Concentrating evaporators – Processes – Involving urea
Patent
1999-05-03
2000-12-26
Tran, Hien
Concentrating evaporators
Processes
Involving urea
202158, 2611143, 422193, 564 67, C07C27302, B01J 1000
Patent
active
061653152
ABSTRACT:
A reactor for the synthesis of urea from ammonia and carbon dioxide at elevated temperature and pressure is provided with perforated reactor trays in which at least a pair of spaced part perforated reactor trays each have at least one opening at least a distance closer towards the periphery than the center, such as on or near the edge of a perforated reactor tray, and each of such pair perforated reactor trays is provided with a tube with a height of 50-500 mm located on and depending from an underside, e.g. bottom side in a column reactor, of each of such pair perforated reactor tray. The tubes extend to no more than 1/3 of the distance between two adjacent reactor trays.
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Declaration of Henrik F. Perree, Jun. 3, 1997.
Jonckers Kees
Perree Hendrik F.
DSM N.V.
Tran Hien
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