Process for separating carbon dioxide and ammonia

Claim 1

A PROCESS OF SEPARATING CARBON DIOXIDE FROM AMMONIA COMPRISING PASSING, UNDER PRESSURE IN AN ABSORPTION ZONE, A CARBON DIOXIDE AMMONIA MIXTURE IN CONTACT WITH AN AQUEOUS SOLUTION OF A SUBSTANCE TAKEN FROM THE GROUP CONSISTING OF AMMONIUM NITRATE AND UREA NITRATE, THE AMMONIA BEING ABSORBED BY THE SOLUTION TORELEASING FORM AN AMMONIA CONTAINING EFFLUENT SOLUTION, RELEASING AT LEAST PART OF THE PRESSURE UPON SUBSTANTIALLY ALL OF THE SAID EFFLUENT SOLUTION TO VAPORIZE AT LEAST PART OF THE AMMONIA THEREFROM AND TO COOL THE EFFLUENT SOLUTION, SEPARATING THE VAPORIZED AMMONIA FROM THE COOLED EFFLUENT SOLUTION IN A SEPARATION ZONE UNDER SAID RELEASED PRESSURE AND RECYCLING AT LEAST PART OF THE SEPARATED COOLED EFFLUENT TO ABSORB, BY HEAT EXCHANGE, HEAT OF ABSORPTION DEVELOPED IN THE ABSORPTION ZONE AND TO VAPORIZE MOREE AMMONIA FROM THE SAID RECYCLED EFFLUENT, AND THEREAFTER PASSING THE RECYCLED EFFLUENT TO A SECOND SEPARATION ZONE TO REMOVE AMMONIA GAS FROM THE EFFLUENT AND THEN RECYCLING PART OF THIS EFFLUENT TO ABSORB HEAT OF ABSORPTIONN IN THE ABSORPTION ZONE BY HEAT EXCHANGE AS AFORESAID, STRIPPING ANOTHER PART OF THIS EFFLUENT FREE OF REMAINING AMMONIA AND RETURNING THE STRIPPED EFFLUENT TO CONTACT THE CARBON DIOXIDE AMMONIA MIXTURE TO ABSORB AMMONIA THEREFROM.