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Process for the reduction of ammonia emissions in a urea manufacturing process
Stamicarbon (NL).
Lund University/Chemical Engineering.
Malmö.ORCID iD: 0000-0002-4162-3680
2011 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

The present invention relates to a process for removing ammonia from an effluent of an ammonia enriched gaseous stream formed in or downstream the finishing section of a urea manufacturing process, said ammonia enriched gaseous stream comprising 200 mg NH 3 /Nm 3 or less, wherein the ammonia enriched gaseous stream is contacted with an aqueous composition comprising phosphoric acid thereby producing an ammonia enriched liquid effluent, wherein a bleed of the ammonia enriched liquid effluent is subjected to a urea decomposition step. The present invention also relates to a process for producing an ammonium phosphate essentially free of contaminants, said process comprising the following steps: (a) contacting an ammonia enriched gaseous stream comprising 200 mg NH 3 /Nm 3 or less with an aqueous composition comprising phosphoric acid thereby producing an ammonia enriched liquid effluent; and (b) subjecting a bleed of the ammonia enriched liquid effluent to a urea decomposition step.

Place, publisher, year, edition, pages
2011.
Keyword [en]
Urea, Ammonia removal
National Category
Chemical Engineering
Research subject
Technology (byts ev till Engineering)
Identifiers
URN: urn:nbn:se:lnu:diva-27931OAI: oai:DiVA.org:lnu-27931DiVA: diva2:639383
Patent
European patent Office EP2386346 (A1)
Available from: 2013-08-07 Created: 2013-08-07 Last updated: 2015-11-16Bibliographically approved

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Brandin, Jan

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