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Long-chain cationic gemini surfactant and preparation method thereof

A gemini surface and cationic technology, which is applied in the preparation of carboxylic acid amides, chemical instruments and methods, and the preparation of organic compounds, etc., can solve problems such as the impact of gemini surfactant application, complicated separation and purification process, and corrosion of production equipment, and reduce the Synthetic cost, increase reaction conversion rate, and reduce the effect of equipment corrosion

Active Publication Date: 2016-08-17
XIAN JIBANG NEW AGROCHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reaction has the following defects: firstly, when the reaction needs to prepare the tertiary amine hydrochloride intermediate, hydrogen chloride gas is passed into the tertiary amine, and the hydrogen chloride gas will cause great corrosion to the production equipment
In order to improve the reaction yield, the excess of epichlorohydrin or tertiary amine is usually used. This method not only leads to waste of materials, but also must obtain gemini surfactant products through separation and purification. The subsequent separation and purification process is complicated. In addition, epichlorohydrin It is a toxic substance, if a large amount of residues will have a negative impact on the application of the finished quaternary ammonium cationic gemini surfactant

Method used

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  • Long-chain cationic gemini surfactant and preparation method thereof
  • Long-chain cationic gemini surfactant and preparation method thereof
  • Long-chain cationic gemini surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The long-chain cationic gemini surfactant E18-3-3(OH)-3-E18 has the following molecular structure:

[0055]

[0056] Its preparation method is:

[0057] Oleamidopropyldimethylamine (40mmol, 14.96g), epichlorohydrin (20mmol, 1.85g), potassium hydroxide (or sodium hydroxide) 0.15-0.20g were placed in a reaction flask, and reacted at 80°C for 6h, Added ethanol to wash, and after drying, 14.65 g of the product was obtained with a yield of 90.9%. After MS, 1 The H NMR identification product was consistent with the molecular structure of the target compound.

[0058] When Cl in the above molecular structure is replaced by Br, the epichlorohydrin in the preparation method is changed to epibromohydrin.

Embodiment 2

[0060] The long-chain cationic gemini surfactant E18-2-3(OH)-2-E18 has the following molecular structure:

[0061]

[0062] Its preparation method is:

[0063]Oleamide ethyl dimethylamine (40mmol, 14.48g), epichlorohydrin (20mmol, 1.85g), potassium hydroxide (or sodium hydroxide) 0.15-0.20g were placed in a reaction flask, and reacted at 70°C for 5h, Added ethanol to wash, and after drying, 14.19 g of the product was obtained with a yield of 91.2%. After MS, 1 The H NMR identification product was consistent with the molecular structure of the target compound.

[0064] When Cl in the above molecular structure is replaced by Br, the epichlorohydrin in the preparation method is changed to epibromohydrin.

Embodiment 3

[0066] Long-chain cationic gemini surfactant E22-3-3(OH)-3-E22 has the following molecular structure:

[0067]

[0068] Its preparation method is:

[0069] Erucic acid amidopropyl dimethylamine (40mmol, 16.88g), epichlorohydrin (20mmol, 1.85g), potassium hydroxide (or sodium hydroxide) 0.15-0.20g were placed in a reaction flask, and reacted at 90°C for 8h, Added ethanol to wash, and after drying, 16.31 g of the product was obtained with a yield of 90.4%. After MS, 1 The H NMR identification product was consistent with the molecular structure of the target compound.

[0070] When Cl in the above molecular structure is replaced by Br, the epichlorohydrin in the preparation method is changed to epibromohydrin.

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Abstract

The invention relates to a long-chain cationic gemini surfactant and a preparation method thereof. In the preparation of the existing gemini surfactant, when preparing the tertiary amine hydrochloride intermediate, hydrogen chloride gas is introduced into the tertiary amine, which causes equipment corrosion, and the existence of residual solvent will reduce the rheological properties of the gemini surfactant. The present invention uses epichlorohydrin and fatty amide ethyl / propylene / butyldimethylamine as raw materials, and prepares a series of saturated and unsaturated cations with 2-hydroxy-1, 3-propylene as a linking group Gemini surfactant, the molecular structure contains easily biodegradable amide bonds and easily hydrolyzed hydroxyl groups, and the hydrophobic chain is composed of saturated or unsaturated long-chain fatty acid alkyl chains. The preparation method of the present invention adopts epihalohydrin and a long-chain tertiary amine to obtain the final product through one-step reaction under the condition of solvent-free basic catalysis, which improves the reaction yield, simplifies the reaction process and shortens the reaction period. Industrial scale production.

Description

technical field [0001] The invention relates to a surfactant, in particular to a long-chain cationic gemini surfactant and a preparation method thereof. Background technique [0002] As an important class of fine chemicals, surfactants are widely used in various fields of production and life. Especially gemini surfactant, because its molecule is composed of two hydrophobic chains, two hydrophilic groups and a spacer group, it breaks the structure of traditional surfactant single hydrophobic group and single hydrophilic group, and fundamentally overcomes the traditional single ion Due to the charge repulsion between ionic head groups or hydration, the separation tendency of type surfactants promotes their close arrangement at the interface or in molecular aggregates, making them have lower critical micelle concentration (CMC) and higher Excellent surface activity and unique rheological properties, various advantages make gemini surfactants in tertiary oil recovery, fracturin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/12C07C233/38B01F17/18B01F17/22C09K23/18C09K23/22
Inventor 杨晓武秋列维刘娟萍李培枝王钊陈洪伟董斌刘晨迪
Owner XIAN JIBANG NEW AGROCHEM IND
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