Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1991-10-01
1993-09-14
Langel, Wayne
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
159 401, 159 481, 203 90, 423313, 423550, B01B 100, B01D 116, C01C 1242, C01B 2528
Patent
active
052446450
ABSTRACT:
This invention is a process for removing NH.sub.3 from a NH.sub.3 -containing liquid stream. The process contains the following steps: (a) passing a NH.sub.3 -containing first liquid stream, a heated first gaseous stream, and an ammonium salt-containing second liquid stream obtained from step (d) of this process to a spray drying zone thereby spray drying the liquid stream and producing a spray drying zone effluent containing ammonia-containing gas and solid particles containing ammonium salts; (b) passing the spray drying zone effluent to a solid/gas separating means thereby separating and removing at least a portion of the solid particles and thereby producing a second gaseous stream comprising ammonia and entrained solid particles containing ammonium salts; (c) passing the second gaseous stream to a scrubbing zone to scrub the second gaseous stream, at scrubbing conditions, in the presence of an inorganic or organic acid thereby forming a gaseous stream substantially free of ammonia and an ammonium salt-containing liquid stream containing ammonium salts; and (d) passing at least a portion of the ammonium salt-containing liquid stream as the second liquid stream to the spray drying zone.
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Hadlock Timothy J.
Langel Wayne
Shell Oil Company
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