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公开(公告)号：US11083976B2
公开(公告)日：2021-08-10
申请号：US15560460
申请日：2016-03-29
Applicant: Stamicarbon B.V.
Inventor： Joey Dobree , Johannes Henricus Mennen
IPC: B01J19/24 , C01C1/18 , C07C273/04 , B01D3/00 , C05C9/00 , C05C1/00 , C07C273/02 , C05G5/23 , 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 prodution, is mixed with ammonium nitrate so as to obtain UAN.
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公开(公告)号：US10376859B2
公开(公告)日：2019-08-13
申请号：US15576214
申请日：2017-03-30
Applicant: STAMICARBON B.V.
IPC: B01J19/00 , B01J19/18 , B01J19/24 , B01D3/06 , B01D3/14 , B01D5/00 , C07C273/04 , C07C275/02 , B01L3/06 , B01L3/14
Abstract: The invention is directed to a urea plant with a high pressure synthesis section and a recovery section. The high pressure synthesis section comprises a reactor, a stripper and a condenser, wherein the reactor operates at a higher pressure than the stripper and the condenser. The plant further includes a compression unit between the condenser and the reactor. The compression unit utilizes mechanical energy recovered from a decompression unit positioned downstream of the stripper and upstream of the recovery section.
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公开(公告)号：US10358413B2
公开(公告)日：2019-07-23
申请号：US15568795
申请日：2016-04-25
Applicant: Stamicarbon B.V.
Inventor： Johannes Henricus Mennen
IPC: C07D251/60 , C07D251/62 , C07C273/12 , B01J19/24
Abstract: Disclosed is an integrated process for the production of urea and melamine, as well as a system for carrying out the process. The invention thereby pertains to an integrated process of the type wherein off-gas obtained from the production of melamine is entered into the process for the production of melamine, by condensation in the presence of water. A typical embodiment thereof is the condensation in the presence of an aqueous carbamate solution obtained from urea recovery. In accordance with the invention, said condensation takes place at a substantially lower pressure than the pressure at which the melamine off-gas is obtained. To this end, the pressure of the off-gas is reduced typically by 2-10 bar. In connection herewith, the system of the invention comprises a pressure reducing unit downstream of an outlet for the melamine off-gas, and upstream of a section for the condensation of the off-gas. The invention also includes a method for the modernization of an integrated system for the production of melamine and urea. This is accomplished by adding the aforementioned pressure reducing unit to a pre-existing system.
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公开(公告)号：US10315925B2
公开(公告)日：2019-06-11
申请号：US15528708
申请日：2015-11-26
Applicant: Stamicarbon B.V.
Abstract: The invention provides a method and a plant for producing urea ammonium nitrate (UAN). The method involves the use of a condensation section, optionally in combination with a medium pressure decomposition section, between the dissociation and neutralization sections. The invention further provides a method of modifying an existing UAN plant. The advantages of the process of the invention are that the emission of CO2 can be reduced, the plant capacity can be increased and the high capital expenditure needed for CO2 compression equipment is reduced.
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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.
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Patent Agency Ranking
公开(公告)号：US09815800B2
公开(公告)日：2017-11-14
申请号：US15106140
申请日：2014-12-16
Applicant: Stamicarbon B.V.
Inventor： Johannes Henricus Mennen
IPC: C07D251/60 , C07D251/62 , C07C273/12 , B01J19/24 , B01J3/04 , B01J4/00 , B01J10/00
CPC classification number: C07D251/60 , B01J19/245 , B01J2219/00103 , B01J2219/24 , C07C273/12 , C07D251/62
Abstract: Disclosed is a process for the integrated production of urea and melamine. A urea production zone produces a urea synthesis stream comprising urea, water and ammonium carbamate. This stream is subjected to processing, preferably involving stripping, so as to separate an aqueous urea stream from residual dissociated carbamate vapor comprising ammonia, carbon dioxide, and water. The urea is fed to a melamine synthesis zone and subjected to melamine forming conditions so as to form melamine and off-gas comprising carbon dioxide and ammonia. The dissociated carbamate vapor and the melamine off-gas are subjected to combined condensation so as to form a dilute melamine off-gas condensate.
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公开(公告)号：US12209061B2
公开(公告)日：2025-01-28
申请号：US17368924
申请日：2021-07-07
Applicant: STAMICARBON B.V.
Inventor： Joey Dobree , Johannes Henricus Mennen
IPC: C07C273/04 , B01D3/00 , B01J19/00 , C01C1/18 , C05C1/00 , C05C9/00 , C05G5/23 , C07C273/02 , C07C273/10 , C07C273/14 , 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.
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公开(公告)号：US09732033B2
公开(公告)日：2017-08-15
申请号：US15246334
申请日：2016-08-24
Applicant: Stamicarbon B.V.
Inventor： Johannes Henricus Mennen , Jozef Hubert Meessen
IPC: C07C273/04 , B01D5/00 , B01D47/00 , B23P15/26 , B01J10/00
CPC classification number: C07C273/04 , B01D5/006 , B01D5/009 , B01D47/00 , B01J10/00 , B23P15/26 , Y10T29/49352
Abstract: Disclosed is a plant for the production of urea. The plant comprises conventional sections for synthesis and recovery, for evaporation and condensation, for urea finishing, and for dust scrubbing. According to the invention, an additional evaporation and condensation loop is introduced from and to the dust scrubbing section. This loop results in a more favorable energy consumption of the plant.
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公开(公告)号：US20150133690A1
公开(公告)日：2015-05-14
申请号：US14398433
申请日：2013-05-02
Applicant: STAMICARBON B.V.
Inventor： Johannes Henricus Mennen , Jozef Hubert Meessen
IPC: C07C273/04 , B01D47/00 , B23P15/26 , B01D5/00
CPC classification number: C07C273/04 , B01D5/006 , B01D5/009 , B01D47/00 , B01J10/00 , B23P15/26 , Y10T29/49352
Abstract: Disclosed is a plant for the production of urea. The plant comprises conventional sections for synthesis and recovery, for evaporation and condensation, for urea finishing, and for dust scrubbing. According to the invention, an additional evaporation and condensation loop is introduced from and to the dust scrubbing section. This loop results in a more favorable energy consumption of the plant.
Abstract translation: 公开了一种用于生产尿素的设备。 该设备包括用于合成和回收的常规部分，用于蒸发和冷凝，用于尿素整理和用于灰尘洗涤。 根据本发明，从灰尘洗涤部分引入附加的蒸发和冷凝环路。 该循环导致植物更有利的能量消耗。
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公开(公告)号：US10829444B2
公开(公告)日：2020-11-10
申请号：US16472792
申请日：2018-07-13
Applicant: STAMICARBON B.V.
Inventor： Juan Coloma González , Johannes Henricus Mennen
Abstract: The invention pertains to a finishing process for urea-comprising material, a plant for finishing urea-comprising material, a method of modifying an existing plant, and a use. Methods are disclosed for preventing the clogging of the conduit for off-gas between the finishing section and the treatment section.
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