| 摘要 |
Distillation apparatus which comprises first and second distillation columns (2 and 16); a compressor (27); and first and second heat-exchange means (5 and 19); means for supplying a feed to about the mid-point of the first distillation column (2); means for passing a portion of the bottoms from the first distillation column (2) to towards the top of the second distillation column (16); means for circulating a portion of the bottoms from the first distillation column (2) to one side of the first heat-exchange means (5); means for circulating bottoms from the second distillation column (16) to one side of the second heat-exchange means (19); means for passing an overhead from the second distillation column (16) to towards the bottom of the first distillation column (2); means for removing a high-boiling component from the bottom of the second distillation column (16); means for removing, as purified product, an overhead from the first distillation column (2); means for circulating an overhead from the first distillation column (2), via the compressor (27), to the other side of the first heat-exchange means (5); and means for supplying hot water or steam to the other side of the second heat-exchange means (19). |
