Process for the recovery of co2 of very high purity

Claim 1

A PROCESS FOR THE RECOVERY OF CO2 OF VERY HIGH PURITY, WHICH COMPRISES SCRUBBING IN A SCRUBBIN STAGE A PHYSICAL GAS CONTAINING CO2 UNDER A PRESSURE OF 5-100 ATMOSPHERES WITH A COUNTER-CURRENT STREAM OF A SCRUBBING LIQUID SELECTED FROM THE GROUP CONSISTING OF WATER AND A MIXTURE OF WATER AND A CHEMICAL WHICH INCREASE THE ABSORPTIVE POWER, FLASHING THE SCRUBBING LIQUID IN A FIRST POWER RECOVERY TURBINE TO A PRESSURE AMOUNTING TO 2080% OF THE PRESSURE PREVAILING IN THE SCRUBBING STAGE, CONDUCTING THE SCRUBBING LIQUID TO A SEPARATOR STAGE, SEPARATING FLUSH GAS FROM THE SCRUBBING LIQUID IN SAID SEPARATOR STAGE, DISCHARGING THE FLASH GAS FROM THE SEPARATOR STAGE, TRANSFERRING THE SCRUBBING LIQUID TO AT LEAST ONE INTERMEDIATE FLASHNG STAGE POSITIONED ABOVE AND CONNECTED WITH SAID SEPARATOR STAGE, SAID INTERMEDIATE FLASHING STAGE BEING MAINTAINED AT A PRESSURE DIFFERENTIAL OF FROM 0.3 TO 3 ATMOSPHERES BELOW THE PRESSURE IN SAID SEPARATOR STAGE BY THE DIFFERENCE OF THE STATIC LIQUID HEAD BETWEEN THE SEPARATOR STAGE AND THE FLASHING STAGE WHEREBY THE SCRUBBING LIQUID IS TRANSFERRED TO THE FLASHING STAGE SOLELY BY SAID PRESSURE DIFFERENTIAL, SEPARATING GAS FROM THE SCRUBBING LIQUID IN SAID INTERMEDIATE FLASH STAGE, DISCHARGING THE GAS FROM THE INTERMEDIATE FLASHING STAGE, TRANSFERRING THE SCRUBBING LIQUID TO A SECOND POWER RECOVERY TUBINE IN WHICH THE SCRUBBING LIQUID IS FURTHER FLASHED, CONDUCTING THE SCRUBBING LIQUID TO A DEGASIFICATION TANK WHEREIN THE CO2 OF VERY HIGH PURITY IS REMOVED, CONDUCTING THE SCRUBBING LIQUID TO A DEGASIFICATION TOWER IN WHICH THE LIQUID IS FREED FROM THE BALANCE OF THE ABSORBED GAS, AND RETURNING THE SCRUBBING LIQUID TO THE SCRUBBING STAGE BY MEANS OF A PUMP, SAID PUMP BEING POWERED BY SAID FIRST AND SECOND POWER RECOVERY TURBINES.