| 摘要 |
A process for urea production comprises the steps of:-performing a reaction between ammonia and carbon dioxide in a reaction space to obtain a reaction mixture comprising urea, carbamate and free ammonia in aqueous solution,-subjecting said mixture to a stripping treatment with carbon dioxide feed as a stripping agent to obtain a first flow comprising ammonia and carbon dioxide in vapor phase and a flow comprising urea and residual carbamate in aqueous solution,-feeding said flow comprising urea and residual carbamate in aqueoue solution to a urea recovery section,-separating in said recovery section said residual carbamate from the urea to obtain a first flow of carbamate in aqueous solution.
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