Method for the purification and separation of gas mixtures

Claim 1

A METHOD OF SEPARATING AND RECOVERING ONE OF THE COMPONENTS OF A GAS MIXTURE BY ABSORPTION IN A LOW TEMPERATURE WASHING LIQUID COMPRISING, COOLING SAID GAS MIXTURE TO ABOUT THE TEMPERATURE OF SAID WASHING LIQUID, COOLING AN AUXILIARY GAS TO ABOUT SAID TEMPERATURE, SAID GAS MIXTURE AND AUXILIARY GAS EACH BEING SEPARATELY COOLED IN COLD ACCUMULATORS, WASHING SAID COOLED GAS MIXTURE WITH SAID LOW TEMPERATURE WASHING LIQUID TO ABSORB SAID ONE COMPONENT AT A PRESSURE ABOVE ATMOSPHERIC, REDUCING THE PRESSURE OF SAID LIQUID CONTAINING SAID ONE COMPONENT, CONTACTING SAID LIQUID AT SAID REDUCED PRESSURE COUNTERCURRENTLY WITH SAID COOLED AUXILIARY GAS TO REMOVE SAID ABSORBED ONE COMPONENT, AND CYCLICALLY COOLING OTHER COLD ACCUMULATORS, WHICH IN A PREVIOUS CYCLE WERE USED TO COOL SAID GAS MIXTURE AND SAID AUXILIARY GAS, WITH UNABSORBED GAS FLOWING FROM SAID ABSORPTION STEP AND BY THE MIXTURE OF REMOVED ONE COMPONENT AND AUXILIARY GAS FROM SAID DESORPTION STEP.

Claim 2

A METHOD OF SEPARATING AND RECOVERING ONE OF THE COMPONENTS OF A GAS MIXTURE BY ABSORPTION IN A LOW TEMPERATURE WASHING LIQUID COMPRISING, COOLING SAID GAS MIXTURE TO ABOUT THE TEMPERATURE OF SAID WASHING LIQUID, COOLING AN AUXILIARY GAS TO ABOUT SAID TEMPERATURE, SAID GAS MIXTURE AND AUXILIARY GAS EACH BEING SEPARATELY COOLED IN COLD ACCUMULATORS, WASHING SAID COOLED GAS MIXTURE WITH SAID LOW TEMPERATURE WASHING LIQUID TO ABSORB SAID ONE COMPONENT AT A PRESSURE ABOVE ATMOSPHERIC, REDUCING THE PRESSURE OF SAID LIQUID CONTAINING SAID ONE COMPONENT, CONTACTING SAID LIQUID AT SAID REDUCED PRESSURE COUNTERCURRENTLY WITH SAID COOLED AUXILIARY GAS TO REMOVE SAID ABSORBED ONE COMPONENT, AND CYCLICALLY COOLING OTHER COLD ACCUMULATORS, WHICH IN A PREVIOUS CYCLE WERE USED TO COOL SAID GAS MIXTURE AND SAID AUXILIARY GAS, WITH UNABSORBED GAS FLOWING FROM SAID ABSORPTION STEP AND BY THE MIXTURE OF REMOVED ONE COMPONENT AND AUXILIARY GAS FROM SAID DESORPTION STEP.