Gas separation: processes – Solid sorption
Patent
1997-07-22
1999-10-19
Spitzer, Robert
Gas separation: processes
Solid sorption
95128, 95148, 71 51, 423237, 423352, B01D 5304
Patent
active
059682329
ABSTRACT:
A process for the separation of ammonia dissolved in a gaseous solvent is used to recover ammonia during the production of ammonia from a synthesis gas. The process may be used to extract and recover ammonia in either the supercritical region or the subcritical region. The process can be used to remove ammonia from synthesis gas, or other gaseous solvents, by removing ammonia whose chemical potential decreases as the density of the solvent increases. The process utilizes a sorbent to remove the ammonia followed by an in situ regeneration of the sorbent and recovery of the ammonia. Typically, a gaseous solvent containing the ammonia is passed through a bed of sorbent to sorb the ammonia onto the bed of sorbent, thereby producing a purified gaseous solvent. At least a portion of the gaseous solvent is then acted upon to increase its solvent capacity for the ammonia. The increased solvent capacity gaseous solvent is passed through the bed of sorbent in the opposite direction to desorb the ammonia from the bed of sorbent to provide an increased solvent capacity gaseous solvent. The ammonia may then be recovered from the increased solvent capacity gaseous solvent.
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Anastasi John N.
Spitzer Robert
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