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Tertiary amine CO2/N2 switch-type Gemini surfactant and synthetic method thereof

A technology of surfactants and synthetic methods, applied in chemical instruments and methods, chemical/physical processes, organic chemistry, etc., can solve the problems of restricting industrial synthesis, difficult to carry out reversible processes, and high synthesis costs

Active Publication Date: 2017-07-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CO 2 / N 2 Switching surfactants commonly include amidinyl surfactants and guanidinium surfactants. Among them, the synthesis cost of the commonly used amidinyl surfactants is relatively high, thus limiting its industrial synthesis, while the guanidinium surfactants The bicarbonate decomposition of the agent requires a higher temperature, and its reversible process is difficult to carry out, which limits its use

Method used

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  • Tertiary amine CO2/N2 switch-type Gemini surfactant and synthetic method thereof
  • Tertiary amine CO2/N2 switch-type Gemini surfactant and synthetic method thereof
  • Tertiary amine CO2/N2 switch-type Gemini surfactant and synthetic method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] A tertiary amine CO 2 / N 2 The synthetic method of switch type Gemini surfactant comprises the following steps:

[0032] (1) Dissolve 0.045mol of ethylenediamine in 20mL of absolute ethanol, heat it in a water bath to 70°C, and then add dropwise an ethanol solution containing 0.1mol of bromododecane to control the amount of bromododecane dissolved in it. The dropwise addition time of the ethanol solution was 1.5h, and stirred for 24h to obtain the reaction solution Ⅰ;

[0033] (2) After the reaction, pour out the reaction solution I while it is hot, cool it at room temperature, filter, wash the filter cake with absolute ethanol for 3 times, and then dry it at 50°C to obtain a white solid powder N,N'- Didodecylethylenediamine;

[0034] (3) Dissolve the solid powder obtained in step (2) in absolute ethanol, heat the oil bath to 80°C, and then add dropwise 0.022mol of N,N-dimethyl-3-chloropropylamine and 0.022mol mol of potassium iodide ethanol solution, control the dr...

Embodiment 2

[0037] A tertiary amine CO 2 / N 2 The synthetic method of switch type Gemini surfactant comprises the following steps:

[0038] (1) Dissolve ethylenediamine in absolute ethanol, heat it in a water bath to 65°C, and then add 0.5 mol of bromododecane-soluble ethanol solution to it to control the dripping of bromododecane-soluble ethanol solution Adding time is 1h, stirring for 20h, to obtain reaction solution I; wherein, the weight volume ratio of ethylenediamine to absolute ethanol is 4:22; the molar ratio of ethylenediamine to bromododecane is 5:18;

[0039](2) After the reaction, pour out the reaction solution I while it is hot, cool it at room temperature, filter, wash the filter cake with absolute ethanol 4 times, and then dry it at 60°C to obtain a white solid powder N,N'- Didodecylethylenediamine;

[0040] (3) Dissolve the solid powder obtained in step (2) in absolute ethanol, heat the oil bath to 75°C, and then add dropwise 0.05mol of N,N-dimethyl-3-chloropropylamine ...

Embodiment 3

[0043] A tertiary amine CO 2 / N 2 The synthetic method of switch type Gemini surfactant comprises the following steps:

[0044] (1) Dissolve ethylenediamine in absolute ethanol, heat it in a water bath to 60°C, then add 0.25 mol of ethanol solution of bromododecane to it, and control the dripping of the ethanol solution of bromododecane Adding time is 2 hours, stirring for 24 hours to obtain reaction liquid I; wherein, the weight volume ratio of ethylenediamine to absolute ethanol is 2:20; the molar ratio of ethylenediamine to bromododecane is 7:19;

[0045] (2) After the reaction, pour out the reaction solution I while it is hot, cool it at room temperature, filter, wash the filter cake with absolute ethanol for 3 times, and then dry it at 62°C to obtain a white solid powder N,N'- Didodecylethylenediamine;

[0046] (3) Dissolve the solid powder obtained in step (2) in absolute ethanol, heat the oil bath to 76°C, and then add dropwise 0.042mol of N,N-dimethyl-3-chloropropyl...

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Abstract

The invention discloses a tertiary amine CO2 / N2 switch-type Gemini surfactant and a synthetic method thereof. The synthetic method comprises the following steps: (1) dissolving ethidene diamine in absolute ethyl alcohol, heating the mixture, then adding an ethanol solution where bromododecane is dissolved, and stirring the mixture to obtain a reaction liquid I; (2) cooling the reaction liquid I and filtering and drying the reaction liquid to obtain solid powder; (3) dissolving solid powder in absolute ethyl alcohol, heating the mixture, then separately dropwise adding ethanol solutions where N,N-dimethyl-3-chloropropylamine and potassium iodide are dissolved into the mixture, and stirring the mixture to obtain a reaction liquid II; and (4) cooling the reaction liquid II, washing and drying the reaction liquid II to obtain a target product, adding the target product into a closed pressure container, adding water, introducing a CO2 to obtain a surfactant, and introducing N2 to convert the surfactant into a non-surfactant. The method disclosed by the invention is simple, and can smoothly convert the surfactant and the non-surfactant, so that the surfactant can be repeatedly used, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, in particular to a tertiary amine CO 2 / N 2 Switch type Gemini surfactant and its synthesis method. Background technique [0002] In recent years, more and more attention has been paid to green chemistry. Traditional surfactants will not participate in the reaction during use, but their separation after use is also quite difficult; therefore, this has caused a waste of resources and a certain degree of environmental damage. [0003] CO 2 / N 2 As a new type of reusable green surfactant, switch-type surfactant controls CO 2 The addition and separation of surfactants can easily realize the mutual transformation between non-surfactant and surfactant, so that the separation of surfactant after use becomes relatively easy, and CO 2 is an inexpensive and readily available raw material, which makes CO 2 The research on switching surfactants is becoming more and more popular. [0004] C...

Claims

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Application Information

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IPC IPC(8): C07C209/08C07C211/14B01F17/16C09K23/16
CPCC07C209/08C09K23/00
Inventor 周明邹佳汐王刚黄洲补军成陈意萍
Owner SOUTHWEST PETROLEUM UNIV
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