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
CN104437235BActive Publication Date: 2016-08-17XIAN JIBANG NEW AGROCHEM IND
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN JIBANG NEW AGROCHEM IND
Publication Date
2016-08-17

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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.
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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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