Acrylamide copolymer, as well as preparation method and application thereof

An acrylamide copolymer, acrylamide copolymerization technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of cumbersome process operation, limited use of polymers, low molecular weight of products, etc. The effect of apparent viscosity, excellent anti-oxidation performance and high molecular weight

Active Publication Date: 2015-05-20
CHINA PETROLEUM & CHEM CORP +1
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  • 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 the traditional polyacrylamide, but the former The molecular weight of the obtained binary copolymer of the method is no more than 20 million, and the latter method first needs to synthesize the active polyurethane macromonomer terminated by hydroxyethyl acrylate, and its process operation is relatively loaded down with trivial details, and the molecular weight of the obtained product is low, so that the polymer limited use

Method used

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

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preparation example Construction

[0029] The present invention also provides a method for preparing an acrylamide copolymer, the method comprising: polymerizing a monomer mixture in the presence of an initiator and an inorganic basic compound under solution polymerization conditions; wherein the monomer The body mixture contains the monomer of the structure represented by the formula (5), the monomer of the structure represented by the formula (6) and the monomer of the structure represented by the formula (7); and the monomer of the structure represented by the formula (5), the formula ( 6) The mass ratio of the monomer of the structure shown and the monomer of the structure shown by formula (7) is 1:0.001-3:0.0001-0.5, preferably 1:0.01-1.5:0.001-0.2; the solution polymerization reaction The conditions are such that the viscosity-average molecular weight of the polymer obtained after the polymerization reaction is 28 million-35 million, preferably 32 million-33.5 million,

[0030]

[0031] where R 1 ', R...

Embodiment 1

[0071] This example serves to illustrate the acrylamide copolymer according to the present invention and its preparation method.

[0072] Add 1000 kg of acrylamide, 10 kg of 2-acrylamido-2-methylpropanesulfonic acid, 1 kg of 3-acrylamidophenylboronic acid, 4044 kg of deionized water to the batching kettle, and control with frozen brine under stirring The temperature of the solution was -7°C, and the pH was adjusted to 6 by adding sodium hydroxide. Pump the monomer solution into the polymerization kettle, add 10.11 g of 2,2'-azodiisobutylamidine hydrochloride and 10.11 g of N,N,N',N'-tetramethylethylenediamine, pass high Pure nitrogen was deoxygenated for 0.5 hours, 10.11 grams of sodium bisulfite and 10.11 grams of ammonium persulfate were added, and nitrogen was continued until the thermocouple in the polymerization kettle began to heat up, and the reaction time was 10 hours to obtain an acrylamide copolymer (acrylamide / 2-propylene). Sodium amido-2-methylpropanesulfonate / 3-a...

Embodiment 2

[0076] This example serves to illustrate the acrylamide copolymer according to the present invention and its preparation method.

[0077] Add 1000 kg of acrylamide, 1000 kg of 2-acrylamido-2-methylpropanesulfonic acid, 100 kg of 3-acrylamido phenylboronic acid, and 4900 kg of deionized water to the batching kettle, and control with frozen brine under stirring. The solution temperature was 15°C, and the pH was adjusted to 9 by adding sodium hydroxide. Pump the monomer solution into the polymerization kettle, add 1050 grams of 2,2'-azodiisobutylamidine hydrochloride and 1050 grams of N,N,N',N'-tetramethylethylenediamine, pass high Pure nitrogen was deoxygenated for 0.5 hours, 1050 grams of sodium bisulfite and 1050 grams of ammonium persulfate were added, and nitrogen was continued until the thermocouple in the polymerization kettle began to heat up. The reaction time was 2 hours to obtain an acrylamide copolymer (acrylamide / 2-propylene). Sodium amido-2-methylpropanesulfonate / 3...

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Abstract

The invention discloses an acrylamide copolymer, as well as a preparation method and an application thereof. The acrylamide copolymer comprises a structural unit as shown in a formula (1), a structural unit as shown in a formula (2) and a structural unit as shown in a formula (3) in a mass ratio of 1:(0.001-3):(0.0001-0.5), preferably 1:(0.01-1.5):(0.001-0.2); and the viscosity-average molecular weight of the acrylamide copolymer is 28-35 millions. The acrylamide copolymer has high apparent viscosity and oxidation resistance, and can be used for achieving an excellent oil dispelling effect.

Description

technical field [0001] The present invention relates to an acrylamide copolymer and its preparation method and application. 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. 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 oil reservoirs make the application of HPAM face many difficulties, which are mainly reflected in the combination ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F2/10C08F8/12C09K8/588
Inventor 伊卓赵方园刘希张文龙林蔚然方昭祝纶宇杜超
Owner CHINA PETROLEUM & CHEM CORP
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