Patent ID: 11878957
Assignee: TOYO ENGINEERING CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC C

Claim 4:
5. The process for urea production according to claim 1, wherein
in the high-pressure decomposition step, the urea synthesis solution generated in the synthesis step is heated with use of a medium-pressure steam as a heat source, and a medium-pressure steam condensate is obtained, and
in step a), the steam condensate having a temperature higher than 90° C. is one of:
the medium-pressure steam condensate obtained in the high-pressure decomposition step; or
a medium-pressure steam condensate obtained by cooling, through heat exchange, the medium-pressure steam condensate obtained in the high-pressure decomposition step; or
a medium-low-pressure steam condensate obtained in a medium-low-pressure steam generation step comprising reducing in pressure the medium-pressure steam condensate obtained in the high-pressure decomposition step to a medium-low pressure, generating a medium-low-pressure steam and a medium-low-pressure steam condensate; or
a medium-low-pressure steam condensate obtained by cooling, through heat exchange, the medium-low-pressure steam condensate obtained in the medium-low-pressure steam generation step.