公开(公告)号：EP2521710A1

公开(公告)日：2012-11-14

申请号：EP11701876.2

申请日：2011-01-07

Applicant: Stamicarbon B.V.

Inventor： MENNEN, Johannes Henricus

IPC: C07C273/04

CPC classification number: C07C273/04

Abstract: The invention relates to a process for producing urea wherein an aqueous urea solution, leaving a urea reaction zone is fed to a stripper, where a part of the non-converted ammonia and carbon dioxide is separated from the aqueous urea solution, which solution leaves the stripper to a first recovery section of one or more serial recovery sections and is subsequently fed to one or more urea concentration sections, wherein the urea solution leaving the stripper is subjected to an adiabatic expansion, thus creating a vapor and a liquid, which are separated before the liquid enters a first recovery section and the vapor is condensed. The invention further relates to a urea plant comprising a stripper and a first recovery section, wherein an adiabatic expansion valve and a liquid/gas separator is provided between the stripper and the first recovery section.

公开(公告)号：EP2297093B1

公开(公告)日：2012-07-11

申请号：EP09749834.9

申请日：2009-05-19

Applicant: Stamicarbon B.V.

Inventor： GEVERS, Lambertus Wilhelmus ,  MEESSEN, Jozef Hubert ,  MENNEN, Johannes Henricus

IPC: C07C273/00 ,  C07C273/04

CPC classification number: C07C273/04

Abstract: Process for the production of urea from ammonia and carbon dioxide in a urea plant containing a high-pressure synthesis section comprising at least one reactor section, a stripper and a condenser wherein all the high-pressure equipment is placed in a low position, wherein the height of the high-pressure section is less than 35 m from ground level and at least one of the reactor sections comprises means for the separate distribution of ammonia in the bottom of the reactor section.