The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1993
Filed:
Oct. 01, 1991
Humbert H Chu, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
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.