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1. WO2000043358 - PROCESS FOR THE PREPARATION OF UREA

Publication Number WO/2000/043358
Publication Date 27.07.2000
International Application No. PCT/NL2000/000044
International Filing Date 20.01.2000
Chapter 2 Demand Filed 01.08.2000
IPC
C07C 273/04 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
273Preparation of urea or its derivatives, i.e. compounds containing any of the groups the nitrogen atoms not being part of nitro or nitroso groups
02of urea, its salts, complexes or addition compounds
04from carbon dioxide and ammonia
CPC
C07C 273/04
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
273Preparation of urea or its derivatives, i.e. compounds containing any of the groups , the nitrogen atoms not being part of nitro or nitroso groups
02of urea, its salts, complexes or addition compounds
04from carbon dioxide and ammonia
Applicants
  • DSM N.V. [NL/NL]; Het Overloon 1 NL-6411 TE Heerlen, NL (AllExceptUS)
  • MENNEN, Johannes, Henricus [NL/NL]; NL (UsOnly)
  • JONCKERS, Kees [NL/NL]; NL (UsOnly)
Inventors
  • MENNEN, Johannes, Henricus; NL
  • JONCKERS, Kees; NL
Agents
  • VAN BOKHOVEN, Petrus, Hubertus, Maria; DSM Patents & Trademarks P.O. Box 9 NL-6160 MA Geleen, NL
Priority Data
101112325.01.1999NL
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR THE PREPARATION OF UREA
(FR) PROCEDE DE PREPARATION D'UREE
Abstract
(EN)
The invention relates to a process for the preparation of urea from ammonia and carbon dioxide, the preparation being effected in whole or in part in a vertical combi-reactor. The gas stream leaving the stripper is fed to the condenser section of a vertical combi-reactor in which this gas stream is wholly or partially condensed in the carbamate stream which is transferred from the scrubber section to the condenser section via a downcomer. Ammonia and carbon dioxide are partially converted into urea in this condenser section of the combi-reactor. The urea conversion is completed in the reaction section of the combi-reactor.
(FR)
Ce procédé sert à élaborer de l'urée à partir d'ammoniac et de gaz carbonique, totalement ou partiellement dans un réacteur combiné vertical. Le courant gazeux de la colonne de stripping est envoyé dans l'étage condenseur du réacteur combiné vertical où la condensation partielle ou totale du courant gazeux donne naissance à un courant de carbamate qui est transféré via un trop-plein de l'étage laveur à l'étage condenseur. L'ammoniac et le gaz carbonique se convertissent partiellement en urée dans l'étage condenseur du réacteur combiné. La conversion de l'urée s'achève dans l'étage réacteur du réacteur combiné.
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