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Gemini surfactant and preparation method thereof

A Gemini surface and active agent technology, applied in the field of surfactants and their preparation, can solve problems such as difficult to meet low temperature conditions, achieve the effects of avoiding side reactions, easier adsorption, and guaranteed conversion rate

Active Publication Date: 2013-10-23
ADANA FOOD TECH LIUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under normal circumstances, sucrose ester mono-based surfactants have good water solubility, but sometimes it is difficult to meet some low temperature conditions in the industry. Therefore, surfactants with good surface activity under low temperature conditions will have broad development prospects

Method used

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  • Gemini surfactant and preparation method thereof
  • Gemini surfactant and preparation method thereof
  • Gemini surfactant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A, put maleic anhydride and methanol into a reaction vessel, add concentrated sulfuric acid as a catalyst, reflux and mix at 100°C for 3 hours, then distill under reduced pressure to obtain dimethyl maleate; the mole of maleic anhydride and methanol Ratio is 1:3, and the add-on of described vitriol oil is 2% of maleic anhydride and methanol gross mass;

[0024] B, introduce sucrose stearate, add KOH as catalyzer, first react 1 hour at 100 DEG C, then be warming up to 120 DEG C and react 2 hours, then underpressure distillation obtains sucrose distearate maleate, namely The gemini surfactant; the molar ratio of the sucrose stearate to maleic anhydride is 2:1, and the addition of the KOH is 1% of the total mass of maleic anhydride and methanol.

Embodiment 2

[0026] A, put maleic anhydride and methanol into a reaction vessel, add concentrated sulfuric acid as a catalyst, reflux and mix at 105°C for 4 hours, then distill under reduced pressure to obtain dimethyl maleate; the mole of maleic anhydride and methanol Ratio is 1:3, and the add-on of described vitriol oil is 2% of maleic anhydride and methanol gross mass;

[0027] B, introduce sucrose stearate, add NaOH as catalyzer, react 2 hours at 105 DEG C earlier, then be warming up to 125 DEG C and reflux mix 3 hours, then underpressure distillation obtains sucrose distearate maleate, That is, the gemini surfactant; the molar ratio of the fatty acid sucrose ester to maleic anhydride is 2:1, and the amount of NaOH added is 2% of the total mass of maleic anhydride and methanol.

Embodiment 3

[0029] A, put maleic anhydride and methanol into a reaction vessel, add concentrated sulfuric acid as a catalyst, reflux and mix at 100°C for 3 hours, then distill under reduced pressure to obtain dimethyl maleate; the mole of maleic anhydride and methanol Ratio is 1:3, and the add-on of described vitriol oil is 2% of maleic anhydride and methanol gross mass;

[0030] B. Introduce sucrose laurate, add KOH as a catalyst, first react at 100°C for 1 hour, then heat up to 120°C for 2 hours, and then distill under reduced pressure to obtain sucrose maleate dilaurate, which is the Gemini Surfactant; the molar ratio of the sucrose laurate and maleic anhydride is 2:1, and the addition of the KOH is 1% of the total mass of maleic anhydride and methanol.

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Abstract

The invention discloses a gemini surfactant and a preparation method thereof. The preparation method comprises following steps: adding maleic anhydride and methanol in a mol ratio of 1:3 of maleic anhydride to methanol in a reaction device, where the mixture has catalytic reactions in the presence of catalysts to obtain dimethyl maleate; then mixing dimethyl maleate with fatty acid sucrose ester in a ratio of 1:2 of dimethyl maleate to fatty acid sucrose ester , dimethyl maleate and fatty acid sucrose ester have catalytic reactions in the presence of catalysts so as to obtain malelic sucrose aliphatic diester. The gemini surfactant has a dimerization surface activity structure, and has the advantages of good low temperature solubility and compounding property and excellent surface activity.

Description

technical field [0001] The invention relates to a surfactant and a preparation method thereof, in particular to a gemini surfactant and a preparation method thereof. Background technique [0002] Gemini surfactants are a new class of surfactants composed of a spacer group that connects two hydrophobic groups and two hydrophilic groups with ionic head groups through chemical bonds. Compared with traditional single-base surfactants, gemini surfactants have the advantages of lower critical micelle concentration, lower surface tension of aqueous solution or interfacial tension between water and oil, and better water solubility. [0003] The sugar ester-based surfactant product is safe, pollution-free, non-toxic to the human body, does not irritate the skin and mucous membranes, and is biodegradable. It is a green surfactant. At present, most of the sucrose ester-based surfactants on the market are single-based surfactants. The synthesis process is relatively mature, the industr...

Claims

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Application Information

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IPC IPC(8): B01F17/00C07H13/06C07H1/00C09K23/00
Inventor 贺健常志东吴国勇
Owner ADANA FOOD TECH LIUZHOU
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