Synthesis method of dibutyltin dilaurate

Abstract

The invention discloses a synthesis method of dibutyltin dilaurate. The method comprises steps as follows: 1, a solid mixture of lauric acid and dibutyltin oxide is stirred at the temperature of 20-30 DEG C to be converted into a liquid mixture; 2, the liquid mixture is heated to 60-70 DEG C and then subjected to a reflux reaction for 2-3 h; 3, the liquid mixture subjected to the reflux reaction is cooled to 10-30 DEG C, left to stand for layering and then collected, an organic phase is obtained, anhydrous magnesium sulfate is added to the organic phase for water removal, the mixture is filtered, and obtained filtrate is dibutyltin dilaurate. The solid mixture of lauric acid and dibutyltin oxide is converted into the liquid mixture, then the liquid mixture is subjected to the reflux reaction, cooled, separated and dried, and dibutyltin dilaurate is obtained. The process is simple, requirements for equipment are lower, the method takes short time and is convenient, efficient and environment-friendly, and the obtained dibutyltin dilaurate has no solvent or catalyst residues.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a synthesis method of dibutyltin dilaurate. Background technique [0002] Dibutyltin dilaurate is an organic tin compound with excellent transparency, lubricity and weather resistance. It can not only be used as a catalyst in the synthesis of silicone rubber, acrylate rubber, carboxyl rubber and polyurethane foam, but also widely used in wood Production of lacquers, PU coatings, metallic inks, adhesives and sealants. [0003] In industry, tetrabutyltin or tin tetrachloride is often used as the starting material to synthesize the intermediate product, and then condensed with lauric acid to obtain dibutyltin dilaurate. This process will produce a large amount of waste water and pollute the environment. Therefore, research on the green and pollution-free dibutyltin dilaurate synthetic method has become a hotspot. Notification number is CN102838631B " a kind o...

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Problems solved by technology

Notification number is CN102838631B " a kind of synthetic method of dibutyltin laurate " patent discloses a kind of technology that takes lauric acid and dibutyltin oxide as raw material, and ethanol is the technique of solvent synthesis dibutyltin laurate, and this technique saves Eliminate the alkalization process, no toxic dust and waste water, no pollution to the environment, but because of the use of ethanol as a solvent, it will cause ethanol residue in the product

The patent of "a synthetic method for preparing dibutyltin dilaurate" with the publication number CN104672276A discloses a process of using lauric acid and dibutyltin oxide as raw materials and adding a catalyst synthesis reaction under the action of a solvent. The recycling efficiency is improved, the production cost is reduced, and the production equipment is simple, and the environmental pollution is less in the process, but the process has many steps and the synthesis takes a long time

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