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Alkynyl quaternary ammonium salt multifunctional surfactants and preparation method thereof

The technology of surfactant and quaternary ammonium salt is applied in the field of oilfield production stimulation and multifunctional surfactant, which can solve the problems of water pollution and eutrophication of water source, and achieve the effect of increasing corrosion inhibition performance and good corrosion inhibition performance.

Inactive Publication Date: 2016-12-07
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These compounds lead to water pollution or eutrophication of water sources

Method used

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  • Alkynyl quaternary ammonium salt multifunctional surfactants and preparation method thereof
  • Alkynyl quaternary ammonium salt multifunctional surfactants and preparation method thereof
  • Alkynyl quaternary ammonium salt multifunctional surfactants and preparation method thereof

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Effect test

Embodiment 1

[0032] The preparation of embodiment 1 butyl alkynyl quaternary ammonium salt surfactant C4

[0033] (1) 1-bromobutane (4.2g, 30mmol), diethanolamine (4.73g, 45mmol), anhydrous potassium carbonate (8.29g, 60mmol) and potassium iodide (1.0g) were added in a 250mL two-necked bottle, and 80mL of acetonitrile was added, Nitrogen was passed for 5 minutes to replace the air in the system, and then refluxed for 12 hours.

[0034] (2) Stop the reaction, remove acetonitrile by rotary evaporation, add 60 mL of dichloromethane and 60 mL of water, and separate the layers. The organic phase was washed twice with water in order to remove excess diethanolamine. The product has certain solubility in water, and after washing with water, the aqueous phase is extracted twice with dichloromethane. The organic phase was separated and dried over anhydrous sodium sulfate.

[0035] (3) The dichloromethane was removed by rotary evaporation to obtain 3.23 g of light yellow liquid with a yield of 66....

Embodiment 2

[0038] (6) Dichloromethane:methanol=10:1, the pure product C4 was obtained by silica gel column chromatography as light yellow oily liquid, which was used for subsequent tests. The preparation of embodiment 2 benzyl alkynyl quaternary ammonium salt surfactant Bz

[0039] (1) Add benzyl chloride (1.90g, 15mmol), diethanolamine (2.4g, 23mmol), anhydrous potassium carbonate (4.28g, 30mmol) and potassium iodide (0.5g) into a 250mL two-necked bottle, add 80mL of acetonitrile, and blow nitrogen for 5 Minutes, replace the air in the system, and then reflux for 12h.

[0040] (2) Stop the reaction, remove acetonitrile by rotary evaporation, add 30 mL of dichloromethane and 30 mL of water, and separate the layers. The organic phase was washed twice with water in order to remove excess diethanolamine. The product has certain solubility in water, and after washing with water, the aqueous phase is extracted twice with dichloromethane. The organic phase was separated and dried over anhyd...

Embodiment 3

[0044] The preparation of embodiment 3 n-octyl alkynyl quaternary ammonium salt surfactant C8

[0045] (1) n-octyl bromide (6.0g, 30mmol), diethanolamine (4.73g, 45mmol), anhydrous potassium carbonate (8.29g, 60mmol) and potassium iodide (1.0g) were added in a 250mL two-necked bottle, and 80mL of acetonitrile was added, and the Nitrogen for 5 minutes to replace the air in the system, and then reflux for 12 hours.

[0046](2) Stop the reaction, remove acetonitrile by rotary evaporation, add 60 mL of dichloromethane and 60 mL of water, and separate the layers. The organic phase was washed twice with water in order to remove excess diethanolamine. The product has certain solubility in water, and after washing with water, the aqueous phase is extracted twice with dichloromethane. The organic phase was separated and dried over anhydrous sodium sulfate.

[0047] (3) Dichloromethane was removed by rotary evaporation to obtain 5.00 g of light yellow liquid with a yield of 76.7%. T...

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Abstract

The invention discloses a series of alkynyl quaternary ammonium salt multifunctional surfactants and a preparation method thereof. A structural formula of quaternary ammonium salt is shown in the description, wherein R represents a C4-C22 linear, branched or cycloalkyl, aryl or alkenyl group. The preparation method comprises the following steps: (1) carrying out alkylation on ethanol amine under alkaline and acetonitrile reflux conditions by virtue of bromo-hydrocarbon; and (2) carrying out further alkylation on tertiary amine under an ethanol reflux condition by virtue of propargyl bromide, so as to obtain alkynyl quaternary ammonium salt, namely reddish brown semitransparent viscous liquid or solid. The alkynyl quaternary ammonium salt multifunctional surfactants have very high surface activity, good corrosion resistance and excellent viscoelasticity, the preparation method is simple and feasible, the raw material cost is low, the operation is easy, the yield is high, and the surfactants are environmentally friendly.

Description

technical field [0001] The invention relates to the field of multifunctional surfactants, and also to the technical field of oilfield production enhancement and transformation, in particular to a class of alkynyl quaternary ammonium salt multifunctional surfactants and a preparation method thereof. Background technique [0002] Acidizing and fracturing of oil and gas wells is an important measure to realize the efficient development of oil and gas fields, that is, inject acid liquid or thickened acid liquid into the formation through pressure equipment, and use the acid liquid to dissolve the rock to expand the permeation channel of the rock in the oil layer. And dissolve the blockage in the seepage channel or break the rock to form new artificial fractures, so that the oil and gas permeability increases and the channel is unblocked. In order to achieve the purpose of deep and long-distance acidification, the widely used acid liquid system generally contains surfactants, thi...

Claims

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Application Information

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IPC IPC(8): C07C215/40C07C213/00C09K8/74
CPCC07C213/00C07C215/12C07C215/40C09K8/74C09K2208/30
Inventor 刘冬冬姚二冬周福健闫伟宋岩姜振学高之业李卓杨威刘澈李源
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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