Process for the preparation of urea
AssigneeDsm IP Assets B.V.
InventorsAndreas Johannes Biermans, Kees Jonckers
Life of this patent
Estimating the term…
Abstract
Process for the preparation of urea from ammonia and carbon dioxide in which all or part of the liquid ammonia needed for the process is supplied to the high-pressure scrubber in such a way that it is in direct contact with the other streams supplied to this scrubber. In particular in such a way that there is direct contact between the liquid ammonia and the off-gases transferred to the high-pressure scrubber from the urea synthesis reactor. More in particular in such a way that there is direct contact between the liquid ammonia and the off-gases transferred to the high-pressure scrubber from the urea reactor and with the carbamate stream, which is transferred from the low-pressure urea recovery section.
Claims6
Process for the preparation of urea from ammonia and carbon dioxide, characterized in that all or part of the liquid ammonia needed for the process is supplied to the high-pressure scrubber in such a way that it is in direct contact with the other streams supplied to this scrubber.
Dependencies are inferred from the claim text.