公开(公告)号：US12215071B2

公开(公告)日：2025-02-04

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

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：US20240425449A1

公开(公告)日：2024-12-26

申请号：US18716802

申请日：2023-02-21

Applicant: STAMICARBON B.V.

Inventor： Rahul Patil

IPC: C07C273/04

Abstract: The disclosure pertains to a urea production process wherein carbamate in a medium pressure (MP) urea solution is decomposed in a tube bundle of a high pressure (HP) carbamate condenser and resulting gas is condensed in indirect heat exchange with urea solution to be heated and wherein a high pressure (HP) stripper is preferably operated with relatively low stripping efficiency.

公开(公告)号：US20240391867A1

公开(公告)日：2024-11-28

申请号：US18796708

申请日：2024-08-07

Applicant: NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM ,  SAWAFUJI ELECTRIC CO., LTD. ,  KAWADA INDUSTRIES, INC.

Inventor： Shinji KAMBARA ,  Tomonori Miura ,  Yuya Tanaka ,  Shigeo Takitani ,  Tomokazu Kodera

IPC: C07C273/04

Abstract: A urea production device includes: a body portion; a first electrode disposed inside the body portion; and a second electrode which is disposed such that at least a part thereof faces the first electrode. The urea production device includes a gas flow path formed between the body portion and either the first electrode or the second electrode, a first raw material introduction path having one side connected to the gas flow path and another side connected to a carbon dioxide storage source, and a second raw material introduction path which is a raw material introduction path different from the first raw material introduction path and which has one side connected to the gas flow path and another side connected to an ammonia storage source. A voltage is to be applied between the first electrode and the second electrode and electric discharge can be generated.

公开(公告)号：US12151987B2

公开(公告)日：2024-11-26

申请号：US18256554

申请日：2023-02-14

Applicant: STAMICARBON B.V.

Inventor： Johan Albert Arno Van Den Tillaart ,  Eelco Mostert

IPC: C05C9/00 ,  C05G5/23 ,  C07C273/04 ,  C07C273/16

Abstract: A urea plant and urea production process of the stripping type are provided that are adapted for making Diesel Exhaust Fluid (DEF) or precursor thereof in a DEF production unit downstream of a treatment section. The treatment section receives a part of the urea synthesis stream from a reaction zone, in particular bypassing the HP stripper.

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.