Distillation processes and apparatus

Details Distillation processes and apparatus Distillation processes and apparatus

1975-03-21

1977-05-24

Sofer, Jack

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating the distillation zone

202154, 202155, 202158, 202172, 261148, 203100, 203DIG19, 203 98, B01D 300, B01D 314, F02M 1100

Patent

active

040253988

ABSTRACT:
In a fractional distillation process and apparatus two columns are intercoupled to provide variable reboil in one and variable reflux in the other so as to approach closely to thermodynamically ideal fractionation. The variable reboil column has a series of heat transfer assemblies at different levels up its height and these are fed with vapor withdrawn from respective different levels of the variable reflux column. Partial condensation of each withdrawn stream takes place in the respective heat transfer assembly, after which the partially condensed stream is returned to the variable reflux column at a level close to the level at which the corresponding vapor was withdrawn. The variable reflux column will ordinarily be at a higher pressure, and mounted at a lower level than the variable reboil column.

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