公开(公告)号：US20230347258A1

公开(公告)日：2023-11-02

申请号：US18025758

申请日：2021-10-08

Applicant: Yara International ASA

Inventor： Lino Giovanni PORRO ,  Adrian BYNES

IPC: B01D1/30 ,  B01D1/06 ,  B01D19/00 ,  C07C273/16 ,  C07C273/04 ,  B01J4/00

CPC classification number: B01D1/30 ,  B01D1/065 ,  B01D19/0021 ,  C07C273/16 ,  C07C273/04 ,  B01J4/008 ,  B01J4/005 ,  B01J2204/005

Abstract: A bottom chamber of a stripper (or bottom liquid holder) including a vortex breaker, a blocking plate and a guiding plate. A stripper, a urea HP stripper, a urea plant, a method for operating a stripper and a method for producing a solid, particulate urea-based composition.

公开(公告)号：US20220289669A1

公开(公告)日：2022-09-15

申请号：US17633356

申请日：2020-08-20

Applicant: Yara International ASA

Inventor： Adrian BYNES ,  Shreyas AMIN ,  Ruud VAN BELZEN

IPC: C07C273/04 ,  C07C273/16 ,  B01D3/14

Abstract: The invention relates to a method for producing a urea solution with a target urea concentration using water flows recovered from the urea production process. At least part of the water flows recovered from the urea production process are only partially purified to produce the urea solution. The invention further relates to a process condensate treatment plant to implement the method for producing a urea solution with a target urea concentration, and a urea production plant comprising such process condensate treatment plant.