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.

公开(公告)号：US11332437B2

公开(公告)日：2022-05-17

申请号：US17424958

申请日：2020-12-30

Applicant: STAMICARBON B.V.

Inventor： Rahul Patil ,  Petrus Anna Maria Robertus Simons ,  Branislav Manic

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.

公开(公告)号：US20210331086A1

公开(公告)日：2021-10-28

申请号：US17368924

申请日：2021-07-07

Applicant: STAMICARBON B.V.

Inventor： Joey DOBREE ,  Johannes Henricus MENNEN

IPC: B01D3/00 ,  C01C1/18 ,  C05C9/00 ,  C07C273/04 ,  C05C1/00 ,  C07C273/02 ,  C05G5/23 ,  B01J19/24 ,  B01J19/00 ,  C07C273/10 ,  C07C275/02

Abstract: Disclosed is a method for the integrated production of two different urea products. One is an aqueous urea solution suitable for use in NOx abatement (generally indicated as Diesel Exhaust Fluid DEF). The other is a solution used as a fertilizer, viz. Urea Ammonium Nitrate (UAN). The production of DEF and UAN are integrated as follows: ammonia recovered from the production of urea is used as a feed to the production of ammonium nitrate. At least part of an aqueous urea stream from urea production, is mixed with ammonium nitrate so as to obtain UAN.

公开(公告)号：US20210129069A1

公开(公告)日：2021-05-06

申请号：US17141328

申请日：2021-01-05

Applicant: STAMICARBON B.V.

Inventor： Cain Christopher DOHERTY ,  Aloysius Mechteldis Emmanuel SCHOENMAKERS

IPC: B01D47/10 ,  C05C9/00 ,  C07C273/04 ,  C07C273/02 ,  B01D47/05 ,  B01D47/06

Abstract: Disclosed is a method for the removal of urea dust from the off-gas of a finishing section of a urea production plant. the method comprises subjecting the off-gas to quenching with water so as to produce quenched off-gas. The quenched off-gas is subjected to humidification by mixing said quenched gas stream with a humidification fluid selected from (a) saturated steam and (b) superheated steam mixed with a second aqueous stream, so as to produce a humidified gas stream, subjecting said humidified gas stream to particle separation (i.e., dust removal) by means of a scrubbing liquid in which at least part of the particles in the gas stream are soluble.