Method for enrichment by dual temperature exchange

An improved gas and liquid treating method wherein

• a. a liquid stream containing first fluid and a gas stream containing second fluid are contacted with each other in a contact zone at a first temperature, and
• b. the said liquid stream passing from the contact zone contains, and is thereafter stripped of second fluid dissolved therein,
• said method being improved by
• c. delivering to a separate stripping zone maintained at a temperature higher than said first temperature the liquid stream passing from said contact zone,
• d. at said stripping zone stripping from said liquid stream second fluid dissolved therein by passing stripping fluid in gaseous phase in countercurrent flow to said liquid stream,
• e. discharging from said stripping zone a gas effluent containing said stripped second fluid,
• f. discharging from said stripping zone a liquid effluent containing first fluid from which second fluid has been stripped,
• g. passing said liquid effluent in countercurrent indirect contact heat exchange with the liquid stream referred to in step (c) to aid in maintaining higher than said first temperature the temperature of said stripping zone, and
• h. delivering to said contact zone, for participation in the contacting therein, second fluid discharged from said stripping zone.