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醋酸生产过程包括连续地反应步骤,即从甲醇,二甲醚和醋酸甲酯中选择至少一种与一氧化碳反应,在反应器1中,所使用的催化系统包含存在于醋酸和水中的铑催化剂,碘盐和甲基碘;闪蒸蒸发步骤,即将来自反应器1的液体反应混合物连续地加入闪蒸器2,从液体反应介质分离出液体流和气化流;和蒸馏步骤,即加入蒸馏塔3,用净化醋酸得到的气化流加热;部分气化流引入热交换器7冷凝,通过热交换器7冷凝的液体流循环到反应器。
The acetic acid production process comprises a continuous reaction step of reacting at least one selected from the group consisting of methanol, dimethyl ether and methyl acetate with carbon monoxide, and in reactor 1 the catalytic system used comprises a rhodium catalyst present in acetic acid and water, Iodine salt and methyl iodide; a flash evaporation step of continuously adding the liquid reaction mixture from reactor 1 to flasher 2 to separate the liquid stream and the gasification stream from the liquid reaction medium; and a distillation step of adding to distillation column 3, The vaporized stream obtained by purifying acetic acid is heated; the partial vaporized stream is introduced into a heat exchanger 7 for condensation, and the liquid stream condensed by the heat exchanger 7 is recycled to the reactor.