Process for urea production from ammonia and carbon dioxide
AssigneeUrea Casale S.A.
InventorsDomenico Romiti, Paolo Sticchi
Life of this patent
Estimating the term…
Abstract
A process for urea production comprises a first process step in which ammonia (7) and carbon dioxide (6) are obtained, subjecting natural gas (1) to reforming treatments (12, 14), and a second step of urea (8a) production from such ammonia (7) and from carbon dioxide, through a formation of a solution comprising urea and ammonium carbamate in a urea synthesis reactor (20) and a subsequent decomposition of the ammonium carbamate and. urea recovery, the process comprises the steps of:—treating combustion smokes (5) comprising carbon dioxide with an aqueous solution (9a) comprising a part (7b) of such ammonia (7), obtaining an aqueous ammonium carbamate solution (9c);—supplying the solution (9c) thus obtained to the second process step.
Claims7
Process for urea production from ammonia and carbon dioxide comprising a first process step in which ammonia (7) and carbon dioxide (6) are obtained, subjecting natural gas (1) to reforming treatments (12, 14), and a second step of urea (8a) production from said ammonia (7) and from carbon dioxide, through a formation of a solution comprising urea and ammonium carbamate in a urea synthesis reactor (20) and a subsequent decomposition of said ammonium carbamate and urea recovery, characterized in that it comprises the steps of:
- treating combustion smokes (5) comprising carbon dioxide with an aqueous solution (9a) comprising a part (7b) of said ammonia (7), obtaining an aqueous ammonium carbamate solution (9c);
- supplying the solution (9c) thus obtained to said second process step.
Dependencies are inferred from the claim text.