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Oil-displacing agent for ligand-type gemini surfactant, preparation method and application thereof

A Gemini surface and active agent technology, which is applied in the preparation of organic compounds, carboxylic acid amides, cyanide reaction, etc., can solve the problems of reduced solubility, reduced surface activity, etc., and achieve improved oil recovery and oil washing rate The effect of improving and not easy to precipitate

Active Publication Date: 2022-08-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of the solubility reduction and surface activity reduction caused by the high content of calcium and magnesium ions when the existing surfactant oil displacement agent is used in the oil field environment, and to provide a ligand-type gemini surfactant. Oil displacement agent, preparation method and application thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The first step, at normal temperature, in the reaction vessel, the polyacid anhydride is dissolved in 5 times the mass solvent, the polyacid anhydride is selected from the ethylenediamine tetraacetic anhydride of technical grade purity, and the solvent is selected from the benzene of technical grade;

[0032] In the second step, add long-chain fatty alcohol to the reaction vessel under stirring, stir evenly, long-chain fatty alcohol is selected from n-decanol of technical grade purity; the ratio of long-chain fatty alcohol to polyanhydride substance is 2:1;

[0033] In the third step, the above-mentioned mixed solution in the reaction vessel was stirred, heated at 60° C. for 8 hours, and cooled to room temperature;

[0034] In the fourth step, the precipitation produced in the upper system is filtered, washed with the solvent used in the first step, and dried at 80°C, and the solvent quality is 5 times the quality of the polyanhydride;

[0035] The 5th step, above-menti...

Embodiment 2

[0040] In the first step, the polyacid anhydride is dissolved in 8 times the mass of solvent in the reaction vessel at room temperature, the polyacid anhydride is chemically pure 1,2-cyclohexanediaminetetraacetic anhydride, and the solvent is chemically pure toluene;

[0041] In the second step, add long-chain fatty alcohol to the reaction vessel under stirring, stir evenly, the long-chain fatty alcohol is chemically pure n-hexadecanol; the ratio of the long-chain fatty alcohol to the polyanhydride substance is 2.2:1;

[0042] In the third step, the above mixed solution in the reaction vessel was stirred, heated at 100° C. for 3 hours, and cooled to room temperature;

[0043] In the fourth step, the precipitate produced in the above system is filtered, washed with the solvent used in the first step, and dried at 100°C; the quality of the washing solution is 4 times the quality of the polyanhydride;

[0044] The 5th step, above-mentioned product is dissolved in the alcohol liqu...

Embodiment 3

[0049] In the first step, the polyacid anhydride is dissolved in 10 times the mass of solvent in the reaction vessel at room temperature, the polyacid anhydride is analytically pure 1,2-cyclohexanediaminetetraacetic anhydride, and the solvent is analytically pure xylene;

[0050] In the second step, add long-chain fatty alcohol to the reaction vessel under stirring, stir evenly, and the long-chain fatty alcohol is analytically pure n-octadecanol; the ratio of the amount of long-chain fatty alcohol to polyanhydride substances is 2.5:1;

[0051] In the third step, the above mixed solution in the reaction vessel was stirred, heated at 30° C. for 10 hours, and cooled to room temperature;

[0052] In the fourth step, the precipitate produced in the above system is filtered, washed with the solvent used in the first step, and dried at 100 °C; the quality of the washing solution is 1 times the quality of the polyanhydride;

[0053] The 5th step, above-mentioned product is dissolved i...

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Abstract

The invention discloses an oil-displacing agent for ligand-type gemini surfactants, a preparation method and applications thereof, and belongs to the technical field of oil-displacing agents for surfactants. An oil-displacing agent for ligand-type gemini surfactants, comprising di-high alcohol esters of ethylenediamine tetraacetic acid, di-high alcohol esters of 1,2-cyclohexanediamine tetraacetic acid, and high alcohol esters of ethylene diamine tetraacetic acid. One or more of the amides of carbon amines and the di-high alcohol esters of 1,2-cyclohexanediaminetetraacetic acid. The preparation method of the present invention includes: 1) at normal temperature, dissolving the polyacid anhydride in a solvent, and adding long-chain fatty alcohol or long-chain fatty amine; 2) reacting the reaction solution at 30-120° C. for 2-10 hours 3) The precipitate is filtered, washed and dried to obtain the reaction product. The invention solves the problems of reduced solubility and reduced surface interface activity caused by high calcium and magnesium ion content when the existing oil-displacing agent of the surfactant is used in the oil field environment.

Description

technical field [0001] The invention relates to the technical field of oil-displacing agents for novel surfactants, in particular to an oil-displacing agent for ligand-type gemini surfactants, a preparation method and applications thereof. Background technique [0002] The oil-displacing agent of Gemini surfactant is also called the oil-displacing agent of Gemini surfactant. It is an oil-displacing agent with two hydrophilic groups and two hydrophobic groups. The oil-displacing agent of the common surfactant based on the composition is much higher, and its application is more and more extensive. In the field of oilfield production, surfactant-based oil-displacing agents are used as foaming agents, emulsifiers, oil-displacing agents, etc., and play an important role. Among them, in the field of oil displacement agents, the oil displacement of surfactants has become an important measure for tertiary oil recovery. Many oilfields at home and abroad use surfactant oil displaceme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C07C229/16C07C227/18C07C237/06C07C231/02E21B43/22
CPCC09K8/584C07C227/18C07C229/16C07C231/02C07C237/06E21B43/16C07C2601/14
Inventor 申坤侯军刚杨剑张育超折利军钟智勇万文杰
Owner PETROCHINA CO LTD
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