Real-time controlled azeotropic distillation device for production of sec-butyl acetate

Abstract

The invention provides a real-time controlled azeotropic distillation device for production of sec-butyl acetate. The real-time controlled azeotropic distillation device comprises an azeotropic distillation tower. A material inlet arranged on the lower portion of the azeotropic distillation tower and a liquid-phase outlet arranged at the bottom of the azeotropic distillation tower are communicatedwith a material inlet tube and a liquid-phase outlet tube respectively. A by-pass pipeline is arranged on each of the material inlet tube and the liquid-phase outlet tube. An online component contentmonitoring and analyzing device is arranged on each by-pass pipeline. The real-time controlled azeotropic distillation device has the advantages that component contents of inlet materials and liquid-phase outlet materials of the azeotropic distillation tower are monitored online, so that testing and analyzing workload is reduced, testing and analyzing steps are simplified, testing and analyzing time is shortened, delay of monitoring data is avoided, production data can be provided for production control timely and accurately, and stability in production control is improved.

Description

technical field [0001] The invention relates to sec-butyl acetate production equipment, in particular to an azeotropic rectification device for realizing real-time control in the production of sec-butyl acetate. Background technique [0002] In the production process of sec-butyl acetate produced by acetic acid-butene addition method, it is necessary to separate excess acetic acid from sec-butyl acetate. Since the relative volatility of the two substances is close to 1, it is difficult to realize the separation of the two by ordinary rectification. Separation, in the prior art, all adopt azeotropic rectification column to adopt azeotropic rectification method to separate, and the entraining agent generally selected is water from aspects such as cost simultaneously. [0003] The introduction of water has solved the difficult problem of separation of acetic acid and sec-butyl acetate, but has also introduced new problem simultaneously---introduced new impurity water. Due to c...

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Problems solved by technology

[0004] However, general chemical analysis requires sampling, testing and other processes. Not only is the operation cumbersome and lagging behind, but also it is impossible to realize real-time monitoring, which will cause unstable production and shorten the production process. Catalyst service life

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