Oil-displacing agent of ligand type gemini surfactant as well as preparation method and application of oil-displacing agent

A Gemini surface and active agent technology, which is applied in the preparation of organic compounds, carboxylic acid amide preparation, cyanide reaction preparation, 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: 2020-07-31
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] In the first step, polyacid anhydride is dissolved in 5 times the mass solvent in a reaction vessel at normal temperature, polyacid anhydride is selected from ethylenediaminetetraacetic anhydride of industrial grade purity, and solvent is selected from industrial grade benzene;

[0032] In the second step, add a long-chain fatty alcohol to the reaction vessel under stirring, and stir evenly. The long-chain fatty alcohol is selected from n-decyl alcohol of industrial grade purity; the molar ratio of the long-chain fatty alcohol to the polyacid anhydride is 2:1;

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

[0034] The fourth step is to filter the precipitate produced in the upper system, wash it with the solvent used in the first step, and dry it at 80 ° C. The quality of the solvent is 5 times that of the polyanhydride;

[0035] In the fifth step, the above-mentione...

Embodiment 2

[0040] In the first step, the polyacid anhydride is dissolved in a solvent with 8 times the mass in a reaction vessel at normal 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 into the reaction vessel under stirring, and stir evenly. The long-chain fatty alcohol is chemically pure n-hexadecanol; the molar ratio of long-chain fatty alcohol to polyacid anhydride 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] The fourth step is to filter the precipitate produced in the upper system, wash with the solvent used in the first step, and dry at 100°C; the quality of the washing liquid is 4 times that of the polyanhydride;

[0044] In the fifth step, the above-mentioned product is dissolved in an alcohol solution ...

Embodiment 3

[0049] In the first step, the polyacid anhydride is dissolved in a solvent of 10 times the mass in a reaction vessel at normal 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 long-chain fatty alcohol is analytically pure n-stearyl alcohol; the ratio of long-chain fatty alcohol to the amount of polyacid anhydride substance 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] The fourth step is to filter the precipitate generated in the upper system, wash with the solvent used in the first step, and dry at 100 ° C; the quality of the washing liquid is 1 times the mass of the polyanhydride;

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

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PUM

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Abstract

The invention discloses an oil-displacing agent of a ligand type gemini surfactant as well as a preparation method and application of the oil-displacing agent, and belongs to the technical field of oil-displacing agents of surfactants. The oil-displacing agent of the ligand type gemini surfactant is prepared from one or more of di-high carbon alcohol ester of ethylenediamine tetraacetic acid, di-high carbon alcohol ester of 1, 2-cyclohexanediamine tetraacetic acid, amide of high carbon amine of ethylenediamine tetraacetic acid and di-high carbon alcohol ester of 1, 2-cyclohexanediamine tetraacetic acid. The preparation method comprises the following steps: 1) dissolving a polyanhydride in a solvent at normal temperature, and adding a long-chain fatty alcohol or a long-chain fatty amine; 2)reacting a reaction solution at 30-120 DEG C for 2-10 h, and 3) filtering, washing and drying a precipitate to obtain a reaction product. The oil-displacing agent can solve the problems of reduced solubility and reduced surface and interface activity caused by high content of calcium and magnesium ions when an oil displacing agent of an existing surfactant is used in an 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 displacement agent of gemini surfactant is also called the oil displacement agent of Gemini surfactant. It is an oil displacement agent with two hydrophilic groups and two hydrophobic groups. Its surface activity is higher than that of single alkane chain and single hydrophilic group. The oil displacing agent of the common surfactant of base composition is much higher, and its application is also more and more extensive. In the field of oil field production, surfactant oil displacement agents are used as foaming agents, emulsifiers, oil displacement agents, etc., and play an important role. Among them, in the field of oil displacement agents, surfactant oil displacement agents have become an important...

Claims

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Application Information

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Patent Type & Authority Applications(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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