Urea granulation process with scrubbing system

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United States of America Patent

PATENT NO 9745256
APP PUB NO 20160376230A1
SERIAL NO

15260018

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Abstract

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A urea granulation process with a scrubbing system may involve at least one gaseous waste stream for removal of dust and ammonia whereby the waste stream may be processed through a combination of process steps. In some examples, the process steps may involve washing the dust and ammonia laden stream with water and/or an aqueous urea solution whereby a dust-laden liquid stream and a dust-reduced stream is generated. The process steps may further involve reacting the dust-reduced stream with formaldehyde to form a stream comprising hexamethylenetetramine and urea-formaldehyde and clean off-gas. In some cases, the gas stream may be directed first through the washing step and then through the reacting step.

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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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