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Styrene compound and acrylamide copolymer and preparation method and application thereof

A technology of acrylamide copolymer and acrylamide copolymerization, applied in chemical instruments and methods, drilling compositions, organic chemistry, etc., can solve problems such as poor salt resistance, and achieve strong temperature and salt resistance, good water solubility , the effect of high thermal stability

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relatively speaking, due to the advantages of wide source, cheap price, good solubility and viscosification, the proportion of the former used in the enhanced oil recovery greatly exceeds that of biopolymers, but acrylamide polymers, in the face of oil reservoir environment Harsh, such as high temperature and high salinity conditions, easy to degrade, thermal stability, poor salt resistance, at this time have to use a large amount of biopolymers

Method used

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  • Styrene compound and acrylamide copolymer and preparation method and application thereof
  • Styrene compound and acrylamide copolymer and preparation method and application thereof
  • Styrene compound and acrylamide copolymer and preparation method and application thereof

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preparation example Construction

[0026] The preparation method of the above-mentioned styrene compounds provided by the present invention may comprise: mixing the lactam shown in formula II and / or its salt with an alkali agent, and contacting the obtained mixture with vinylbenzyl chloride shown in formula III reaction, and then selectively in the presence of an alkylating agent, the product obtained by the contact reaction is alkylated,

[0027] (m=1 or 2, preferably m=1)

[0028] Wherein, the salt of the lactam shown in formula II may be a salt of various lactams common in the art, including but not limited to hydrochloride, sulfate and acetate. Vinylbenzyl chloride represented by formula III may be at least one of p-vinylbenzyl chloride, m-vinylbenzyl chloride and o-vinylbenzyl chloride, preferably p-vinylbenzyl chloride.

[0029] In the present invention, there is no special requirement on the amount of lactam represented by formula II and / or its salt, alkali agent, vinylbenzyl chloride and alkylating...

preparation Embodiment 1

[0067] Dissolve 11.4g of α-aminovalerolactam in 100m of anhydrous tetrahydrofuran, add 2.4g of sodium metal, react for 30 minutes, dissolve 16g of p-vinylbenzyl chloride in 10ml of anhydrous tetrahydrofuran, and add it dropwise to the above solution. The dropwise addition was completed within 30 minutes. After continuing to react for 60 min, remove the solvent by rotary evaporation, add chloroform to dissolve, wash the organic phase with deionized water three times, and add anhydrous potassium carbonate for drying. After drying to remove the solvent, compound 1 was obtained 20g. The chemical composition of the compound measured by X-ray fluorescence spectrometer is: C, 72.98, N, 12.09, O, 6.97 (theoretical values: C, 73.01; N, 12.16; O, 6.95).

[0068] 24.6 g of Compound 1 was dissolved in anhydrous dichloromethane, 15 g of potassium carbonate was added, and 30 g of iodomethane was slowly added dropwise under ice-bath conditions. After 4 hours of dropwise addition, the tem...

preparation Embodiment 2

[0070] Dissolve 23.0g of compound 1 in dimethylformamide, add 15g of anhydrous potassium carbonate, add 100g of bromooctadecane, react at 100°C for 8h, and then stop the reaction. After the solvent and unreacted bromooctadecane were removed under reduced pressure, the product was dissolved in dichloromethane, washed 3 times with distilled water, and then dried by adding anhydrous sodium sulfate. After drying, the desiccant was filtered off and evaporated to remove Compound B was obtained after solvent The chemical composition of the compound measured by X-ray fluorescence spectrometer is: C, 81.70, N, 3.77, O, 2.10 (theoretical values: C, 81.68; N, 3.81; O, 2.18).

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Abstract

The invention relates to the field of petroleum exploitation and discloses a styrene compound having the structure shown as formula I. The invention also discloses an acrylamide copolymer comprising a structural unit provided by the compound shown as the formula I and having intrinsic viscosity of 17-30 dl / g, and a preparation method of the acrylamide copolymer; the method comprises: polymerizing a monomer mixture in an aqueous solution under solution polymerization conditions in the presence of an initiator, wherein the monomer mixture comprises a styrene compound monomer shown as the formula I and an acrylamide monomer, and the content of the acrylamide monomer by total weight of the monomer mixture is 1-99% by weight, and a weight ratio of the styrene compound monomer to the acrylamide monomer is 100:(1-100). The invention also discloses application of the acrylamide copolymer in the preparation of oil-displacing agents. The styrene compound provided herein and acrylamide can be copolymerized to obtain a water-soluble copolymer that has high apparent viscosity under high mineralization degree and temperature.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to a copolymer of styrene compounds and acrylamide suitable for preparing water-soluble copolymers, a preparation method and application thereof. Background technique [0002] As an important component of oilfield chemicals, water-soluble polymers play a very important role in drilling, cementing, acidizing and tertiary oil recovery. Polymer flooding is one of the important methods in tertiary oil recovery technology. It uses the high viscosity and residual resistance coefficient of polymer solution to adjust the water absorption profile and improve the oil-water mobility ratio, so as to achieve the purpose of enhancing oil recovery. Therefore, the polymer aqueous solution is required to have a higher viscosity, and can still maintain a higher value of viscosity under the conditions of high salinity and high temperature. There are two main types of water-soluble polymers used ...

Claims

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Application Information

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IPC IPC(8): C07D211/76C09K8/588C08F220/56C08F212/14C08F220/58
CPCC09K8/588C09K8/882C07D211/76C08F220/56C08F212/14C08F220/585
Inventor 孙汝柳丛林陈静君
Owner CHINA PETROLEUM & CHEM CORP