Invention Grant
- Patent Title: Urea production with multiple evaporators
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Application No.: US17424958Application Date: 2020-12-30
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Publication No.: US11332437B2Publication Date: 2022-05-17
- Inventor: Rahul Patil , Petrus Anna Maria Robertus Simons , Branislav Manic
- Applicant: STAMICARBON B.V.
- Applicant Address: NL Sittard
- Assignee: STAMICARBON B.V.
- Current Assignee: STAMICARBON B.V.
- Current Assignee Address: NL Sittard
- Agency: Leason Ellis LLP
- Priority: EP19220084 20191230
- International Application: PCT/NL2020/050826 WO 20201230
- International Announcement: WO2021/137701 WO 20210708
- Main IPC: C07C273/16
- IPC: C07C273/16 ; B01D5/00 ; B01D53/78 ; C02F1/02 ; C02F1/20 ; B01D53/54 ; C02F103/36 ; B01D1/00

Abstract:
A urea production process which includes and a synthesis section, a recovery section and evaporation section and a finishing section wherein the evaporation section includes a first evaporator and downstream thereof a second evaporator for urea solution. The second evaporator operates a lower pressure than the first evaporator to provide a urea melt and second vapor, solidifying the urea melt in a finishing section to provide a solid urea produce and off gas, scrubbing the off gas followed by condensing to produce a first condensate and second condensate; supplying the first condensate to a wastewater treatment section and supply the second condensate to the scrubber wherein the second condensate is used as a scrub liquid in the scrubber.
Public/Granted literature
- US20220089529A1 UREA PRODUCTION WITH MULTIPLE EVAPORATORS Public/Granted day:2022-03-24
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