One kind esterification process and its application

The invention discloses an esterifying method and application thereof. The esterifying method disclosed by the invention comprises the steps of evenly mixing and stirring mercaptopropionic acid, a catalyst and methyl alcohol, standing to react after stirring is finished and then obtaining a product. According to a methyl mercaptopropionate preparation method disclosed by the invention, an esterification reaction temperature is slightly reduced and is reduced by 2 to 4 DEG C compared with a traditional esterification reaction temperature; furthermore, forced mixing is avoided in a standing reaction process, so that manpower and material resources are saved; along with reaction between the mercaptopropionic acid and the methyl alcohol, oil-phase methyl mercaptopropionate and water are generated to form a two-phase system; a water phase is lighter and rises slowly, and an oil phase is heavier and sinks slowly; as separation of the two phases cannot affect further contact reaction between the mercaptopropionic acid and the methyl alcohol, esterification reaction can be successfully performed until a balance system is formed and the whole esterificaiton reaction is finished. Furthermore, a conversion ratio of the whole standing esterification reaction is similar to that of traditional forced mixing and is slightly improved.