A kind of p-toluenesulfonate group gemini quaternary ammonium salt and preparation method thereof

Abstract

The invention relates to a p-toluenesulfonate-group Gemini quaternary ammonium salt and a preparation method thereof. The preparation method comprises the following steps: adding long-chain alkyl tertiary amine and isopropanol into a container, heating, and dropwisely adding hydrochloric acid; after the dropwise addition, stirring uniformly, dropwisely adding epoxy chloropropane into the container, and reacting to obtain the hydroxypropyl Gemini quaternary ammonium salt; and adding the hydroxypropyl Gemini quaternary ammonium salt and paratoluensulfonyl chloride into a solvent, stirring uniformly, dropwisely adding a NaOH solution while stirring until the reaction is completed, stopping stirring, and heating to obtain the p-toluenesulfonate-group Gemini quaternary ammonium salt. The p-toluenesulfonate-group Gemini quaternary ammonium salt simultaneously has two hydrophilic quaternary ammonium salt groups; and the plane structure of the p-toluenesulfonate-group benzene ring in the linking group, the lone electron pair of heteroatoms in the sulfonate group and the metal surface can easily form a coordinate bond, so that the molecules form a film on the iron pipe wall, thereby facilitating the corrosion inhibition effect on the steel pipeline. The sulfonate group can not be easily hydrolyzed and decomposed in water, and thus, can not further pollute the water body.

Description

technical field

[0001] The invention relates to a preparation method of a gemini quaternary ammonium salt, in particular to a p-toluenesulfonate group gemini quaternary ammonium salt and a preparation method thereof. Background technique

[0002] Gemini surfactant is a new type of surfactant that connects two traditional surfactant molecules by chemical bonds at or near the head group through a special linking group.

[0003] Ester-based gemini surfactants are easily hydrolyzed into non-surface active fragments due to the ester group structure in the hydrophobic chain, and have good biodegradability and excellent surface activity. Therefore, it is a good chemical intermediate and a surfactant with good performance.

[0004] Chinese patent CN 104262182 A mixes a halogenated carboxylic acid or a halogenated acetyl halide and a long-carbon chain alcohol in a certain proportion under solvent-free conditions, and reacts to obtain an α-halogenated carboxylic acid ester. Then mix...

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