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    Method for incorporating micronutrients in the outer shell of urea-based particles
    12.
    发明授权
    Method for incorporating micronutrients in the outer shell of urea-based particles 有权

    公开(公告)号：US10106470B2

    公开(公告)日：2018-10-23

    申请号：US15122760

    申请日：2015-03-03

    Applicant: YARA INTERNATIONAL ASA

    Inventor： Francois Ledoux

    IPC: C05C9/00 ,  C05G3/00 ,  C05D9/02

    Abstract: The invention concerns a method for incorporating micronutrients in an outer shell of urea-based particles, characterized in that it comprises the steps of a) applying a liquid concentrated mineral acid with a water content of at most 25 weight % to urea-based particles having a water content of at most 2 weight %, in order to at least form a double salt layer at the outer surface of the urea-based particles such that an acidified particle grasping layer is obtained, and subsequently b) applying a solid mineral base in powder form to the urea-based particles of step a) in order to react with the grasping layer of the urea-based particles; wherein the mineral acid or the solid mineral base are the source of any one of the micronutrients and wherein the liquid concentrated mineral acid and the solid mineral base in powder form are applied in a non-equimolar ratio between 0.1 and 1 mol/mol mineral acid/mineral base. The invention furthermore concerns a particulate urea-based fertilizer, comprising urea-based particles with a water content of at most 2 weight %, comprising micronutrients in an outer shell, the urea-based particles being obtained by a method according to the invention.

    Method and device for processing of granules
    13.
    发明授权
    Method and device for processing of granules 有权

    公开(公告)号：US09527104B2

    公开(公告)日：2016-12-27

    申请号：US14270620

    申请日：2014-05-06

    Applicant: Yara International ASA

    Inventor： Francois Ledoux ,  Luc Vanmarcke ,  Howard Volke ,  Peter de Bakker ,  Remco de Fouw ,  Roeland Elderson

    IPC: B05B17/00 ,  B05C13/02 ,  B05C9/12 ,  B01J2/16 ,  B05C3/02

    CPC classification number: B05C9/12 ,  B01J2/16 ,  B05C3/02

    Abstract: A method for processing of granules, by forming at least one injection zone in a fluidized bed where a feed stream of seed particles is contacted or coated by a liquid product by simultaneous injection of the feed stream of the seed particles and a feed stream of the liquid product, forming at least one granulation zone in the fluidized bed where the contacted or coated seed particles may be at least one of dried, shaped, and cooled to form granules, extracting the granules from the at least one granulation zone and sorting the extracted granules into undersize granules, on-size granules, and oversize granules, passing the on-size granules to post-processing treatment, removing the oversize granules, and passing the undersize granules back into the feed stream of the seed particles, wherein the extracted granules are made to pass through at least one classifier located in the at least one granulation zone.

    UREA PASSIVATION TECHNIQUE AND NEW PRODUCT PASSIVATED UREA, TO MAKE UREA OR UREA-BASED COMPOUND UNIVERSALLY BLENDABLE
    14.
    发明申请
    UREA PASSIVATION TECHNIQUE AND NEW PRODUCT PASSIVATED UREA, TO MAKE UREA OR UREA-BASED COMPOUND UNIVERSALLY BLENDABLE 有权
    尿素通气技术和新产品经过尿液，以尿素或尿素为基础的化合物通用

    公开(公告)号：US20150210604A1

    公开(公告)日：2015-07-30

    申请号：US14422937

    申请日：2013-08-28

    Applicant: Yara International ASA

    Inventor： Francois Ledoux

    IPC: C05G3/00 ,  C05C1/00 ,  C05C9/00

    CPC classification number: C05G3/0041 ,  C05B1/02 ,  C05C1/00 ,  C05C9/00 ,  C05C9/005 ,  C05G3/0088 ,  C07C273/14 ,  C05C5/00 ,  C05C5/04 ,  C05D5/00

    Abstract: The invention concerns a method of producing passivated urea or urea based compounds for fertilizer blends wherein the urea particles are treated with a mineral acid that reacts with urea and creates a grasping layer. Thereafter a solid base in powder form is added in excess to the particles to coat the acidified particle surface. The invention also concerns a fertilizer blend comprising the passivated urea or urea based compounds with one or more of AN or AN-based compound, NS products, superphosphates, and more generally with a priori most compounds that urea is susceptible to react with when in direct contact. A safe blend comprises more than 40 weight % of the passivated urea.

    Abstract translation: 本发明涉及一种生产用于肥料混合物的钝化的脲或脲基化合物的方法，其中用与尿素反应的无机酸处理尿素颗粒并产生抓握层。 此后将粉末形式的固体碱过量加入到颗粒中以涂覆酸化的颗粒表面。 本发明还涉及一种肥料混合物，其包含钝化的脲或脲基化合物与一种或多种AN或AN-基化合物，NS产物，过磷酸盐，更通常与先前的大多数化合物一起，尿素易于与直接反应 联系。 安全混合物包含超过40重量％的钝化尿素。

    Anti-caking properties of ammonium nitrate particles that are stored in a closed container
    15.
    发明授权
    Anti-caking properties of ammonium nitrate particles that are stored in a closed container 有权

    公开(公告)号：US11135559B2

    公开(公告)日：2021-10-05

    申请号：US16495195

    申请日：2018-06-22

    Applicant: YARA INTERNATIONAL ASA

    Inventor： Francois Ledoux

    IPC: C05C1/00 ,  C05C1/02 ,  B01J2/30 ,  B01J20/04 ,  C01C1/18

    Abstract: The present application relates to a closed container containing ammonium nitrate (AN) particles in an amount of 91 to 99.75 weight % and desiccant in an amount of 0.25 and 9 weight %, wherein the AN particles have a water content of between 0 and 0.7 weight %, and the desiccant particles comprise between 50 and 95 weight % of AN and between 5 and 50 weight % of magnesium nitrate dispersed in the AN. The application furthermore relates to a method for producing of ammonium nitrate particles that are stored in a closed container and having improved anti-caking properties.

    IMPROVED UREA-BASED COMPOSITION COMPRISING ELEMENTAL SULPHUR AND METHOD FOR THE MANUFACTURE THEREOF
    16.
    发明申请
    IMPROVED UREA-BASED COMPOSITION COMPRISING ELEMENTAL SULPHUR AND METHOD FOR THE MANUFACTURE THEREOF 审中-公开

    公开(公告)号：US20190225557A1

    公开(公告)日：2019-07-25

    申请号：US16328294

    申请日：2017-10-13

    Applicant: YARA INTERNATIONAL ASA

    Inventor： Filip Colpaert ,  Francois Ledoux ,  Ruud Van Belzen

    IPC: C05G3/08 ,  C05C9/00 ,  A23K50/15

    Abstract: The invention relates to a homogeneous, solid, particulate, urea-based composition comprising elemental sulphur and a urease inhibitor of the type phosphoric triamide, wherein the urea-based composition comprising elemental sulphur is further characterized in that one or more of the following measures applies: a) it comprises 5 weight % or less, relative to the total weight of the composition, of one or more alkaline or alkaline-forming inorganic or organic compounds; or b) it comprises an anticaking and/or moisture-repellent coating. The composition according to the invention has improved properties for reducing ammonia loss by urease activity in the soil and is in particular suitable as a fertilizer. The invention further relates to a method for the manufacture of a homogeneous, solid, particulate urea-based composition comprising urea, elemental sulphur and a urease inhibitor of the type phosphoric triamide, in particular N-(n-butyl) thiophosphoric triamide (nBTPT), as well as to a composition of kit of parts comprising: a) one or more alkaline or alkaline-forming inorganic or organic compounds; b) the urease inhibitor of the type phosphoric triamide in solid particulate or a liquid form, preferably wherein the urease inhibitor is N-(n-butyl) thiophosphoric triamide (nBTPT); c) optionally, one or more anticaking and/or moisture-repellent compounds.

    Method for providing an inorganic coating to ammonium nitrate-based particles
    17.
    发明授权
    Method for providing an inorganic coating to ammonium nitrate-based particles 有权

    公开(公告)号：US10167236B2

    公开(公告)日：2019-01-01

    申请号：US15122756

    申请日：2015-03-03

    Applicant: YARA INTERNATIONAL ASA

    Inventor： Francois Ledoux

    IPC: C09D1/00 ,  C05C1/00 ,  C05G3/00 ,  C05C1/02 ,  C05D9/02 ,  B01J2/30 ,  C05B17/00

    Abstract: The invention relates to a method for providing an inorganic coating to ammonium nitrate (AN) based particles, in particular to ammonium nitrate-based particles for use as a fertilizer, as well as to an inorganic coating for ammonium nitrate-based particles per se. The method comprises the steps of: a) applying a liquid concentrated mineral acid with a water content of less than 50 weight %, to the particles, in order to at least solubilize ammonium nitrate at the outer surface of the particles such that an acidified particle grasping layer is obtained, and b) applying a solid mineral alkaline in powder form to the particles of step a) in order to react with the grasping layer of the particles to coat the acidified particle surface; wherein the stoichiometric ratio of solid mineral alkaline in powder form to concentrated mineral acid is equal to or more than 5:1.

    Method for limiting the use of an ammonium nitrate fertilizer as a precursor for an explosive and composition therefor
    19.
    发明授权
    Method for limiting the use of an ammonium nitrate fertilizer as a precursor for an explosive and composition therefor 有权
    限制使用硝酸铵肥料作为爆炸物及其组合物的前体的方法

    公开(公告)号：US09328031B2

    公开(公告)日：2016-05-03

    申请号：US14422812

    申请日：2013-08-28

    Applicant: YARA INTERNATIONAL ASA

    Inventor： Francois Ledoux ,  Bart De Moor

    IPC: C05B1/02 ,  C05C1/00 ,  C05G3/00

    CPC classification number: C05C1/00 ,  C05B1/02 ,  C05G3/00 ,  C05C9/00 ,  C05D5/00 ,  C05C5/04 ,  C05B1/00 ,  C05B7/00

    Abstract: The present invention relates to a fertilizer composition comprising ammonium nitrate, of which the potential misuse as a precursor for an explosive is limited on the one hand, without hampering its legitimate use by farmers for food production on the other hand, to a method for the preparation of said fertilizer composition, and to the use thereof. The fertilizer composition comprising ammonium nitrate comprises a non-hygroscopic agent which is able to form a non-hygroscopic fertilizer composition with ammonium nitrate under normal conditions of storage and use, and to form an hygroscopic composition with ammonium nitrate after said fertilizer composition is contacted with water, and optionally a foaming agent. According to one embodiment, the non-hygroscopic agent is selected from the group of non-hygroscopic urea double salts, in particular urea calcium nitrate (UCaN).

    Abstract translation: 本发明涉及一种包含硝酸铵的肥料组合物，其一方面限制了作为爆炸物前体的潜在误用，另一方面限制了农民合法使用食品生产的方法。 所述肥料组合物的制备及其用途。 包含硝酸铵的肥料组合物包含非吸湿剂，其能够在正常储存和使用条件下与硝酸铵形成非吸湿性肥料组合物，并且在所述肥料组合物接触之后形成具有硝酸铵的吸湿组合物 水和任选的发泡剂。 根据一个实施方案，非吸湿剂选自非吸湿性尿素复合盐，特别是尿素硝酸钙（UCaN）。

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