PROCESS FOR THE RECOVERY OF AMMONIA FROM A GASEOUS STREAM

• Main Authors: MIRACCA, IVANO, CASARA, PAOLO, GIANAZZA, ALESSANDRO
• Format: Patent
• Language: English
• Published: 29.01.2016
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

THE PRESENT INVENTION RELATES TO A PROCESS FOR THE RECOVERY OF AMMONIA CONTAINED IN A GASEOUS STREAMIS DESCRIBED, SAID PROCESS COMPRISING THE FOLLOWING PHASES: (A) SUBJECTING THE GASEOUS STREAM CONTAINING AMMONIA TO A WASHING (S) WITH AN AQUEOUS WASHING SOLUTION (5A) HAVING A PH LOWER THAN 7.0, WITH THE FORMATION OF A PURIFIED GASEOUS STREAM (6) AND AN AQUEOUS SOLUTION (7) CONTAINING AN AMMONIUM SALT; (B) SUBJECTING THE AQUEOUS SOLUTION CONTAINING THE AMMONIUM SALT COMING FROM PHASE (A) TO A DISTILLATION PROCESS (MD) WITH A HYDROPHOBIC MICROPOROUS MEMBRANE AT A TEMPERATURE RANGING FROM 50 TO 250°C AND A PRESSURE RANGING FROM 50 KPa TO 4 MPa ABSOLUTE WITH THE FORMATION OF A REGENERATED WASHING SOLUTION (16) AND A GASEOUS STREAM (18) COMPRISING NH3 AND H2O; (C) RECYCLING SAID REGENERATED WASHING SOLUTION TO PHASE (A). THE EQUIPMENT FOR CARYING OUT THE ABOVE PROCESS IS ALSO DESCRIBED