Acrylamide monomer, preparation method therefor, acrylamide polymer and application thereof

A technology of acrylamide and polymer, applied in the field of acrylamide monomer and its preparation, can solve problems such as poor tolerance, troublesome construction, increased loss, etc., achieve excellent temperature and salt resistance and shear resistance, and improve Effects of hydrolysis resistance and salt resistance improvement

Inactive 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

However, the related research "High Temperature Hydrolysis of Water-Soluble AM / AA / AMPS Copolymer" (Zhu Linyong, Applied Chemistry, 2000, 17, 2) also found that under the high temperature condition of 90°C, molecules adjacent to the acrylic acid (AA) unit Internal catalysis, the AMPS unit also undergoes hydrolysis reaction, and the proportion of acrylic acid structural units in the copolymer increases, which improves its temperature sensitivity and salt sensitivity performance, thus limiting the application of this type of polymer under high temperature and high salt conditions above the hydrolysis temperature
Hydrophobic associating polymers use molecular structure to make their viscosity thicker at room temperature, but their on-site preparation requires the use of fresh water or heating to induce dissolution, which brings troubles to construction. In addition, such polymers are also prone to clogging formations , the disadvantage of poor tolerance under high temperature and high salt conditions (Wang Zhonghua, Fine and Specialty Chemicals, 2006, 14, 24)
Zwitterionic copolymers have the unique salt-thickness properties of amphoteric polyelectrolytes, but because of the positive charges in their structure, there is adsorption with the negative charges on the surface of the formation, which increases the loss

Method used

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  • Acrylamide monomer, preparation method therefor, acrylamide polymer and application thereof
  • Acrylamide monomer, preparation method therefor, acrylamide polymer and application thereof
  • Acrylamide monomer, preparation method therefor, acrylamide polymer and application thereof

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preparation example Construction

[0022] The present invention also provides a method for preparing an acrylamide monomer, wherein the method comprises: under the condition of a temperature ranging from -5°C to 30°C, monomers with structures represented by formula (2), formula (3 ) The monomer of the structure shown in ) reacts with the sulfonating agent for 2-16 hours,

[0023]

[0024] Among them, R 1 is hydrogen or C1-C4 alkyl, M 1 is hydrogen, potassium or sodium.

[0025] In the present invention, in order to obtain high-yield acrylamide monomers with the structure shown in formula (1), preferably, among the monomers with the structure shown in formula (2), M 1 Is hydrogen or sodium, more preferably, M 1 is hydrogen, that is, the monomer of the structure shown in the formula (2) is styrenesulfonic acid; in the monomer of the structure shown in the formula (3), R 1 is hydrogen or methyl, more preferably, R 1 is hydrogen, that is, the monomer of the structure shown in the formula (3) is acrylonitril...

Embodiment 1

[0059] This example is used to illustrate the acrylamide temperature-resistant and salt-resistant monomer provided by the present invention and its preparation method

[0060] Add 530 kg of acrylonitrile into a temperature-controlled glass reactor, and slowly add 100 kg of concentrated sulfuric acid with a concentration of 98% by weight to the acrylonitrile under stirring, and cool the mixed solution to -5°C. After stirring evenly, slowly Add 118.2 kg of styrenesulfonic acid to keep the temperature of the reaction system below 5°C. After reacting for 2 hours, an appropriate amount of water was added, and the reaction was continued for 2 hours at room temperature. Still, there are crystals precipitated. After filtering, washing and drying, the pure monomer is obtained, and the product yield is 91.5%.

Embodiment 2

[0062] This example is used to illustrate the temperature-resistant and salt-resistant acrylamide monomer provided by the present invention and its preparation method.

[0063] Add 1060 kg of acrylonitrile into the temperature-controlled glass reactor, and slowly add 117.6 kg of concentrated sulfuric acid with a concentration of 98% by weight to the acrylonitrile under stirring, cool the mixture to 5°C, stir well, and slowly add 118.2 kilograms of styrenesulfonic acid, keeping the temperature of the reaction system below 10°C. After reacting for 4 hours, an appropriate amount of water was added, and the reaction was continued for 4 hours at room temperature. Still, there are crystals precipitated. After filtering, washing and drying, the pure monomer is obtained, and the product yield is 93%.

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Abstract

The invention discloses an acrylamide monomer, a preparation method therefor, an acrylamide polymer and an application thereof. The monomer has a structure represented by a formula (1) shown in the description, wherein R1 is H or C1-C4 alkyl, and M1 and M2 each is hydrogen, potassium or sodium independently. The acrylamide monomer provided by the invention has good polymerizability, and the acrylamide polymer obtained through self-polymerization or copolymerization with other monomers has relatively high molecular weight and excellent heat resistance, salt resistance and shear resistance and 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 monomer and a preparation method thereof, as well as an acrylamide polymer formed from the acrylamide monomer and the application of the acrylamide polymer in polymer oil displacement agents. 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. As the main polymer oil displacement agent, water-soluble 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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/51C07C303/02C08F20/58C09K8/588
Inventor 伊卓方昭张文龙林蔚然祝纶宇杜超刘希
Owner CHINA PETROLEUM & CHEM CORP
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