PROCESS FOR THE PRODUCTION OF FORMALDEHYDE-STABILISED UREA
    2.
    发明申请
    PROCESS FOR THE PRODUCTION OF FORMALDEHYDE-STABILISED UREA 审中-公开
    生产甲醛稳定的尿素的方法

    公开(公告)号:WO2018078318A1

    公开(公告)日:2018-05-03

    申请号:PCT/GB2017/052965

    申请日:2017-10-03

    Abstract: An integrated process for the production of a formaldehyde-stabilised urea is described comprising the steps of: (a) generating a synthesis gas comprising hydrogen, nitrogen, carbon monoxide, carbon dioxide and steam in a synthesis gas generation unit; (b) dividing the synthesis gas into a first synthesis gas stream and a smaller second synthesis gas stream; (c) subjecting the first synthesis gas stream to one or more stages of water-gas shift in one or more water-gas shift reactors to form a shifted gas; (d) cooling the shifted gas to below the dew point and recovering condensate to form a dried shifted gas; (e) recovering carbon dioxide from the dried shifted gas in a carbon dioxide removal unit to form a carbon dioxide-depleted synthesis gas; (f) subjecting the carbon dioxide-depleted synthesis gas to a stage of methanation in one or more methanation reactors to form an ammonia synthesis gas; (g) synthesising ammonia from the ammonia synthesis gas in an ammonia production unit and recovering the ammonia; (h) reacting a portion of the ammonia and at least a portion of the recovered carbon dioxide stream in a urea production unit to form a urea stream; and (i) stabilising the urea by mixing the urea stream and a stabiliser prepared using formaldehyde to form a stabilised urea, wherein the formaldehyde is generated by steps comprising; (1) passing the second portion of synthesis gas through a scrubber to remove contaminants therefrom and form a scrubbed synthesis gas; (2) synthesising methanol from the scrubbed synthesis gas in a methanol synthesis unit, and recovering the methanol and a methanol synthesis off-gas; (3) combining the methanol synthesis off-gas with the shifted gas and (4) subjecting at least a portion of the recovered methanol to oxidation with air in a formaldehyde stabiliser production unit to produce formaldehyde.

    Abstract translation: 描述了一种用于生产甲醛稳定的尿素的综合方法,其包括以下步骤:(a)在合成气体中生成包含氢气,氮气,一氧化碳,二氧化碳和蒸汽的合成气体 发电单位; (b)将合成气分成第一合成气流和较小的第二合成气流; (c)使第一合成气流在一个或多个水煤气变换反应器中经历一个或多个水煤气变换阶段以形成变换气体; (d)将转化的气体冷却至露点以下并回收冷凝物以形成干燥的转化气体; (e)在二氧化碳脱除单元中从干燥的转化气体中回收二氧化碳以形成贫二氧化碳的合成气; (f)使贫二氧化碳合成气在一个或多个甲烷化反应器中进行甲烷化阶段以形成氨合成气; (g)在氨生产装置中从氨合成气合成氨并回收氨; (h)使一部分氨和至少一部分回收的二氧化碳流在尿素生产单元中反应以形成尿素流; 和(i)通过混合尿素流和使用甲醛制备的稳定剂以形成稳定的脲来稳定尿素,其中所述甲醛通过以下步骤产生: (1)使合成气的第二部分通过洗涤器以从其中除去污染物并形成洗涤过的合成气; (2)在甲醇合成装置中从洗涤过的合成气合成甲醇,并回收甲醇和甲醇合成废气; (3)将甲醇合成废气与变换气体合并,以及(4)使至少一部分回收的甲醇在空气中在甲醛稳定剂生产单元中氧化以产生甲醛。

    REMOVAL OF DUST IN UREA FINISHING
    4.
    发明申请
    REMOVAL OF DUST IN UREA FINISHING 审中-公开
    去除尿素处理中的污垢

    公开(公告)号:WO2015002535A1

    公开(公告)日:2015-01-08

    申请号:PCT/NL2014/050445

    申请日:2014-07-04

    CPC classification number: B01D47/10 B01D47/06 C07C273/02

    Abstract: Disclosed is a method for the removal of urea dust from the off- gas of a finishing section (1) of a urea production plant, the method comprises subjecting the off-gas to quenching with water (06) so as to produce quenched off-gas, and subjecting the quenched off-gas to scrubbing using at least one venturi scrubber (11). As a result, a lower pressure drop over the scrubber is attained, and a more efficient growth of urea particles, facilitating the removal thereof.

    Abstract translation: 公开了一种从尿素生产设备的精加工部分(1)的废气中除去尿素灰尘的方法,该方法包括使废气用水淬火(06),以产生骤冷的, 气体,并使用至少一个文丘里洗涤器(11)对骤冷的废气进行洗涤。 因此,可以获得比洗涤器更低的压降,更有效地生长尿素颗粒,便于其去除。

    VERWENDUNG EINER HARNSTOFFZUSAMMENSETZUNG ZUR HERSTELLUNG VON DIESEL EXHAUST FLUID (AUS 32)
    8.
    发明申请
    VERWENDUNG EINER HARNSTOFFZUSAMMENSETZUNG ZUR HERSTELLUNG VON DIESEL EXHAUST FLUID (AUS 32) 审中-公开
    用于制造柴油机排气流体的尿素组合物的使用(来自32)

    公开(公告)号:WO2018011327A1

    公开(公告)日:2018-01-18

    申请号:PCT/EP2017/067657

    申请日:2017-07-13

    Abstract: Verfahren zur Herstellung einer NO x -Reduktionsmittel AUS 32 Lösung (Diesel Exhaust Fluid) umfassend mindestens das Mischen von Wasser und einer partikelförmige Zusammensetzung enthaltend (i) Harnstoff; und ein Additiv umfassend Komponente (ii): (ii) Kombination aus wenigstens einem Amino-Gruppen enthaltenden Polymer oder Oligomer und wenigstens einer funktionalisiertem Polyvinylverbindung; wobei der Gewichtsanteil der Komponente (i) in der partikelförmigen Zusammensetzung > 60 Gew.-% und der Gewichtsanteil der Komponente (ii) in der partikelförmigen Zusammensetzung

    Abstract translation: 用于制备NO x还原溶剂的方法至少包括水和含有(i)尿素的颗粒组合物的混合物 ; 和包含组分(ii)的添加剂:(ii)至少一种含氨基的聚合物或低聚物和至少一种官能化的聚乙烯基化合物的组合; 其中颗粒组合物中组分(i)的重量比例> 60重量%和组分(ii)在颗粒组合物中的重量比例< 1重量%,并且其中获得尿素溶液并且所得到的尿素溶液中组分(i)的重量比例为31重量%至34重量%

    INTEGRATED PRODUCTION OF UREA FOR DIESEL EXHAUST FLUID AND UREA AMMONIUM NITRATE
    9.
    发明申请
    INTEGRATED PRODUCTION OF UREA FOR DIESEL EXHAUST FLUID AND UREA AMMONIUM NITRATE 审中-公开
    集成生产柴油排放液和尿素硝酸铵尿素

    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

    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。

    AN APPARATUS AND METHOD FOR PARTICULATE CAPTURE FROM GAS STREAMS AND A METHOD OF REMOVING SOLUBLE PARTICULATE FROM A GAS
    10.
    发明申请
    AN APPARATUS AND METHOD FOR PARTICULATE CAPTURE FROM GAS STREAMS AND A METHOD OF REMOVING SOLUBLE PARTICULATE FROM A GAS 审中-公开
    从气体流中分离捕获的装置和方法以及从气体中去除可溶性颗粒物的方法

    公开(公告)号:WO2015072854A1

    公开(公告)日:2015-05-21

    申请号:PCT/NL2014/050784

    申请日:2014-11-14

    Abstract: Disclosed is a method for the removal of soluble particulate matter from a gas stream, such as urea dust from the off-gas of a finishing section of a urea production plant. The method comprises subjecting the off-gas to at least two quenching stages an aqueous quenching liquid. The quenching liquid used in a first, upstream quench stage, is allowed to have a higher concentration of dissolved particulate matter than the quenching liquid in the second, downstream quench stage. The quenched gas is led through a particle capture zone, typically comprising one or more of a wet scrubber, a Venturi scrubber, and a wet electrostatic precipitator.

    Abstract translation: 公开了从尿素生产设备的精加工部分的废气中除去可溶性颗粒物质的方法,例如来自气流的尿素粉尘。 该方法包括使废气进入至少两个淬火阶段的水性骤冷液。 在第一,上游骤冷阶段中使用的淬火液体比第二,下游骤冷阶段中的淬火液体具有更高的溶解颗粒物质浓度。 骤冷气体通过颗粒捕集区,通常包括一个或多个湿式洗涤器,文丘里洗涤器和湿静电除尘器。

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