen gas for 0.5 hour, add 10.2 mg of sodium bisulfite and 10.2 mg of ammonium persulfate, continue nitrogen gas ...

Embodiment 2

[0088] This example is used to illustrate the preparation method of the acrylamide copolymer provided by the present invention.

[0089] Add 1000 grams of acrylamide (AM), 1000 grams of 2-acrylamido-2-methylpropanesulfonic acid and 100 grams of surface active functional monomer (M) of structure shown in formula (15) in the beaker 3 ’ for Na, R 14 ’ for -CH 2 (CH 2 ) 10 CH 3), 4900 grams of deionized water, under stirring, control the solution temperature 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 grams of water-soluble azo initiator 2,2'-azobis(2-amidinopropane) dihydrochloride and 1.05 grams of amines N,N,N', For N'-tetramethylethylenediamine, deoxygenate with high-purity nitrogen for 0.5 hour, add 1.05 grams of sodium bisulfite and 1.05 grams of ammonium persulfate, and continue to pass nitrogen until the thermocouple in the polymerization bottle starts to heat up, and t...

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Abstract

The invention discloses an acrylamide copolymer, 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 has the structural unit shown in a formula (1), the structural unit B is at least one of the structural units shown in the formula (2)-the formula (5), the structural unit C is the structural unit shown in the formula (6), the weight ratio of the structural unit A to the structural unit B to 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, especially under high temperature and high salt condition, apparent viscosity of the solution is greatly increased, and the acrylamide copolymer can be used as an oil displacement agent of tertiary recovery of high-temperature high salt oil reservoir.

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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IPC IPC(8): C08F220/56C08F228/02C08F226/10C08F220/54C08F220/04C08F226/02C09K8/588
Inventor 伊卓赵方园林蔚然刘希杜超祝纶宇张文龙方昭
Owner CHINA PETROLEUM & CHEM CORP
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