Nested enrichment cascade distillation of unequal mixtures

Details Nested enrichment cascade distillation of unequal mixtures Nested enrichment cascade distillation of unequal mixtures

1986-06-10

1989-04-25

Lacey, David L.

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating the distillation zone

203 27, 203 75, 203 77, 203 78, 203 80, 203DIG8, 203DIG9, 62 34, B01D 314

Patent

active

048245275

ABSTRACT:
A fractional distillation system is provided for fractionating unequal liquid mixtures with lower heat throughput and lower energy consumption. For mixtures in which the heavy fraction is predominant (FIG. 1), a stripper (2) pre-fractionates part of the mixture at lower pressure and at no extra energy cost by being reboiled by an intermediate condenser (3). The pre-fractionator temperature range is preferably nested within (overlapped by) the distillation column (6) temperature range.

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C. J. King, "Separation Processes", McGraw Hill, 1980, 2nd ed., pp. 219 and 692-694.

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