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A kind of acrylamide copolymer and its preparation method and application

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 good water solubility. , the effect of high molecular weight

Active Publication Date: 2018-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of acrylamide copolymer and its preparation method and application
  • A kind of acrylamide copolymer and its preparation method and application
  • A kind of acrylamide copolymer and its preparation method and application

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preparation example Construction

[0038] 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 30 million-38 million, preferably 33 million-36 million,

[0039]

[0040] where ...

Embodiment 1

[0082] This example is used to illustrate the preparation method of the acrylamide copolymer provided by the present invention.

[0083] 1000 g of acrylamide (AM), 10 g of 2-acrylamido-2-methylpropanesulfonic acid and 10 g of N-(4-butylbenzene) maleamic acid (in formula (15), R 13 ' is hydrogen, R 14 ' is hydrogen, R 15 ' is n-propyl, according to literature: Polymer, 1992, 38 (19): the preparation method in 4184-4190 is obtained, the following is the same), 4080 grams of deionized water, under stirring, use frozen brine to control solution temperature 5 ℃ , and sodium hydroxide was added to adjust the 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 ...

Embodiment 2

[0085] This example is used to illustrate the preparation method of the acrylamide copolymer provided by the present invention.

[0086] Add 1000 grams of acrylamide (AM), 1000 grams of 2-acrylamido-2-methylpropanesulfonic acid and 100 grams of N-(4-butylbenzene)maleamic acid, 4900 grams of deionized water to a beaker, Under stirring, the temperature of the solution was controlled to 15°C with frozen brine, and the pH was adjusted to 7 by adding sodium hydroxide. 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, 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 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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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/58C08F222/38C08F226/10C08F8/12C09K8/588
Inventor 伊卓杜超刘希方昭张文龙林蔚然祝纶宇
Owner CHINA PETROLEUM & CHEM CORP
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