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

A technology of acrylamide and polymer, applied in the application of polymer oil displacement agent, acrylamide polymer, acrylamide monomer and its preparation field, can solve the problems of poor tolerance, troublesome construction, increased loss, etc. Achieve excellent temperature and salt resistance and shear resistance, and improve the effect of salt resistance

Inactive Publication Date: 2018-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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preparation example Construction

[0020] The method for preparing acrylamide monomers provided by the present invention comprises: reacting diisobutylene, acrylonitrile and a sulfonating agent represented by formula (II) for 2-16 hours at a temperature ranging from -5°C to 30°C ( Thereby obtaining the acrylamide monomer shown in formula (I),

[0021]

[0022] According to the present invention, there is no special requirement to the kind of sulfonating agent, and various sulfonating agents in the prior art can realize the object of the present invention, considering that the sulfonating agent with strong acidity and strong oxidizing property can improve the yield of reaction rate, preferably, the sulfonating agent is sulfuric acid or oleum with a concentration of 95-102% by weight.

[0023] According to the present invention, in order to obtain acrylamide monomers in high yields, preferably, the reaction includes two stages carried out in sequence: the first stage is that the sulfur contacting agent with a...

Embodiment 1

[0054] This example is used to illustrate the acrylamide monomer and acrylamide copolymer provided by the present invention and the preparation method thereof.

[0055] (1) Preparation of acrylamide monomer

[0056] Add 530 grams of acrylonitrile into a temperature-controlled glass reactor, and slowly add 100 grams 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 72 grams of diisobutene to keep the temperature of the reaction system below 5°C. After reacting for 2 hours, an appropriate amount (0.064 mL) of water was added, and the reaction was continued for 2 hours at 25°C. After standing still, crystals precipitated. After filtering, washing and drying, the pure monomer was obtained and weighed to obtain a product yield of 93.8%.

[0057] (2) Preparation of acrylamide copolymer

[0058] In the reactor, add 1000 grams of acrylamide (14.069mol), 7.9...

Embodiment 2

[0060] This example is used to illustrate the acrylamide monomer and acrylamide copolymer provided by the present invention and the preparation method thereof.

[0061] (1) Preparation of acrylamide monomer

[0062] Add 1060 grams of acrylonitrile into the temperature-controlled glass reactor, and slowly add 117.6 grams of concentrated sulfuric acid with a concentration of 98% by weight to the acrylonitrile under stirring, cool the mixed solution to 5°C, and after stirring evenly, slowly add 72 grams of diisobutylene, maintaining the temperature of the reaction system below 10°C. After reacting for 4 hours, an appropriate amount (6.4 mL) of water was added, and the reaction was continued at 20° C. for 4 hours. After standing still, crystals precipitated. After filtering, washing and drying, the pure monomer was obtained and weighed to obtain a product yield of 92.0%.

[0063] (2) Preparation of acrylamide copolymer

[0064] In the reactor, add 1108.85 grams of AM (15.6mol)...

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Abstract

The invention relates to the field of petrochemical industry, and discloses an acrylamide monomer, a preparation method and an acrylamide polymer thereof, and an application of the acrylamide polymer.The monomer has a structure represented by formula (I), and M1 in the formula (I) is hydrogen, potassium or sodium. The preparation method of the acrylamide monomer is characterized in that diisobutylene and acrylonitrile react with a sulfonating agent at a temperature of -5-30 DEG C for 2-16 h. The invention also discloses the acrylamide polymer prepared from the acrylamide monomer and / or through the method, and the application of the acrylamide polymer in a polymer oil displacement agent. The acrylamide monomer has excellent polymerizability, and the acrylamide polymer obtained by self-polymerizing the acrylamide monomer or copolymerizing the acrylamide monomer and other monomers has the advantages of high molecular weight, excellent temperature and salt resistance and excellent shear resistance, and can be used as a high-temperature and high-salt reservoir tertiary oil displacement agent.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to an acrylamide monomer and a preparation method thereof, and an acrylamide polymer formed from the acrylamide monomer and the acrylamide polymer in a polymer oil displacement agent in the application. Background technique [0002] Polymer flooding mainly injects a certain scale of polymer solution, increases the viscosity of the displacement fluid, reduces the permeability of the water phase of the oil layer to reduce the mobility ratio, and adjusts the water absorption profile to achieve the purpose of increasing the volume of the displacement phase, thereby increasing the recovery rate. yield. 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. Wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/15C07C303/32C07C303/20C09K8/588C08F220/56C08F220/58
CPCC07C303/20C07C303/32C07C309/15C08F220/56C09K8/588C08F220/585
Inventor 伊卓张明森胡晓娜张文龙祝纶宇刘希方昭杜超
Owner CHINA PETROLEUM & CHEM CORP
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