Invention Grant
- Patent Title: Urea finishing method
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Application No.: US14127962Application Date: 2012-10-12
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Publication No.: US09890115B2Publication Date: 2018-02-13
- Inventor: Johannes Henricus Mennen
- Applicant: Stamicarbon B.V.
- Applicant Address: NL Sittard
- Assignee: STAMICARBON B.V.
- Current Assignee: STAMICARBON B.V.
- Current Assignee Address: NL Sittard
- Agency: Morrison & Foerster LLP
- Priority: EP11185307 20111014
- International Application: PCT/NL2012/050715 WO 20121012
- International Announcement: WO2013/055219 WO 20130418
- Main IPC: C07C273/16
- IPC: C07C273/16 ; C07C273/14 ; B01J2/22 ; B01J2/30 ; B29C43/00 ; C05C9/02 ; C05C9/00 ; B29K75/00

Abstract:
Disclosed is a method for urea finishing. A urea solution is subjected to crystallization and, other than in conventional processes, the urea crystals are shaped by exerting mechanical force onto them. Thus, the conventional prilling or granulation finishing steps can be avoided, and so are the corresponding emissions of ammonia and/or dust. The crystallization comprises a flash crystallization. The invention also pertains to the urea particles obtainable by the process, to a urea plant, and to a method of modifying an existing urea plant.
Public/Granted literature
- US20150026943A1 UREA FINISHING METHOD Public/Granted day:2015-01-29
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