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Acrylamide copolymer, preparation method therefor and application of acrylamide copolymer

An acrylamide copolymer and acrylamide copolymerization technology are applied in the application field of acrylamide copolymers, which can solve the problems of polymer application limitation, complicated process operation, small molecular weight of products, etc., and achieve low residual monomer content and preparation method steps. Simple, high molecular weight effect

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 therefor and application of acrylamide copolymer
  • Acrylamide copolymer, preparation method therefor and application of acrylamide copolymer
  • Acrylamide copolymer, preparation method therefor and application of acrylamide copolymer

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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 1: 0.001-10: 0.001-10, more preferably 1: 0.001-3: 0.001-0.5, most preferably 1: 0.01-1: 0.01-0.1; the solution polymerization conditions make the obtained polymer after polymerization The viscosity average molecular weight is 30 million-38 million, preferably 32 million-35 million,

[0039]

[0040]

[0041] Among them, R 1 ’...

preparation example 1

[0098] This preparation example is used to illustrate the preparation method of monomer G.

[0099] (1) Under nitrogen protection, dissolve 3-[tris(trimethylsiloxane)silyl]propylamine in 100 mL of dichloromethane, add iodomethane dropwise at 20°C (wherein, 3-[tri( The molar ratio of trimethylsiloxane (trimethylsiloxane) silyl] propylamine to methyl iodide is 1:2), stirred for 3 hours, and then the obtained reaction solution was spin-dried by rotary evaporation, and reconstituted by dichloromethane / petroleum ether. Crystallization to obtain a mixture containing N,N-dimethyl-3-[tris(trimethylsiloxy)silyl]propylamine;

[0100] (2) Mix and dissolve the mixture containing N,N-dimethyl-3-[tris(trimethylsiloxy)silyl]propylamine obtained in step (1) with allyl chloride in 80 mL of ethanol (wherein, the molar ratio of 3-[tris(trimethylsiloxane)silyl]propylamine to allyl chloride is 1:1.5), stirred at 20°C for 5 hours, and removed the solvent by rotary evaporation after the reaction, a...

Embodiment 1

[0103] This example is used to illustrate the preparation method of the acrylamide copolymer provided by the present invention.

[0104] Add 1000 grams of acrylamide (AM), 10 grams of 2-acrylamido-2-methylpropanesulfonic acid, 10 grams of monomer G prepared in Preparation Example 1, and 4080 grams of deionized water into a beaker, and stir. The temperature of the solution was controlled at 5°C with frozen saline, and the pH was adjusted to 7 by adding sodium hydroxide. 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 flow until the thermocouple in the polymerization bottle starts to heat up, and the reaction time is 8 hours. The colloid is taken out and granulated into 4-6 ...

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Abstract

The invention discloses an acrylamide copolymer, a preparation method therefor and an application of the acrylamide copolymer. The acrylamide copolymer contains a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A is a unit with a structure represented by a formula (1) shown in the description, the structural unit B is at least one of units with structures represented by formulae (2 to 5) shown in the description, the structural unit C is a unit with a structure represented by a formula (6) shown in the description, the weight ratio of the structural unit A to the structural unit B to the structural unit C is 1 to (0.001 to 10) to (0.001 to 10), and the viscosity average molecular weight of the acrylamide copolymer is 30,000,000 to 38,000,000. The acrylamide copolymer disclosed by the invention has the characteristics of good water solubility, low residual monomer content and high molecular weight; and particularly, under high-temperature and high-salt conditions, the apparent viscosity of a solution of the acrylamide copolymer is improved greatly compared with that of the conventional polyacrylamide, so that the acrylamide copolymer can serve as an oil displacement agent for tertiary oil recovery of high-temperature and high-salt oil reservoirs.

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): C08F220/56C08F220/58C08F230/08C08F220/54C08F226/10C09K8/588
Inventor 伊卓黄凤兴林蔚然杜超祝纶宇张文龙方昭刘希
Owner CHINA PETROLEUM & CHEM CORP