Method for synthesizing sec-butyl acetate from acetic acid and linear butylene

Abstract

The invention relates to a synthetic method of the sec-butyl acetate with the acetic acid and linear butylene. The invention is characterized in that a fixed-bed reactor is used; the solid catalyst is used; when the butylenes pressure is between 2 and 15 kilograms per square centimeters and the reaction temperature is between 90 and 160 Celsius system, the acetic acid and olefin react and compose the sec-butyl acetate under the gas-liquid-solid reaction condition; therein, the ratio between the cetic acid and olefin is from 1 to 1.15 to 1 to 1.80; the material feeding airspeed of the acetic acid is 1.0 to 1.8 liters per hour; the solid catalyst is the modified resin catalyst, silica gel loading heteropoly acid catalyst, silica gel loading phosphoric acid catalyst or super acid catalyst. The invention overcomes the erosion of the equipment, the side reaction, the difficult treatment of the waste liquid of the reaction, and the difficult separation of water in the traditional process, which may cause the increase of the energy consumption; the invention can greatly lower the production cost of the product.

Description

technical field [0001] The invention relates to a method for synthesizing sec-butyl acetate from acetic acid and linear butenes (including butene-1 and butene-2) through direct addition esterification. Background technique [0002] Secondary butyl acetate is a colorless, flammable, fruity liquid, insoluble in water, miscible with ethanol and ether. It can be widely used in fruit flavor essence; it can be used as a solvent for nitrocellulose paint, acrylic paint, polyurethane paint, etc.; it can be used in the manufacture of celluloid products, coated paper, patent leather, etc.; it can be used as a volatile solvent in printing ink; It can be used as a quick-drying agent for photosensitive materials; it can be used as a drug absorption promoting component; as a reaction medium; it can be used as azeotropic distillation solvent component and partially replace the occasions where toluene, xylene and methyl isobutyl ketone were used as solvents in the past ; It can also be used...

AI Technical Summary

Problems solved by technology

[0019] The object of the present invention is to provide a kind of method that is practical by acetic acid and linear butene synthetic sec-butyl acetate in industrial production, and the solid catalyst that can be applicable to this method, overcomes the equipment corrosion that traditional method exists, side reaction And the problem that the reaction waste liquid is difficult to deal with; it also overcomes the problem of increased energy consumption caused by the difficulty of water separation in the traditional method