利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

24 条记录 (耗时 0.014 秒)

    CORROSION MONITORING METHOD
    2.
    发明公开
    CORROSION MONITORING METHOD 审中-公开

    公开(公告)号：US20240344968A1

    公开(公告)日：2024-10-17

    申请号：US18701041

    申请日：2022-10-11

    申请人： Casale SA

    发明人： Leonardo Marrone ,  Marco Ormellese ,  Silvia Beretta

    IPC分类号： G01N17/02 ,  G01N17/04

    CPC分类号： G01N17/02 ,  G01N17/04

    摘要： Method for determining the corrosion rate of a piece of equipment of a urea synthesis plant, the method comprises the provision of electrodes including a working electrode immersed in an aqueous solution containing ammonium carbamate, the method further comprises the determination of polarization data of the working electrode and the determination of the corrosion rate of said piece of equipment based on said polarization data.

    PROCESS FOR PRODUCING BIURET FROM UREA
    4.
    发明公开
    PROCESS FOR PRODUCING BIURET FROM UREA 审中-公开

    公开(公告)号：US20230322660A1

    公开(公告)日：2023-10-12

    申请号：US18037704

    申请日：2021-08-31

    申请人： Casale SA

    发明人： Leonardo Marrone ,  Alberto Benedetti ,  Pierdomenico Biasi ,  Cristina Pizzolitto

    IPC分类号： C07C275/62

    CPC分类号： C07C275/62

    摘要： A process for the production of biuret from urea wherein: a urea aqueous solution (24) withdrawn from the recovery section of a urea plant is processed to remove water and obtain a concentrated urea melt (25); said urea melt is processed under biuret-forming conditions to decompose urea into biuret and ammonia and obtain a high-biuret urea melt (26); said high-biuret urea melt (26) is diluted with water or with an aqueous stream obtaining a solution (28); the solution (28) is subject to crystallization and precipitation of a solid phase containing biuret which is separated from the aqueous phase.

    Method for controlling a vibrating prilling bucket in a urea prilling process
    6.
    发明授权
    Method for controlling a vibrating prilling bucket in a urea prilling process 有权

    公开(公告)号：US11511248B2

    公开(公告)日：2022-11-29

    申请号：US17763400

    申请日：2020-09-01

    申请人： Casale SA

    发明人： Leonardo Marrone

    IPC分类号： B01J2/18 ,  B01J2/02

    摘要： A method for controlling a prilling bucket in the prilling of a a urea melt (UM) including: feeding the urea melt to a prilling bucket (1) which vibrates under the action of a magnetostrictive device (2), wherein the vibration of the bucket is controlled, as a function of the amount of urea melt to be prilled, by the following steps: acquisition of a time-varying input signal (3) which represents the flow rate of urea melt fed to the prilling bucket; generation of a first signal (5) and of a second signal (6), independently from each other, as a function of said input signal (3); generation of a third signal (10) having a frequency which is modulated by said first signal and an magnitude which is modulated by said second signal, and use of said third signal to drive said magnetostrictive device (2).

    PROCESS FOR PRODUCING FEED-GRADE UREA
    8.
    发明公开
    PROCESS FOR PRODUCING FEED-GRADE UREA 审中-公开

    公开(公告)号：US20230303485A1

    公开(公告)日：2023-09-28

    申请号：US18035030

    申请日：2021-09-10

    申请人： Casale SA

    发明人： Leonardo Marrone

    IPC分类号： C07C273/16 ,  C05C9/00

    CPC分类号： C07C273/16 ,  C05C9/005

    摘要： A process for the production of feed grade urea starting from a liquid urea melt, the process comprising processing the urea melt (6) to promote the formation of biuret until a concentration of at least 3% biuret, and subjecting the so obtained biuret-containing urea melt (8) to a shaping process to obtain a granular urea product.

    PROCESS AND PLANT FOR THE SYNTHESIS OF UREA
    9.
    发明申请
    PROCESS AND PLANT FOR THE SYNTHESIS OF UREA 有权

    公开(公告)号：US20230118984A1

    公开(公告)日：2023-04-20

    申请号：US17802101

    申请日：2021-02-09

    申请人： Casale SA

    发明人： Leonardo Marrone ,  Paolo Bertini ,  Matteo Fumagalli

    IPC分类号： C07C273/04 ,  B01J19/24

    摘要： 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.