Preparation process of dibutyltin oxide

Abstract

The invention relates to a preparation process of dibutyltin oxide. According to the preparation process, dibutyltin chloride and sodium hydroxide are taken as raw materials and subjected to a synthesis reaction under the action of a surfactant, finally, centrifugal water washing, vacuum drying and smashing are performed, and a finished product, namely, dibutyltin oxide, is prepared; the surfactant used in the synthesis process is one of n-heptane, toluene and ethanol, and a sodium hydroxide solution is added twice in the reaction process. The preparation process of dibutyltin oxide has the advantages that the synthesis raw materials and the reaction process are simple, little waste is discharged, and the production cost is saved; the reaction is controllable, the operation is simple and convenient, the product purification process is simple, and the product is high in purity and good in color; the surfactant can be completely separated from the product and recycled; the conversion rate of the raw material dibutyltin chloride can reach 99.80%.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a preparation process of dibutyltin oxide. Background technique [0002] Organotins are usually used in the production of polyurethane and other products, especially in polyurethane foam, coatings, elastomers, adhesives, resins and other industries. [0003] Dibutyltin oxide can be used as a catalyst, heat stabilizer and intermediate in many fields. Dibutyltin oxide is a near-neutral homogeneous surfactant with mild reaction conditions, high yield, fast reaction speed, high efficiency and non-toxicity, non-corrosive to the reaction vessel, and high stereo and regioselectivity It has good stability and hydrolysis resistance, and is an organotin surfactant with multiple industrial uses. Dibutyltin oxide can be used as a heat stabilizer in the production of polyvinyl chloride and organotin plastics. Secondly, dibutyltin oxide can also be used as an intermediate with exc...

AI Technical Summary

Problems solved by technology

[0004] The domestic prior art discloses some researches on the preparation process of dibutyltin oxide, and the patent CN101665510A discloses a preparation method of dibutyltin oxide in a granular state, using dibutyltin chloride, sodium hydroxide solution, medium The method of preparing dibutyltin oxide as raw materials with an agent and a surfactant, the product is in a granular state, and the reaction is efficient and controllable; but the process is complex, with many steps and many additives used, thereby increasing the production cost, and the reaction additives remain In the product, no separation

[0005] Li Quan and others disclosed an improved process for the preparation of dibutyl tin oxide (improved preparation of dibutyl tin oxide, Li Quan et al., Yunnan Chemical Industry, Volume 29, No. 2, 2002): Tin, sodium hydroxide solution and ether are used as raw materials to prepare dibutyltin oxide. The synthesis process is simple and the operation is simple, but the ether used in the reaction has a low boiling point, the effect is not good, and the yield of the prepared product is low

Wu Liang disclosed a synthesis method of dibutyltin oxide (process improvement of the synthesis method of dibutyltin oxide, Wu Liang, Plastic Additives, No. 4, 2007): with sodium hydroxide, surfactant, solvent Prepare dibutyl tin oxide with dibutyl tin oxide as raw material, control the dropping rate, and keep warm for reaction. This process has few operation steps and controllable reaction, but the production cost of this reaction is high and the product purity is low

[0006] The problems of high cost, complex process, cumbersome operation, low yield and low product purity generally exist in the above technical research and industrial scale production of dibutyltin oxide.

Images