The vapor–liquid and liquid–liquid phase equilibria in the reaction system of sec-butyl acetate production from n-butenes and acetic acid were simulated. The simulation made it possible to develop two variants of principal technological flowsheets of the process organization. The both variants are based on the principle of redistribution of the concentration fields between the separation regions: in the first case, due to the chemical reaction; in the second case, owing to the splitting phenomenon. The material balances of the schemes were calculated, and the static operating parameters were determined. The first variant of the flowsheet does not enable one to obtain sec-butyl acetate of the required quality and, therefore, heteroazeotropic distillation for the separation of sec-butyl acetate from acetic acid was proposed in the second variant. The use of water as a heteroazeotrope-forming agent in the separation block allows the quality of sec-butyl acetate satisfying the environment standard requirements (GOST) to achieve at technologically appropriate operating parameters.

The use of sec-butyl acetate is also widespread.(1) used as paint solvent and ink solvent, widely used as nitro paint, acrylic paint, polyurethane paint, polyester paint, amino paint, epoxy paint and other solvents. (2) as a solvent for the synthetic resin manufacturing process. (3) as a solvent for the curing agent manufacturing process. (4) it is used as a diluent. (5) used as a cleaning agent: sec-butyl acetate can be used for washing water washing, washing water, washing plate. (6) used for the pharmaceutical industry: sec-butyl acetate can be used as antibiotics, hormones, vitamins in the production process of extractant; its volatile speed is moderate, with good skin permeability, can also be used as drug absorption to promote the composition. (7) used as a reaction medium: sec-butyl acetate can be used as a reaction medium, such as for the synthesis of trialkylamine oxide, N-di-ethyl ethylenediamine and so on. (8) used as a fine chemical: sec-butyl acetate can be used as a fine chemical extraction agent, such as extraction of ethanol - propanol, acrylic and other substances; can also be used for acetic acid recovery process for the azeotrope; for the cosmetics industry, such as nail polish manufacturing process. (9) used as a spice industry: sec-butyl acetate has a special fruit odor, can be used as flavor spices. (10) In addition, it can also be used as a quick-drying agent for photosensitive materials.