公开(公告)号：US2619229A

公开(公告)日：1952-11-25

申请号：US7145249

申请日：1949-01-18

Applicant: STAMICARBON

Inventor： LEEMAN JAN N J

IPC: B03B5/40 ,  B03B11/00

CPC classification number: B03B11/00 ,  B03B5/40 ,  B03B2011/006

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.

公开(公告)号：US20250108349A1

公开(公告)日：2025-04-03

申请号：US18850232

申请日：2023-08-29

Applicant: STAMICARBON B.V.

Inventor： Barbara CUCCHIELLA ,  Juan GONZALEZ COLOMA

IPC: B01J2/16 ,  B01J19/26

Abstract: The disclosure pertains to a fluidized bed granulation process, for instance for urea melt. An embodiment of the process comprises providing a fluidized bed of the particles in a granulation compartment of the fluidized bed granulator; forming a film of the granulation liquid in the form of a hollow conical frustum projecting into the granulation compartment by supplying the granulation liquid through a first channel of a granulation nozzle; supplying secondary gas stream through a secondary gas channel of the granulation nozzle into the granulation compartment, wherein the secondary gas channel is provided as an annulus around the first channel, wherein the exit of the secondary gas channel is directly exposed to the fluidized bed in the granulation compartment, wherein particles from the fluidized bed are entrained in said secondary gas stream.

公开(公告)号：US12240800B2

公开(公告)日：2025-03-04

申请号：US18692124

申请日：2023-11-22

Applicant: Stamicarbon B.V.

Inventor： Branislav Manic ,  Rahul Patil

IPC: B01D1/00 ,  C07C273/12 ,  C07C273/16 ,  C07D251/60

Abstract: Embodiments pertain to a urea plant and to the operation of a urea plant in a reduced load mode. In embodiments, two evaporators in parallel are used, connected to a finishing section respectively to a melamine plant.

公开(公告)号：US12134590B2

公开(公告)日：2024-11-05

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 ,  B01J3/00 ,  B01J3/02 ,  C07D251/60 ,  C07D251/62

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：US12084406B2

公开(公告)日：2024-09-10

申请号：US18069690

申请日：2022-12-21

Applicant: STAMICARBON B.V.

Inventor： Kirk Anguah Ofei ,  Alexander Aleida Antonius Scheerder

IPC: C07C273/04 ,  B01D1/06 ,  B01D3/34 ,  B01J19/00 ,  B01J19/02 ,  B22F7/06 ,  C07C273/16 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/26 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48

CPC classification number: C07C273/04 ,  B01D1/065 ,  B01D3/346 ,  B01J19/0013 ,  B01J19/02 ,  C07C273/16 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/26 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  B01J2219/00081 ,  B01J2219/0286 ,  B22F7/064 ,  B22F2301/35 ,  C21D2211/005

Abstract: The application provides in an aspect a process for producing urea in a urea plant comprising a high pressure synthesis section comprising a reactor, wherein the process comprises reacting NH3 feed and CO2 feed under urea formation conditions in said reactor to form a urea synthesis solution comprising urea, water, carbamate and ammonia, wherein the process further comprises contacting a carbamate-containing liquid stream with an equipment part of said high pressure synthesis section that is made of a ferritic steel alloy.

公开(公告)号：US20240262788A1

公开(公告)日：2024-08-08

申请号：US18293947

申请日：2023-10-13

Applicant: Stamicarbon B.V.

Inventor： Solomon Assefa WASSIE ,  Rahul PATIL

IPC: C07C273/12 ,  B01J19/00 ,  C07C273/04 ,  C07D251/60

CPC classification number: C07C273/12 ,  B01J19/0046 ,  C07C273/04 ,  C07D251/60 ,  B01J2219/00452 ,  B01J2219/00477 ,  B01J2219/00495

Abstract: The disclosure pertains to urea production with, in series, an MP carbamate condenser for condensing at least urea synthesis section off-gas, gas/liquid separation giving a gas stream and a liquid stream, and a second carbamate condenser receiving off-gas from melamine production and said liquid stream.

公开(公告)号：US11958792B2

公开(公告)日：2024-04-16

申请号：US18447469

申请日：2023-08-10

Applicant: STAMICARBON B.V.

Inventor： Wilhelmus Hubertus Geurts

IPC: C07C273/04 ,  B01D5/00 ,  B01J3/02 ,  B01J3/04

CPC classification number: C07C273/04 ,  B01D5/0075 ,  B01J3/02 ,  B01J3/042

Abstract: The disclosure pertains to a urea production plant and process using a thermal stripper, wherein the reaction mixture is separated in two parts, wherein the first part is supplied at least in part to the thermal stripper and the second part at least in part bypasses the thermal stripper and is supplied to a medium pressure recovery section.

公开(公告)号：US11746084B2

公开(公告)日：2023-09-05

申请号：US17624716

申请日：2020-07-03

Applicant: STAMICARBON B.V.

Inventor： Kirk Anguah Ofei ,  Alexander Aleida Antonius Scheerder

IPC: C07C273/04 ,  C07C273/16 ,  B01D1/06 ,  B01D3/34 ,  B01J19/00 ,  B01J19/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/26 ,  B22F7/06

CPC classification number: C07C273/04 ,  B01D1/065 ,  B01D3/346 ,  B01J19/0013 ,  B01J19/02 ,  C07C273/16 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/26 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  B01J2219/00081 ,  B01J2219/0286 ,  B22F7/064 ,  B22F2301/35 ,  C21D2211/005

Abstract: The application provides in an aspect a process for producing urea in a urea plant comprising a high pressure synthesis section comprising a reactor, wherein the process comprises reacting NH3 feed and CO2 feed under urea formation conditions in said reactor to form a urea synthesis solution comprising urea, water, carbamate and ammonia, wherein the process further comprises contacting a carbamate-containing liquid stream with an equipment part of said high pressure synthesis section that is made of a ferritic steel alloy.

公开(公告)号：US20230265051A1

公开(公告)日：2023-08-24

申请号：US18007232

申请日：2022-02-22

Applicant: STAMICARBON B.V.

Inventor： Wilhelmus Hubertus GEURTS

IPC: C07C273/04 ,  B01J10/00 ,  B01J19/00 ,  C01C1/18

CPC classification number: C07C273/04 ,  B01J10/00 ,  B01J19/0086 ,  C01C1/185 ,  B01J2219/00006 ,  B01J2219/00038

Abstract: Some embodiments of the disclosure pertain to a plant and a process for producing a urea-containing product. The plant comprises a medium pressure dissociation unit and a high pressure CO2 stripper each receiving a part of the urea synthesis solution. Stripped urea solution is further treated in a medium pressure treatment unit.