Recovery of dissolved light gases from a liquid stream

Details Recovery of dissolved light gases from a liquid stream Recovery of dissolved light gases from a liquid stream

1991-04-08

1992-12-01

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 42, F25J 302

Patent

active

051671255

ABSTRACT:
This invention relates to an improved distillation process for recovering exceptionally light gases, e.g. hydrogen, neon, and helium from gas streams containing higher boiling components, e.g., nitrogen and C.sub.1-2 hydrocarbons. The improvement resides in partially condensing a vapor obtained from a top section in a distillation system thereby concentrating light gases in a vapor phase and concentrating heavier components in the liquid phase. The uncondensed vapor phase rich in light gases is separated from the condensed phase and recovered as product or processed further to further concentrate the light gases. In addition, at least a portion of feed which is to be introduced to the column is cooled against liquid in a bottom section of the distillation system of the column to generate boilup and remove essentially all traces of light gases from the liquid. A purified liquid substantially free from light gases is removed from the bottom of the column.

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