| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to method of obtaining acetic acid, which includes: (a) carbonylation of methanol in presence of catalyst to form reaction mixture; (b) instant evaporation and distillation of reaction mixture in evaporator, equipped with distillation column to form liquid flow, including catalyst, from evaporator boiler, and steam flow from upper part of distillation column, and (c) return of liquid flow into the cycle to stage (a), with steam flow being distilled in stripping column to form bottom flow of raw acetic acid and flow of distillate steam, which is condensed and separated into light phase and heavy phase, part of light phase is introduced into the top part of evaporator distillation column, and liquid flow is withdrawn from the bottom of evaporator distillation column and directed to the top of stripping column to obtain practically pure acetic acid.EFFECT: increased method efficiency.11 cl, 2 dwg, 2 ex |
