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N-substituted acrylamide monomer and preparation method thereof, and acrylamide copolymer and preparation method thereof

A technology of acrylamide copolymer and acrylamide monomer, which is applied to acrylamide copolymer and its preparation, and its preparation, in the field of N-substituted acrylamide monomer, can solve the problem that the temperature resistance and salt resistance of polyacrylamide is difficult to meet high temperature and high temperature. Problems such as the requirements for the use of salt reservoirs

Active Publication Date: 2016-06-15
吉林光亚聚合物化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature and salt resistance of polyacrylamide obtained by copolymerization of existing functional monomers and acrylamide is still difficult to meet the requirements of high-temperature and high-salt oil reservoirs.

Method used

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  • N-substituted acrylamide monomer and preparation method thereof, and acrylamide copolymer and preparation method thereof
  • N-substituted acrylamide monomer and preparation method thereof, and acrylamide copolymer and preparation method thereof
  • N-substituted acrylamide monomer and preparation method thereof, and acrylamide copolymer and preparation method thereof

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preparation example Construction

[0042] The present invention provides a kind of preparation method of N-substituted acrylamide monomer, comprises the following steps:

[0043] The compound of formula (III) is reacted with the compound of formula (IV) to obtain the N-substituted acrylamide monomer having the structure of formula (I);

[0044]

[0045] Among them, R 1 and R 2 are independently selected from alkyl groups; X is halogen.

[0046]In the preparation method provided by the present invention, the N-substituted acrylamide monomer with the structure of the formula (I) can be obtained by directly reacting the compound of the formula (III) and the compound of the formula (IV), and the process is specifically as follows:

[0047] The structural compound of formula (III) and the structural compound of formula (IV) are mixed and reacted in a solvent. Wherein, the structure of the compound of formula (III) is as follows:

[0048]

[0049] In formula (III), X is halogen, preferably Cl, Br or I.

[...

Embodiment 1

[0098] Preparation of N-alkylacrylamide monomers

[0099] Step 1: Preparation of Acryloyl Chloride

[0100] In a four-neck flask equipped with a stirrer, a thermometer, a reflux condenser, and a constant pressure dropping funnel, first add thionyl chloride according to n (acrylic acid): n (thionyl chloride): = 1:1.5, and add a small amount of Polymerization inhibitor hydroquinone, control the system temperature at -5 ~ 5 ° C, slowly add acrylic acid dropwise under stirring conditions, after the dropwise addition, the system is slowly heated to 55 ° C, the reaction appears to reflux, and use sodium hydroxide aqueous solution as the acidic Gas absorption liquid, constant temperature reaction for 3 hours, after the end, the system was slowly cooled to room temperature; the device was changed to vacuum distillation, and a colorless irritating liquid was collected, and the colorless irritating liquid was detected by nuclear magnetic resonance, and its hydrogen spectrum detection re...

Embodiment 2

[0106] Preparation of N-alkylacrylamide monomers

[0107]In a four-neck flask equipped with a stirrer, a thermometer, a reflux condenser, a constant pressure dropping funnel, and a nitrogen protection device, follow n(N,N-dimethyl-p-phenylenediamine): n(dimethylformamide DMF )=1:2, add 102.5g N,N-dimethyl-p-phenylenediamine and 110.03gDMF, then add 15.0g sodium carbonate powder (as an acid-binding agent, react with HCl, one of the products, to promote the forward reaction), Under stirring conditions, the temperature of the system is controlled by an ice-water bath at -5 to 5°C, according to n(N,N-dimethyl-p-phenylenediamine):n(acryloyl chloride)=1:1.5, using a constant pressure dropping funnel to slowly Add dropwise the acryloyl chloride solution composed of 102.21g of the acryloyl chloride liquid prepared in Example 1 and 82.56g of DMF solvent. The molar ratio of the two is 1:1. A crude yellowish N-substituted acrylamide is obtained. The crude product was first washed with ...

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Abstract

The invention belongs to the field of oilfield chemical agents and especially relates to an N-substituted acrylamide monomer and a preparation method thereof, and an acrylamide copolymer and a preparation method thereof. The N-substituted acrylamide monomer has the structure as the formula (I), wherein R1 and R2 are independently selected from alkyl groups. The acrylamide copolymer with the N-substituted acrylamide monomer has excellent temperature and salt resistances and has high viscosity even under high temperature and high salt conditions. A test result proves that the acrylamide copolymer prepared by copolymerizing the N-substituted acrylamide monomer with acrylamide is higher than 40 mPa*s under the high temperature and high salt conditions (test temperature is 85 DEG C, solvent total dissolved solid is 45000 water, total concentration of Ca<2+> and Mg<2+> is 1800 mg / L, and target liquid concentration is 2000 mg / L).

Description

technical field [0001] The invention belongs to the field of oilfield chemicals, and in particular relates to an N-substituted acrylamide monomer, a preparation method thereof, an acrylamide copolymer and a preparation method thereof. Background technique [0002] With the rapid development of the economy, the world's demand for energy, especially oil, continues to increase. Therefore, enhanced crude oil recovery has increasingly become an important part of the business planning of international oil companies. In recent years, the sustained and rapid growth of my country's social economy requires more and more gasoline, but the domestic oil supply is difficult to meet people's growing demand for oil. The dependence on foreign oil has further increased, exceeding 50%. Moreover, the water content of major oil fields in China has been continuously increasing after primary oil recovery (primary oil recovery refers to the use of oil layer energy to extract oil) and secondary oi...

Claims

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Application Information

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IPC IPC(8): C07C233/44C07C231/02C08F220/56C08F220/60C08F8/12
CPCC07C51/60C07C231/02C07C233/44C08F8/12C08F220/56C08F220/60C07C233/14C07C57/66
Inventor 郭拥军毛慧斐蔡术威冯春辉李华兵
Owner 吉林光亚聚合物化工有限公司
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