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Gemini quaternary surfactant containing pyridine rings and preparing method thereof

A surfactant, gemini quaternary ammonium salt technology, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve the problems of application and promotion limitations, decreased use effect, etc., to achieve high surface activity, strong anti-corrosion ability , the effect of fewer steps

Inactive Publication Date: 2004-12-29
CHINA WEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, monoquaternary ammonium surfactants have exposed their inherent weaknesses, that is, when used for a long time, the use effect will be significantly reduced due to the drug resistance produced by microorganisms, which limits further application and promotion.

Method used

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  • Gemini quaternary surfactant containing pyridine rings and preparing method thereof
  • Gemini quaternary surfactant containing pyridine rings and preparing method thereof
  • Gemini quaternary surfactant containing pyridine rings and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Into a 500ml three-necked flask equipped with a dropping funnel, a nitrogen inlet tube, and a reflux condenser with a drying tube, after first purging with nitrogen, add 100ml of anhydrous ether and 2.45g of lithium (0.35mol), and drop Add 0.2mol of C 10 h 21 A mixture of Br and 40-60ml of anhydrous ether was reacted for about 1 hour to make most of the lithium chips react completely, and the reaction temperature was controlled near the freezing point, and 21g (0.26mol) of pyridine and 50ml of toluene were added dropwise, and after 2 hours of reaction, the temperature was raised To 110°C, reflux for 3 hours. Separation, washing and drying. The low-boiling point compounds were evaporated on a rotary evaporator, and the corresponding fractions were collected by distillation under reduced pressure, and then subjected to column chromatography (eluent: petroleum ether: ethyl acetate = 4:1) to obtain α-decylpyridine.

[0036] Add decylpyridine and 1,4-dibromobutane (or 1,6...

Embodiment 2

[0038] In a 500ml three-necked flask equipped with a dropping funnel, a nitrogen inlet tube, and a reflux condenser with a drying tube, after purging with nitrogen, add 50ml of anhydrous ether and 2.45g of lithium (0.35mol), and start stirring. Add 0.2molC dropwise 12 h 25 The mixture of Br and 50ml of anhydrous ether was reacted for about 2 hours to make most of the lithium chips react completely, and the reaction temperature was controlled at about freezing point, and 0.3mol of pyridine and 60ml of toluene were added dropwise, and after 2 hours of reaction, the temperature was raised to about 110°C. Reflux for 3 hours. Separation, washing and drying. The low-boiling point compounds were evaporated on a rotary evaporator, and the corresponding fractions were collected by distillation under reduced pressure, and then subjected to column chromatography to obtain α-dodecylpyridine.

[0039] In a three-necked flask equipped with a stirrer and a reflux condenser, add dodecylpyr...

Embodiment 3

[0041] Add dodecylpyridine and 1,4-dibromobutane (its molar ratio is 3: 1) synthesized in Example 2 in a three-necked flask equipped with a stirrer and a reflux condenser, and the solvent in the reaction mixture (without The massfraction of water ethanol) is 60%, reflux reaction 20 hours, steams dehydrated alcohol with rotary evaporator, recrystallization, the white solid of drying gained, promptly obtains the gemini quaternary ammonium salt surfactant GP8 that contains pyridine ring.

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PUM

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Abstract

The present invention is one kind of quaternary ammonium salt surfactant containing pyridine ring and its preparation process. The preparation process includes: adding bromoalkane and metal lithium into anhydrous ethyl ether and reaction for 0.5-2 hr at temperature controlled near the freezing point; maintaining the temperature and adding excessive pyridine and toluene solution to react for 0.5-3 hr, raising temperature and reflux for hours; mixing alkyl pyridine and haloalkane dibromide in the ratio of 1-4 into alcohol solvent for reflux reaction for 15-72 hr; and re-crystallizing the product and drying. The surfactant of the present invention has very high surface activity, high sterilizing effect, high corrosion resistance, simple preparation process, mild reaction condition and other advantages.

Description

technical field [0001] The invention relates to a class of nitrogen-containing heterocyclic gemini quaternary ammonium salt surfactants and a preparation method thereof. Background technique [0002] 1. Application of surfactants in tertiary oil recovery [0003] Crude oil is a non-renewable resource, and conventional oil recovery technology can only recover 1 / 3 of crude oil reserves. The oil crisis in the 1970s gave birth to the growth of tertiary oil recovery. Among them, ASP flooding is a new technology for tertiary oil recovery developed in the 1980s. Surfactants play an important role in this process. Surfactants used in tertiary oil recovery must meet the following conditions: (1) High surface activity at the oil / water interface, and the oil-water interfacial tension is reduced to (0.01-0.001)×10 -5 Below N / cm. It has a certain solubility and reduces the adsorption amount of rock to crude oil; (2) the adsorption amount on the rock surface is small; (3) there should...

Claims

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Application Information

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IPC IPC(8): C09K23/18
Inventor 蒋晓慧周丽梅胡星琪
Owner CHINA WEST NORMAL UNIVERSITY
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