C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 273/04 (2006.01)
Patent
CA 2569711
The invention relates to a process for the preparation of urea from ammonia and carbon dioxide in a urea plant that contains a high-pressure synthesis section and one or more recovery section(s) at a lower pressure, the high- pressure synthesis section comprising a reactor, a stripper and a condenser, with gases leaving the high-pressure synthesis section being condensed in a medium-pressure condenser at 0.5-12 MPa to which also a carbamate stream from one of the recovery sections is supplied, afteer which at least a part of the formed condensate is supplied to the high-pressure condenser.
L'invention porte sur un procédé de préparation d'urée à partir d'ammoniac et de CO2 dans une installation comprenant une section de synthèse à haute pression et une ou plusieurs sections de récupération à pression moindre. La section de synthèse à haute pression comporte un réacteur, un épuiseur et un condenseur. Les gaz quittant la section de synthèse à haute pression sont condensés dans un condenseur à pression médiane sous 0,5 à 12 Mpa et mélangés à un courant de carbamate provenant d'une des sections de récupération, et une partie du condensât ainsi formé alimente un condenseur à haute pression.
Dsm Ip Assets B.v.
Smart & Biggar
Stamicarbon B.v.
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