Two mainstream routes produce sec-butyl acetate (SBA): isobutanol-acetic acid esterification and n-butene-acetic acid addition. New plants prefer SL TECH’s addition process for far lower costs, containing four sections: feed purification, esterification, product separation and acid recovery. Versus esterification, it features shorter flow, fewer devices, 40–50% lower production cost, merely 5% energy consumption, easier operation and less maintenance. Its non-toxic solid acid catalyst also cuts pollution and equipment corrosion.