Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1996-01-30
1998-05-26
Capossela, Ronald C.
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62630, F25J 100
Patent
active
057551154
ABSTRACT:
The present invention is an improvement in distillation column interreboiling. Previously, hot bottoms streams could be used to heat interreboilers, although heat recovery was limited by approach temperatures of a stream losing sensible heat to a stream gaining sensible heat and heat of vaporization. The present invention expands the number of stages between the draw and return stages for an interreboiler, thus increasing the heat recovery from the bottom stream and reducing hot utilities to the reboiler, among other important advantages. The present invention is shown for NGL deethanization.
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