Propargyl alcohol type quaternary ammonium salt surfactant and preparation method thereof

Abstract

The invention relates to a propargyl alcohol type quaternary ammonium salt surfactant and a preparation method thereof, and the structural formula of quaternary ammonium salt is as follows: n is equal to 8, 10, 12, 14 or 16, and X is Cl or Br; and a substituent is positioned in the ortho-position, interposition or para-position. The preparation method is as follows: (1) adding 3-5g of NaH into a reactor, introducing nitrogen, adding 60-90ml of THF (tetrahydrofuran), stirring at room temperature, dropping 4-6g of propiolic alcohol, further slowly dropping 10-15g of chloromethylpyridine, stirring for 15-30h, separating water phase from organic phase, washing, drying, performing column chromatography, and then getting pyridyl-2-butynol; and (2) adding the pyridyl-2-butynol and alkyl halide into the reactor according to the molar ratio of 1: 1.5-1: 4, further adding 10ml-15ml of acetonitrile, refluxing and stirring for 20-30h at the temperature of 50-80 DEG C, washing, performing the column chromatography, and then getting the alkynol type quaternary ammonium salt surfactant. The series of the propargyl alcohol type quaternary ammonium salt surfactants have very high surface activity and very strong corrosion inhibition performance, the preparation method is simple and feasible, the operation is easy, the yield is higher, and the environmental pollution can be avoided.

Description

technical field [0001] The invention relates to a propargyl alcohol quaternary ammonium salt surfactant, and also relates to a preparation method of the surfactant. Background technique [0002] The harm of metal corrosion is very huge. According to reports, about 10%-20% of the total tonnage of metal produced in the world is completely scrapped due to corrosion, and about 30% of metal equipment is damaged as a result. The loss caused by corrosion of metal machinery and equipment far exceeds the price of the metal itself. Metal corrosion not only wastes materials, but also often causes accidents such as production stoppage, personal safety and environmental pollution. According to relevant experts, one ton of steel is corroded into rust every minute and a half in the world. At present, the corrosion loss caused by chemical or electrochemical reactions between metal materials and the surrounding environment in my country is about 500 billion yuan per year, accounting for abo...

AI Technical Summary

Problems solved by technology

[0006] It has been found in research and application practice that inorganic corrosion inhibitors containing arsenic and chromium are more resistant to high temperatures, but are highly toxic and harmful to the environment; commonly used organic corrosion inhibitors have good corrosion inhibition effects at room temperature, but these inhibitors Most of the corrosion inhibitors are adsorption-type corrosion inhibitors, which are often based on physical adsorption. They are very sensitive to corrosive media and temperature. They are easily detached from the surface of metal materials and decomposed at high temperatures, thus losing their corrosion inhibition function. It is difficult for the corrosion inhibitor to exert its corrosion inhibition effect in the environment above 60°C

At present, there is no corrosion inhibitor or corrosion inhibition system in China that can effectively inhibit the corrosion of steel surfaces under high temperature and high acidity conditions.

Images