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1. WO2006094541 - PROCESS FOR UREA PRODUCTION AND RELATED PLANT

Publication Number WO/2006/094541
Publication Date 14.09.2006
International Application No. PCT/EP2005/012252
International Filing Date 15.11.2005
Chapter 2 Demand Filed 02.10.2006
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
B01J 10/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
10Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles; Apparatus specially adapted therefor
B01J 19/24 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
24Stationary reactors without moving elements inside
CPC
B01J 2219/00006
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2219Chemical, physical or physico-chemical processes in general; Their relevant apparatus
00002Chemical plants
00004Scale aspects
00006Large-scale industrial plants
B01J 2219/00103
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2219Chemical, physical or physico-chemical processes in general; Their relevant apparatus
00049Controlling or regulating processes
00051Controlling the temperature
00074by indirect heating or cooling employing heat exchange fluids
00087with heat exchange elements outside the reactor
00103in a heat exchanger separate from the reactor
B01J 2219/00108
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2219Chemical, physical or physico-chemical processes in general; Their relevant apparatus
00049Controlling or regulating processes
00051Controlling the temperature
00074by indirect heating or cooling employing heat exchange fluids
00105part or all of the reactants being heated or cooled outside the reactor while recycling
00108involving reactant vapours
B01J 2219/182
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2219Chemical, physical or physico-chemical processes in general; Their relevant apparatus
18Details relating to the spatial orientation of the reactor
182horizontal
B01J 2219/185
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2219Chemical, physical or physico-chemical processes in general; Their relevant apparatus
18Details relating to the spatial orientation of the reactor
185vertical
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
  • UREA CASALE S.A. [CH]/[CH] (AllExceptUS)
  • ROMITI, Domenico [CH]/[CH] (UsOnly)
  • STICCHI, Paolo [CH]/[CH] (UsOnly)
Inventors
  • ROMITI, Domenico
  • STICCHI, Paolo
Agents
  • ZARDI, Marco
Priority Data
05004732.303.03.2005EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR UREA PRODUCTION AND RELATED PLANT
(FR) PROCEDE DE PRODUCTION D'UREE ET INSTALLATION ASSOCIEE
Abstract
(EN)
A process for urea production from ammonia and carbon dioxide, made to react at a predetermined high pressure in an appropriate synthesis reactor (112), from the reaction between NH3 and C02 being obtained a reaction mixture comprising urea, ammonium carbamate and free ammonia in aqueous solution, from which a recovery of ammonium carbamate and ammonia is carried out with their subsequent recycle to the synthesis reactor (112), said recovery from the reaction mixture taking place through operative steps of decomposition of the ammonium carbamate into NH3 and CO2 and of their stripping and a subsequent operative step of their recondensation into ammonium carbamate that is recycled to the synthesis reactor, the said reaction mixture obtained from the reaction between ammonia and carbon dioxide being pumped to the operative steps of decomposition and stripping.
(FR)
L'invention porte sur un procédé de production d'urée à partir de NH3 et de CO2 réagissant sous une haute pression prédéterminée dans un réacteur de synthèse approprié (112). Le mélange ainsi obtenu, qui comprend de l'urée, du carbamate d'ammonium, et de l'ammoniac libre en solution aqueuse. On en extrait le carbamate d'ammonium et l'ammoniac avec leur recyclage subséquent dans le réacteur de synthèse (112). Ladite extraction comporte les étapes: de décomposition du carbamate d'ammonium en NH3 et CO2, et de leur revaporisation; et de leur recondensation en carbamate d'ammonium qui est recyclé dans le réacteur de synthèse, le mélange réactif de NH3 et de CO2 étant pompé vers les cycles fonctionnels de décomposition et de revaporisation.
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