Urea granulation process with scrubbing system

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United States of America Patent

PATENT NO 9493407
APP PUB NO 20150133689A1
SERIAL NO

14399473

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Abstract

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Disclosed is a method for producing granular urea and reducing ammonia emissions in a gaseous waste stream of the urea granulation process. The method includes the steps of granulating urea and generating a gaseous waste stream from the granulation of the urea, first washing the waste stream in a first scrubber dust stage to remove dust form the gaseous waste stream, and then reacting the gaseous waste stream with formaldehyde in a formaldehyde stage to generate a hexamethylenetetramine and urea-formaldehyde liquid stream, and an ammonia-reduced off-gas stream.

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Patent Owner(s)

Patent OwnerAddress
UHDE FERTILIZER TECHNOLOGY B V6042 NW ROERMOND

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Franzrahe, Harald Dortmund, DE 17 48
Potthoff, Matthias Dortmund, DE 13 37
Vanmarcke, Luc Albert Lembecke, BE 6 13

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