Amphiphilic block inner quaternary ammonium salt as well as preparation method and application thereof

An amphiphilic block, quaternary ammonium technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of easy shearing and degradation of macromolecular chains, poor polymer solubility, easy adsorption in rock formations, etc. , to achieve the effect of good solution viscosity reduction, good water solubility and soluble biodegradability

Active Publication Date: 2013-08-14
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By increasing the content of hydrophobic groups on the polymer chain or increasing the molecular weight, it can resist the effects of high temperature and high salinity to a certain extent, but it may also lead to poor solubility of the polymer, a substantial increase in dissolution time, and easy shearing of the macromolecular chain. Problems such as degradation and easy adsorption to rock formations

Method used

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  • Amphiphilic block inner quaternary ammonium salt as well as preparation method and application thereof
  • Amphiphilic block inner quaternary ammonium salt as well as preparation method and application thereof
  • Amphiphilic block inner quaternary ammonium salt as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Add 100.00g tertiary acrylate monomer shown in formula II in the reaction vessel 10g 1g Mix 0.2g of catalyst cuprous iodide, 100g of distilled water and 50g of toluene; adjust the pH value of the reaction system to 7 with NaOH solution, feed high-purity nitrogen into the solution system, adjust the temperature of the system to 5°C, and add the initiator α- 1 g of ethyl 2-bromopropionate was subjected to atom transfer radical polymerization for 2 hours; the obtained polymer gel was dialyzed with a dialysis membrane, dried and pulverized to obtain a powder product, ie oil displacing agent 1#.

[0051] The resulting product is confirmed by infrared spectrum, the results are as follows: 1650cm -1 C=C stretching vibration peak at 3000cm -1 The obvious olefin characteristic peaks such as the olefin C-H stretching vibration peak at 1115cm -1The asymmetric stretching vibration peak of C-O-C appears at 3200em -1 The N-H stretching vibration of the ammonium salt ion appea...

Embodiment 2

[0054] According to the steps of Example 1, only the The mass of is replaced by 15g, The mass of the distilled water was replaced with 1.5g, the mass of distilled water was replaced with 150g, the system temperature was replaced with 10°C, and the reaction time was replaced with 4 hours to obtain the product, that is, oil displacement agent 2#.

[0055] The obtained product is confirmed by infrared spectrogram, and the results are as follows: 1650cm -1 C=C stretching vibration peak at 3000cm -1 The obvious olefin characteristic peaks such as the olefin C-H stretching vibration peak at 1115cm -1 The asymmetric stretching vibration peak of C-O-C appears at 3200cm -1 The N-H stretching vibration of the ammonium salt ion appeared at 1055cm -1 The S=O stretching vibration of the sulfonate appeared at the place, so it can be concluded that the polymerization occurred and the internal salt was formed.

[0056] R 1 and R 2 Both are C 8 h 17 , m is 5, and the quantitative an...

Embodiment 3

[0058] According to the steps of Example 1, only the quality of distilled water is replaced by 200g, the quality of initiator is replaced by 2g, the consumption of catalyst cuprous iodide is replaced by 0.6g, the system temperature is replaced by 20°C, and the reaction time is replaced by 5 hours, The product, ie oil displacing agent 3#, was obtained.

[0059] The obtained product is confirmed by infrared spectrogram, and the results are as follows: 1650cm -1 C=C stretching vibration peak at 3000cm -1 The obvious olefin characteristic peaks such as the olefin C-H stretching vibration peak at 1115cm -1 The asymmetric stretching vibration peak of C-O-C appears at 3200cm -1 The N-H stretching vibration of the ammonium salt ion appeared at 1055cm -1 The S=O stretching vibration of the sulfonate appeared at the place, so it can be concluded that the polymerization occurred and the internal salt was formed.

[0060] R 1 and R 2 Both are C 8 h 17 , m is 5, and the quantitativ...

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PUM

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Abstract

The invention discloses amphiphilic block inner quaternary ammonium salt as well as a preparation method and an application thereof. The structural general formula of the inner salt is represented by the formula I. By an atom transferring free radical polymerization method, a polymer containing a tertiary amine radical is led into a molecule containing an acid radical, so that the same molecule contains the acid radical and the alkaline radical at the same time, and the acid radical and the alkaline radical can be combined to form the inner quaternary ammonium salt. The inner salt has the characteristics of high efficiency, low toxicity, high solubility and high biodegradability and also has the characteristics of temperature resistance, shearing resistance, hypersalinity resistance and high water solubility; at the high temperature and the hypersalinity, the inner salt still has an extremely good solution viscosity reducing effect; and the amphiphilic block inner quaternary ammonium salt can well emulsify and solubilize crude oil and can be widely applied to the field of petrochemical engineering, particularly used as an oil expelling agent for tertiary oil recovery in an oil field.

Description

technical field [0001] The invention relates to an amphiphilic block quaternary ammonium inner salt, a preparation method and application thereof. Background technique [0002] Reservoir temperature, salinity of formation water and injected water directly affect the ability of polymer solution to increase viscosity and reduce permeability. For partially hydrolyzed polyacrylamide, although it has obvious viscosity-increasing effect in fresh water, with the increase of oilfield temperature, formation water or injection water salinity, the hydrodynamic radius of polymer macromolecules decreases, and at the same time, the polymerization The increase of the adsorption amount of substances on the rock surface also reduces the effective concentration of the solution, resulting in a continuous decrease in the viscosity of the solution. Amphiphilic water-soluble polymers are an important class of water-soluble polymers. By introducing a small amount of hydrophobic groups into the hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F220/34C08F220/58C08F220/28C09K8/588
Inventor 王金本于林林史学峰徐晓慧杨惠于怀清
Owner INST OF CHEM CHINESE ACAD OF SCI
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