公开(公告)号：US20240270685A1

公开(公告)日：2024-08-15

申请号：US18688914

申请日：2023-11-22

Applicant: Stamicarbon B.V.

Inventor： Rahul PATIL ,  Johannes Henricus MENNEN ,  Lambertus Wilhelmus GEVERS

IPC: C07C273/12 ,  C07D251/60

CPC classification number: C07C273/12 ,  C07D251/60

Abstract: The disclosure pertains to a coupled plant process for the production of urea and melamine, with a urea synthesis section with HP CO2 stripping, and with a part of the CO2 feed supplied to a recovery section.

公开(公告)号：US20240261751A1

公开(公告)日：2024-08-08

申请号：US18578192

申请日：2023-05-12

Applicant: Stamicarbon B.V.

Inventor： Rahul PATIL ,  Lambertus Wilhelmus GEVERS ,  Markus Theodorus Marie Michaël WAGEMANS

IPC: B01J19/00 ,  B01J4/00 ,  C07C273/04

CPC classification number: B01J19/0013 ,  B01J4/001 ,  B01J19/006 ,  C07C273/04 ,  B01J2208/00176 ,  B01J2208/00194 ,  B01J2208/00256 ,  B01J2219/00081

Abstract: The disclosure pertains to a high pressure carbamate condensation apparatus for a urea plant, a urea plant, and a urea production method. The apparatus comprises a first U-shaped tube bundle arranged around a second U-shaped tube bundle.

公开(公告)号：US20250162983A1

公开(公告)日：2025-05-22

申请号：US18877886

申请日：2024-09-06

Applicant: Stamicarbon B.V.

Inventor： Rahul PATIL ,  Lambertus Wilhelmus GEVERS ,  Chuanbo GAO

IPC: C07C273/16 ,  C05C1/00 ,  C05G5/20

Abstract: The disclosure pertains to a urea production process wherein vapor from an evaporation unit for concentrating urea solution is condensed and the resulting process condensate, which contains urea originating from urea entrained in the vapor, is combined with a second urea solution to obtain a dilute urea solution that is suitable e.g. for DEF.