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Asymmetric succinic acid ester type Gemini surfactant and preparation method thereof

A technology for surfactants and succinates, which is applied in the preparation of sulfonates, chemical instruments and methods, organic chemistry, etc., can solve the problems of high production cost, limited application and market promotion, and difficulty in realizing large-scale industrial production, etc. To achieve the effect of simple preparation process, low price and wide range of sources

Inactive Publication Date: 2015-10-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis route of asymmetric Gemini surfactants is relatively complicated, and the high production cost also restricts its application and market promotion to a certain extent, making it difficult to realize large-scale industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 32.7 parts by mass of fatty acid monoethanolamide and 25.74 parts by mass of dodecyl alcohol succinic acid monoester, add them to a three-necked flask, add 1.5 parts by mass of boric acid as a catalyst, heat up to 90°C, and react for 6.5 hours;

[0026] Cool down to 85°C, add sodium bisulfite, and react for 2 hours;

[0027] Add chloroacetic acid, react for 3 hours, and adjust the pH to 7 during the reaction;

[0028] Washing with absolute ethanol, filtering and drying to obtain an asymmetric succinate-type Gemini surfactant.

Embodiment 2

[0030] Take 28.5 parts by mass of fatty acid monoethanolamide and 28.6 parts by mass of dodecyl alcohol succinic acid monoester, add them into a three-necked flask, add 1 part by mass of boric acid as a catalyst, heat up to 105°C, and react for 5.5 hours;

[0031] Cool down to 85°C, add sodium bisulfite, and react for 2.5 hours;

[0032] Add chloroacetic acid, react for 2.5 hours, and adjust the pH to 7 during the reaction;

[0033] Washing with absolute ethanol, filtering and drying to obtain an asymmetric succinate-type Gemini surfactant.

Embodiment 3

[0035] Take 32.7 parts by mass of fatty acid monoethanolamide and 25.74 parts by mass of dodecyl alcohol succinic acid monoester, add them to a three-necked flask, add 1.5 parts by mass of boric acid as a catalyst, heat up to 90°C, and react for 6.5 hours;

[0036] Cool down to 85°C, add sodium bisulfite, and react for 2 hours;

[0037] Add chloroacetic acid, react for 3 hours, and adjust the pH to 7 during the reaction;

[0038] Washing with absolute ethanol, filtering and drying to obtain an asymmetric succinate-type Gemini surfactant.

[0039] Unsymmetrical succinate type Gemini surfactant (C 12 -C 12 ) The first step reaction infrared NMR data is as follows:

[0040] 3444.24 cm -1 is the absorption peak of amide hydrogen; 2854.25cm -1 and 2924.39cm -1 The absorption peak at -CH 3 and -CH 2 The stretching vibration absorption peak of -; 1593 cm -1 is the amide absorption peak; 2667.83 cm -1 with 1732.63 cm -1 Ester carbonyl characteristic absorption peak appears;...

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Abstract

The invention relates to an asymmetric succinic acid ester type Gemini surfactant and a preparation method thereof. The Gemini surfactant comprises two hydrophilic groups and two hydrophobic chains. Compared with a traditional single-head (hydrophilic group) and single-tail (hydrophobic group) surfactant, the performance is more excellent, and the surfactant is a novel efficient surfactant. Fatty monoethanol amide and lauryl alcohol succinate monoester are taken, and boric acid is added for performing a catalyst temperature raising reaction; cooling is performed, and sodium bisulfite is added for a reaction; chloroacetic acid is added for a reaction; the asymmetric succinic acid ester type Gemini surfactant is prepared through washing, filtering and drying. The asymmetric succinic acid ester type Gemini surfactant is based on natural fatty acid which is low in price and easy to obtain. The prepared surfactant has the excellent performance of a traditional Gemini surfactant and further has good market applicability because of the characteristics that the preparing process is simple, and raw materials are low in price.

Description

technical field [0001] The invention relates to a preparation method of a surfactant, in particular to an asymmetric succinate type Gemini surfactant and a preparation method thereof. Background technique [0002] Gemini surfactant contains two hydrophilic groups and two hydrophobic chains. Compared with traditional single-head (hydrophilic) and single-tail (hydrophobic) surfactants, it shows better performance and is a new type of high-efficiency of surfactants. Compared with traditional surfactants, Gemini surfactants show more excellent performance: it is easier to adsorb on the gas / liquid surface, thereby reducing the surface tension of aqueous solution more effectively; it is easier to aggregate to form micelles; Gemini surfactants reduce the concentration of aqueous solutions The tendency of surface tension is much greater than the tendency of aggregation to form micelles, and the efficiency of reducing the surface tension of aqueous solution is quite prominent; it h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/22B01F17/28B01F17/10C07C303/32C07C309/17C09K23/22C09K23/10C09K23/28
Inventor 吕斌王泓棣马建中高建静
Owner SHAANXI UNIV OF SCI & TECH
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