公开(公告)号：US20240279165A1

公开(公告)日：2024-08-22

申请号：US18609842

申请日：2024-03-19

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：US12060313B2

公开(公告)日：2024-08-13

申请号：US18007232

申请日：2022-02-22

Applicant: STAMICARBON B.V.

Inventor： Wilhelmus Hubertus Geurts

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

CPC classification number: C07C273/04 ,  B01J10/00 ,  B01J19/0053 ,  B01J19/0086 ,  C01C1/185 ,  B01J2219/00006 ,  B01J2219/0002 ,  B01J2219/00038 ,  B01J2219/00761

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：US20240262787A1

公开(公告)日：2024-08-08

申请号：US18621755

申请日：2024-03-29

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：US12012372B2

公开(公告)日：2024-06-18

申请号：US17802101

申请日：2021-02-09

Applicant: Casale SA

Inventor： Leonardo Marrone ,  Paolo Bertini ,  Matteo Fumagalli

IPC: C07C273/04 ,  B01J19/24

CPC classification number: C07C273/04 ,  B01J19/2465 ,  B01J2219/00162

Abstract: A process for synthesis of urea from ammonia and carbon dioxide wherein: the urea synthesis is performed with a stripping process in a synthesis loop including at least a reactor (1), a stripper (2) and a condenser (3); the reactor effluent is treated in the stripper to remove unreacted ammonia and carbon dioxide; the urea solution (14) from the stripper is sent to a low-pressure recovery section (4); the stripper vapours are split into a first portion (151) directed to the reactor and a second portion (152) sent to the condenser; the condenser (3) is a shell-and-tube kettle condenser where condensation of stripper vapours is performed in the tube side (30); a carbamate-containing effluent (20) from the condenser is returned to the reactor.

公开(公告)号：US20240141466A1

公开(公告)日：2024-05-02

申请号：US18407928

申请日：2024-01-09

Applicant: Sandvik Intellectual Property AB

Inventor： Daniel GULLBERG ,  Christina HARALDSSON ,  Anders WILSON ,  Alexander SCHEERDER ,  Kirk OFEI

IPC: C22C38/44 ,  B01D3/32 ,  B01J19/02 ,  C07C273/04 ,  C21D6/00 ,  C21D8/00 ,  C21D9/08 ,  C22C33/02 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/58 ,  F28F21/08

CPC classification number: C22C38/44 ,  B01D3/32 ,  B01J19/02 ,  C07C273/04 ,  C21D6/004 ,  C21D8/005 ,  C21D9/08 ,  C22C33/0285 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/58 ,  F28F21/083 ,  B22F3/15 ,  C21D2211/001 ,  C21D2211/005

Abstract: A corrosion resistant duplex stainless steel (ferritic austenitic alloy) is suitable for use in a plant for the production of urea. Uses of the corrosion resistant duplex stainless steel include in objects made of said duplex stainless steel, in methods for the production of urea, in a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and in methods of modifying an existing plant for the production of urea. In one aspect, the composition consists of in weight % (wt %): C 0.010 to 0.015; S 0.08 to 0.23; Mn 1.0 to 1.05; Cr 29.07 to 29.92; Ni 5.76 to 7.17; Mo 3.0 to 4.0; W max 2.55; N 0.3 to 0.35; Cu max 0.01; S max 0.008; P max 0.008; at least one of Ti, Nb, Hf, Ca, Ba, V, and B max 0.5 total; balance Fe and unavoidable occurring impurities.

公开(公告)号：US20240092730A1

公开(公告)日：2024-03-21

申请号：US18248902

申请日：2022-12-19

Applicant: STAMICARBON B.V.

Inventor： Johan Albert Arno VAN DEN TILLAART ,  Eelco MOSTERT

IPC: B01D5/00 ,  C07C273/04

CPC classification number: B01D5/0012 ,  C07C273/04

Abstract: The disclosure pertains to a urea plant and process of the thermal stripping type as well as to a method of modifying a urea plant of the thermal stripping type. Provided is a urea plant with a thermal stripper and a high pressure carbamate condenser with a shell space wherein gas from the stripper is condensed in the shell space.

公开(公告)号：US11912649B2

公开(公告)日：2024-02-27

申请号：US17424948

申请日：2020-12-30

Applicant: STAMICARBON B.V.

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

IPC: C07C273/14 ,  C07C273/04 ,  B01D53/00 ,  B01D53/58

CPC classification number: C07C273/14 ,  B01D53/002 ,  B01D53/58 ,  B01D2251/504 ,  B01D2251/506 ,  B01D2257/406 ,  B01D2257/80 ,  C07C273/04

Abstract: Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. Also disclosed is a corresponding urea plant, and a method of accordingly modifying a pre-existing urea plant. In a scrubbing section, the off-gas is brought into contact with an acidic scrubbing liquid so as to provide a scrubbed off-gas and a utilized scrubbing liquid comprising ammonium salt. The method specifies an evaporation section, which is part of the urea plant that produces urea melt, that is divided into first and second stages. The first stage is part of the urea melt production plant. The second stage decoupled, as regards recirculation of liquids other than the urea product stream, from the urea melt production plant. This is accomplished by sending utilized scrubbing liquid that contains ammonium salts to the second stage evaporation section, and by sending condensed vapours from said second stage evaporation section to said scrubbing section.

公开(公告)号：US11873268B2

公开(公告)日：2024-01-16

申请号：US17420025

申请日：2020-03-05

Applicant: Haldor Topsøe A/S

Inventor： Marcus Symreng ,  Pat A. Han

IPC: C07C273/04 ,  C07C29/152 ,  C07C273/10 ,  C07C45/38 ,  C07C29/151 ,  C01C1/04 ,  C01B3/38 ,  C01B3/02

CPC classification number: C07C273/04 ,  C01B3/025 ,  C01B3/382 ,  C01C1/0488 ,  C07C29/152 ,  C07C29/1518 ,  C07C45/38 ,  C07C273/10 ,  C01B2203/0233 ,  C01B2203/0244 ,  C01B2203/0288 ,  C01B2203/0415 ,  C01B2203/0445 ,  C01B2203/0475 ,  C01B2203/061 ,  C01B2203/068 ,  C07C45/38 ,  C07C47/04 ,  C07C29/1518 ,  C07C31/04

Abstract: Parallel co-production process for the production of methanol and urea product from a hydrocarbon containing feed-stock by means of primary and secondary reforming, intermediary methanol and ammonia formation and conversion of the ammonia to urea product and catalytic oxidation of methanol to formaldehyde.

公开(公告)号：US11858882B2

公开(公告)日：2024-01-02

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 ,  B01D3/14 ,  C07C273/16

CPC classification number: C07C273/04 ,  B01D3/143 ,  C07C273/16

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.

公开(公告)号：US11795140B2

公开(公告)日：2023-10-24

申请号：US18006046

申请日：2022-06-10

Applicant: STAMICARBON B.V.

Inventor： Josef Chroust ,  Wilhelmus Hubertus Geurts

IPC: C07C273/04 ,  B01J19/00 ,  B01D3/00 ,  B01D5/00 ,  B01D19/00

CPC classification number: C07C273/04 ,  B01D5/0003 ,  B01D5/0057 ,  B01D19/0036 ,  B01J19/002 ,  B01J2219/00024 ,  B01J2219/00245

Abstract: The disclosure pertains to a urea production plant and process using a high-pressure CO2 stripper, downstream medium-pressure treatment unit and a medium-pressure dissociator receiving urea synthesis solution from the reactor, wherein gas from the treatment unit and dissociator are condensed in a first condenser and off-gas from the synthesis section is condensed separately in a second condenser. A revamping method is also described.