Process and plant for urea production
AssigneeUrea Casale S.A.
InventorsFederico Zardi, Sergio Debernardi
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Abstract
A process for producing urea is disclosed, wherein liquid ammonia and carbon dioxide are reacted in a high-pressure synthesis section (100), and at least part of the carbon dioxide is fed to said synthesis section (100) in liquid phase. A plant operating according to said process and a method for modernizing existing plants accordingly are also disclosed.
Claims13
A process for producing urea, comprising the steps of:
- feeding liquid ammonia and carbon dioxide to a synthesis section comprising at least a reactor, a stripper and a condenser forming a high-pressure loop;
- and
- reacting said liquid ammonia and carbon dioxide in said synthesis section to produce urea,
- wherein at least part of said carbon dioxide is fed to said synthesis section in liquid phase.
A method for improving efficiency of a plant for producing urea, said plant being a self-stripping or CO2-stripping plant comprising at least a synthesis section comprising a reactor, a stripper and a condenser in a high-pressure loop, connected to ammonia feeding means and gaseous carbon dioxide feeding means, said method comprising providing liquid carbon dioxide feeding means connected to said synthesis section.
Dependencies are inferred from the claim text.