Equipment and method for rectifying and separating azeotrope of ethyl acetate and ethanol

Abstract

The invention discloses equipment for rectifying and separating an azeotrope of ethyl acetate and ethanol. The equipment comprises a condenser I, a distillation kettle, a reboiler I, a reboiler II, aphase splitter, a pump I, a pump II, a condenser II, a recovery tower, a condenser III, a reflux tank, a pump III and a pump IV, wherein each of the condenser I, the condenser II and the condenser IIIcomprises a condenser body with a feeding pipe, a discharging pipe, a water inlet pipe, a water outlet pipe, a condensation cavity and a condensation pipe, the condensation pipe is of a double-layerpipe structure and comprises an inner pipe and an outer supporting pipe, the outer supporting pipe is arranged on the outer side of the inner pipe in a sleeving mode, a plurality of condensation wingsevenly distributed along the circumference are integrally formed on the outer side wall of the inner pipe, and wrapping parts wrapping the condensation wings are arranged on the outer supporting pipe.

Description

Technical field[0001]The invention belongs to the technical field of rectification of ethyl acetate and ethanol azeotrope, and specifically refers to a device and method for rectifying and separating ethyl acetate and ethanol azeotrope.Background technique[0002]Ethyl Acetate (EA), also known as ethyl acetate, is a branch of downstream derivatives of acetic acid. It belongs to the category of chemical solvents. It is an important green organic solvent with excellent solubility and is a fast-drying industrial solvent. Ethyl acetate is widely used in the production of fibers, rubber, resin and other polymers and pharmaceutical intermediates; it can also be used to produce liquid nitrocellulose inks for copiers; it is used as a freshener in the textile industry; it is used as a special product in the food industry. Modified alcohol flavor extractant; it is the most important flavor additive in the flavor industry and can be used as a component of flavoring agents. In addition, ethyl ace...

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Problems solved by technology

[0003] At present, the ethyl acetate production method mainly adopts the esterification method of acetic acid and ethanol. During the reaction process, the ethanol is excessive, and the ethanol and water in the crude ethyl acetate obtained cannot meet the high-quality products of "GB / T 3728-2007 Industrial Ethyl Acetate" Purity of 99.7% is required, and further separation and purification are required, but the difference between the boiling point of ethyl acetate and ethanol is only 1°C and there is azeotropy, so the production of high-purity ethyl acetate cannot be achieved by ordinary distillation

At present, there are azeotropic rectification and extractive rectification for its separation methods in industry, but the effect of existing condensers and stills is not ideal, so the effect of rectification separation is not ideal

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