FIELD: control of mass-exchange unsteady process of evaporation on batch plant used in chemical, paint-and-varnish and chemicopharmaceutical industries for regeneration of acetic acid. SUBSTANCE: use is made of electric conduction as indicator of distillates concentration in receivers and still bottoms in evaporator for determination of neutralization point of evaporated solution in supply of alkali solution, moments of changing over of distillate flows from one receiver to another, finishing of the process of evaporation, and also crystallization of still bottoms due to supply of water for unloading of evaporator contents. EFFECT: higher efficiency. 1 dwg
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