公开(公告)号：WO2019013639A1

公开(公告)日：2019-01-17

申请号：PCT/NL2018/050484

申请日：2018-07-13

Applicant: STAMICARBON B.V.

Inventor： COLOMA GONZÁLEZ, Juan ,  MENNEN, Johannes Henricus

IPC: C07C273/16 ,  C07C273/02

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.

公开(公告)号：WO2016153354A8

公开(公告)日：2016-09-29

申请号：PCT/NL2016/050213

申请日：2016-03-29

Applicant: STAMICARBON B.V.

Inventor： DOBREE, Joey ,  MENNEN, Johannes Henricus

IPC: C01C1/18 ,  C05C9/00 ,  C07C273/04 ,  C07C273/02 ,  C07C275/02 ,  B01D3/00 ,  B01J19/00

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：WO2016153354A9

公开(公告)日：2016-09-29

申请号：PCT/NL2016/050213

申请日：2016-03-29

Applicant: STAMICARBON B.V.

Inventor： DOBREE, Joey ,  MENNEN, Johannes Henricus

IPC: C01C1/18 ,  C05C9/00 ,  C07C273/04 ,  C07C273/02 ,  C07C275/02 ,  B01D3/00 ,  B01J19/00

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.

Abstract translation: 公开了一种用于集成生产两种不同尿素产品的方法。 一种是适合用于NOx减少的尿素水溶液（通常表示为柴油机排气流体 - DEF）。 另一种是用作肥料的溶液，即， 尿素硝酸铵（UAN）。 DEF和UAN的生产结合如下：从尿素生产中回收的氨用作生产硝酸铵的饲料。 至少部分来自尿素生产的尿素水流与硝酸铵混合以获得UAN。

公开(公告)号：WO2016010432A1

公开(公告)日：2016-01-21

申请号：PCT/NL2015/050523

申请日：2015-07-16

Applicant: STAMICARBON B.V.

Inventor： MENNEN, Johannes Henricus

IPC: B01D9/00 ,  C07C273/16 ,  C07C275/02

CPC classification number: C07C273/16 ,  B01D9/0022 ,  B01D21/262 ,  C07C275/02

Abstract: Disclosed is a process for the preparation of a urea product suitable for being diluted with water so as to form an aqueous urea comprising solution for use in a unit for the reduction of NOx in combustion engine exhaust gases, also known as Diesel Exhaust Fluid (DEF) or to be used in De NOx systems of exhaust vapor from industrial furnaces. The process comprises obtaining an aqueous urea solution from or after a recovery section in a urea production process. This solution, which has a low content of impurities, is subjected to flash crystallization at a low pressure, so as to obtain a solid crystallized urea containing product, which is a free-flowing powder containing less than 0.2 wt.% water. This product is packaged under conditions such that the water content in the packaged product is maintained below 0.2 wt.%. The invention can also be used in a method of increasing the capacity of an existing urea plant.

Abstract translation: 公开了一种用于制备适于用水稀释的尿素产品的方法，以形成用于减少内燃机废气中的NOx的单元中的含水尿素，其也被称为柴油排放液（DEF ）或用于来自工业炉的废气蒸气的De NOx系统。 该方法包括在尿素生产过程中从回收部分中或之后获得尿素水溶液。 这种具有低杂质含量的溶液在低压下进行闪蒸结晶，从而获得含有小于0.2重量％水的自由流动粉末的固体结晶含尿素产品。 该产品在包装产品中的含水量保持在0.2重量％以下的条件下包装。 本发明也可用于增加现有尿素装置的容量的方法。

公开(公告)号：WO2016171562A1

公开(公告)日：2016-10-27

申请号：PCT/NL2016/050291

申请日：2016-04-25

Applicant: STAMICARBON B.V.

Inventor： MENNEN, Johannes Henricus

IPC: C07C273/12

CPC classification number: C07C273/12 ,  B01J19/245 ,  B01J2219/00024 ,  B01J2219/24 ,  C07D251/60 ,  Y02P20/125

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.

Abstract translation: 公开了用于生产尿素和三聚氰胺的综合方法，以及用于进行该方法的系统。 因此，本发明涉及一种其中由三聚氰胺生产得到的废气通过在水存在下的冷凝进入生产三聚氰胺的方法的综合方法。 其典型的实施方案是在由尿素回收获得的氨基甲酸铵水溶液存在下进行缩合。 根据本发明，所述冷凝以比获得三聚氰胺废气的压力低得多的压力进行。 为此，废气的压力通常降低2-10巴。 与此相关的是，本发明的系统包括用于三聚氰胺废气的出口下游的减压单元，以及用于废气冷凝的部分的上游。 本发明还包括一种用于生产三聚氰胺和尿素的综合系统现代化的方法。 这是通过将上述减压单元添加到预先存在的系统来实现的。

公开(公告)号：WO2015093942A1

公开(公告)日：2015-06-25

申请号：PCT/NL2014/050863

申请日：2014-12-16

Applicant: STAMICARBON B.V.

Inventor： MENNEN, Johannes Henricus

IPC: C07D251/60 ,  C07C273/12

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.

Abstract translation: 公开了一种尿素和三聚氰胺的综合生产方法。 尿素生产区产生包含尿素，水和氨基甲酸铵的尿素合成流。 对该料流进行处理，优选包括汽提，以便将含水的尿素流与包含氨，二氧化碳和水的残留的解离的氨基甲酸酯蒸气分离。 将尿素进料到三聚氰胺合成区，并进行三聚氰胺形成条件，以形成包含二氧化碳和氨的三聚氰胺和废气。 解离的氨基甲酸盐蒸气和三聚氰胺废气经过联合冷凝，以形成稀的三聚氰胺废气冷凝物。

公开(公告)号：WO2013055219A1

公开(公告)日：2013-04-18

申请号：PCT/NL2012/050715

申请日：2012-10-12

Applicant: STAMICARBON B.V.

Inventor： MENNEN, Johannes Henricus

IPC: C07C273/16 ,  C07C273/02 ,  B01J2/22

CPC classification number: C07C273/16 ,  B01J2/22 ,  B01J2/30 ,  B29C43/006 ,  B29K2075/02 ,  C05C9/005 ,  C05C9/02 ,  C07C273/14 ,  Y10T29/49716

Abstract: Disclosed is a method for urea finishing. A urea solution is subjected to crystallization and, other than in conventional processes, the urea crystals are shaped by exerting mechanical force onto them. Thus, the conventional prilling or granulation finishing steps can be avoided, and so are the corresponding emissions of ammonia and/or dust. The crystallization comprises a flash crystallization. The invention also pertains to the urea particles obtainable by the process, to a urea plant, and to a method of modifying an existing urea plant.

Abstract translation: 公开了一种尿素整理方法。 尿素溶液进行结晶，除了常规方法之外，尿素晶体通过对其施加机械力而成形。 因此，可以避免常规的造粒或造粒整理步骤，氨和/或粉尘的相应排放也是如此。 结晶包括闪晶结晶。 本发明还涉及通过该方法获得的尿素颗粒，尿素装置以及改进现有尿素装置的方法。

公开(公告)号：WO2012134288A1

公开(公告)日：2012-10-04

申请号：PCT/NL2012/050207

申请日：2012-03-30

Applicant: STAMICARBON B.V. ,  MENNEN, Johannes Henricus ,  CUCCHIELLA, Barbara

Inventor： MENNEN, Johannes Henricus ,  CUCCHIELLA, Barbara

IPC: C07C273/04 ,  B01J19/24

CPC classification number: C07C273/04 ,  B01J19/24

Abstract: Disclosed is a method for the production of urea allowing a substantial reduction, even down to zero, of the continuous emission of ammonia conventionally resulting from such a process. According to a preferred embodiment of the invention, the urea-forming reaction from carbon dioxide and ammonia is conducted in a synthesis section that does not require passivation by oxygen. As a result of the absence of oxygen, a hydrogen-rich gas stream results from the synthesis section, that can be used as a fuel in an incinerator. In the incinerator, ammonia-comprising gas streams from the urea production process are combusted.

Abstract translation: 公开了用于生产尿素的方法，其允许通常由这种方法产生的氨的连续排放的显着降低甚至降低至零。 根据本发明的优选实施方案，来自二氧化碳和氨的脲形成反应在不需要氧钝化的合成部分中进行。 由于不存在氧气，可以从合成部分产生富氢气流，其可以在焚烧炉中用作燃料。 在焚烧炉中，来自尿素生产过程的含氨气流被燃烧。

公开(公告)号：WO2011084060A1

公开(公告)日：2011-07-14

申请号：PCT/NL2011/050012

申请日：2011-01-07

Applicant: STAMICARBON B.V. ,  MENNEN, Johannes Henricus

Inventor： MENNEN, Johannes Henricus

IPC: C07C273/04

CPC classification number: C07C273/04

Abstract: The invention relates to a process for producing urea wherein an aqueous urea solution, leaving a urea reaction zone is fed to a stripper, where a part of the non-converted ammonia and carbon dioxide is separated from the aqueous urea solution, which solution leaves the stripper to a first recovery section of one or more serial recovery sections and is subsequently fed to one or more urea concentration sections, wherein the urea solution leaving the stripper is subjected to an adiabatic expansion, thus creating a vapor and a liquid, which are separated before the liquid enters a first recovery section and the vapor is condensed. The invention further relates to a urea plant comprising a stripper and a first recovery section, wherein an adiabatic expansion valve and a liquid/gas separator is provided between the stripper and the first recovery section.

Abstract translation: 本发明涉及生产尿素的方法，其中留下尿素反应区的尿素水溶液被供给到汽提器，其中一部分未转化的氨和二氧化碳与尿素水溶液分离，该溶液离开 汽提器连接到一个或多个连续回收部分的第一回收部分，并且随后被供给到一个或多个尿素浓缩部分，其中离开汽提器的尿素溶液经受绝热膨胀，从而产生蒸气和液体，其被分离 在液体进入第一回收部分并且蒸气冷凝之前。 本发明还涉及一种包括汽提器和第一回收部分的尿素设备，其中绝热膨胀阀和液/气分离器设置在汽提器和第一回收部分之间。

公开(公告)号：WO2017171546A1

公开(公告)日：2017-10-05

申请号：PCT/NL2017/050196

申请日：2017-03-30

Applicant: STAMICARBON B.V.

Inventor： COLOMA GONZÁLEZ, Juan ,  DIELTJENS, Luc Louis Maria ,  MENNEN, Johannes Henricus

IPC: C07C273/04 ,  B01J19/24

Abstract: Disclosed is a urea plant wherein, in deviation from conventional plants, a high-pressure synthesis section is operated with two different pressures. The synthesis section comprises a reactor, which is operated under a first high pressure. The synthesis section also comprises a stripper and a condenser, both operated at substantially the same second high pressure. In accordance with the invention, the first pressure is substantially higher than the second pressure. The disclosed plant particularly comprises a compression unit capable of converting a pressure difference into work, or more specifically, mechanical energy for compression. This compression unit is positioned between a liquid outlet of the condenser and a liquid inlet of the reactor, and in fluid communication therewith. In order to make use of a pressure drop (expansion as a result of a liquid being depressurized), said compression unit is configured to obtain compression energy from one or more events in the urea production process ( i.e. , at one or more points in the urea production plant), at which a loss of energy occurs, such as decompression of a high energy stream. Typically, the compression unit is thereby configured to utilize mechanical energy recovered from a decompression unit positioned downstream of the stripper and upstream of the recovery section.

Abstract translation: 公开了一种尿素装置，其中与常规装置不同，高压合成段在两种不同的压力下操作。 合成部分包括在第一高压下操作的反应器。 合成部分还包括汽提器和冷凝器，二者均在基本上相同的第二高压下操作。 根据本发明，第一压力显着高于第二压力。 所公开的设备特别包括能够将压力差转换成功的压缩单元，或者更具体地说，包括用于压缩的机械能。 该压缩单元位于冷凝器的液体出口和反应器的液体入口之间并与其流体连通。 为了利用压降（由于液体被减压而引起的膨胀），所述压缩单元被配置为从尿素生产过程中的一个或多个事件获得压缩能量（即， 在尿素生产厂中的一个或多个点），在该点发生能量损失，例如高能量流的减压。 典型地，压缩单元因此被配置成利用从位于汽提器下游和回收段上游的减压单元回收的机械能。