USE OF CRYOGENIC TEMPERATURES IN PROCESSING OF GAS CONTAINING LIGHT COMPONENTS BY PHYSICAL SOLVENTS Russian patent published in 2009 - IPC F25J3/02 

FIELD: heating.

SUBSTANCE: method of component separation in multicomponent gas flow involves multicomponent gas flow cooling down to -84°C or lower by self-cooling due to pressure drop in multicomponent gas flow after heat exchange and before flow contact to solvent in extraction aggregate. Further the flow contacts solvent in extraction aggregate approximately -84°C or lower to generate upper flow rich with at least one unabsorbed component, and saturated flow of solvent vat fractions rich with at least one absorbed component. The flow rich with solvent vat fractions is evaporated for one time in at least one phase with reduced pressure to recycle weak solvent and generate upper flow rich with at least one absorbed component. Recovered weak solvent is returned to extraction aggregate.

EFFECT: improved efficiency of gas separation.

35 cl, 9 dwg