| Title of Invention |
A PROCESS FOR UREA PRODUCTION AS WELL AS TO A PLANT FOR CARRYING OUT SUCH PROCESS |
| Abstract |
The present invention relates to a process for producing urea of the type comprising the steps of reacting ammonia and carbon dioxide in a reaction space (2), obtaining a reaction mixture comprising urea, carbamate and free ammonia in aqueous solution; feeding said reaction mixture to a stripping unit (3) with carbon dioxide and subjecting said mixture to a treatment of partial decomposition of carbamate and partial separation of free ammonia, obtaining a flow comprising ammonia and carbon dioxide in vapour phase and a flow comprising urea and residual carbamate in aqueous solution; feeding said flow comprising urea and residual carbamate in aqueous solution to an urea recovery section; characterised in that it further comprises the steps of feeding a minor portion of said flow comprising ammonia and carbon dioxide in vapour phase directly to said reaction space (2); feeding a major portion of said flow comprising ammonia and carbon dioxide in vapour phase to at least one condensation unit (4) and subjecting such major portion to a substantially total condensation, obtaining a flow comprising urea and carbamate in aqueous solution; feeding said flow comprising urea and carbamate in aqueous solution to said reaction space (2). |
Documents:
6-CHE-2006 ABSTRACT.pdf
6-CHE-2006 CLAIMS.pdf
6-CHE-2006 CORRESPONDENCE OTHERS.pdf
6-CHE-2006 CORRESPONDENCE PO.pdf
6-CHE-2006 DESCRIPTION (COMPLETE).pdf
6-CHE-2006 FORM-18.pdf
6-CHE-2006 FORM-3.pdf
6-CHE-2006 FORM-5.pdf
6-CHE-2006 PETITIONS.pdf
6-CHE-2006 POWER OF ATTORNEY.pdf