Abstract: A novel operation of batch distillation-ombination of varying column pressure and total
reflux-total efflux is studied experimentally. In the operation, the product is accumulated
at the top of the column under total reflux and then drained off completely, and the column
pressure is varying in the whole process. This process has been industrialized successfully
with large profits. The conventional mode of batch distillation is improved by this method
effectively: the separation efficiency and the yield of product are increased greatly, the
operation time is shortened and the production cost is cut down. Moreover, the amount of
condensation water is decreased and the over-high reboiler temperature is lowered.

Key words: total reflux-total effiux, varying column pressure, batch distillation

摘要： A novel operation of batch distillation-ombination of varying column pressure and total
reflux-total efflux is studied experimentally. In the operation, the product is accumulated
at the top of the column under total reflux and then drained off completely, and the column
pressure is varying in the whole process. This process has been industrialized successfully
with large profits. The conventional mode of batch distillation is improved by this method
effectively: the separation efficiency and the yield of product are increased greatly, the
operation time is shortened and the production cost is cut down. Moreover, the amount of
condensation water is decreased and the over-high reboiler temperature is lowered.

关键词: total reflux-total effiux;varying column pressure;batch distillation