Method for preparing tert-amyl alcohol

The invention discloses a method for preparing tert-amyl alcohol. The method disclosed by the invention comprises the following steps: enabling isopentene-enriched materials, water and promoter mixtures to simultaneously enter a static mixer, mixing, and introducing the mixed materials to enter a fixed bed reactor filled with a strong acid cation exchange resin to carry out hydration reaction; andsimply distilling and rectifying after the reaction is ended, thereby obtaining the high-purity product (tert-amyl alcohol) on a column reactor. According to the method disclosed by the invention, tetrabutylammonium bromide is added into a hydrate system to serve as the promoter, the contact environment between isopentene and an active center on the catalyst surface is improved, the liquid film lipophilicity on the catalyst surface is improved, contact resistance between isopentene and the catalyst surface is reduced, diffusion of isopentene to the active center of the catalyst surface is facilitated, and the reactio