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    A METHOD AND SYSTEM FOR CONTROLLING A VIBRATING PRILLING BUCKET IN A UREA PRILLING PROCESS
    4.
    发明公开
    A METHOD AND SYSTEM FOR CONTROLLING A VIBRATING PRILLING BUCKET IN A UREA PRILLING PROCESS 审中-公开

    公开(公告)号：EP3797861A1

    公开(公告)日：2021-03-31

    申请号：EP19199166.0

    申请日：2019-09-24

    Applicant: CASALE SA

    Inventor： MARRONE, Leonardo

    IPC: B01J2/02 ,  B01J2/18

    Abstract: 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).

    A REACTOR FOR THE SYNTHESIS OF UREA
    5.
    发明公开
    A REACTOR FOR THE SYNTHESIS OF UREA 审中-公开

    公开(公告)号：EP3760306A1

    公开(公告)日：2021-01-06

    申请号：EP19183879.6

    申请日：2019-07-02

    Applicant: CASALE SA

    Inventor： DENTE, Mario ,  MARRONE, Leonardo ,  MAFFIETTI, Federico

    IPC: B01J19/00 ,  B01D3/20 ,  B01D3/22 ,  B01J19/24 ,  B01J19/32 ,  C07C273/04

    Abstract: A reactor for the synthesis of urea comprising a vertical shell and perforated baffles or trays (3) arranged to define compartments of the reactor, wherein each baffle comprises an array of individual perforated tiles (10) wherein each tile (101) comprises side walls (101A - 101D) and a top face (101F), the side walls having first perforations for the liquid and said top face having second perforations for the gas, wherein said second perforations are smaller than said first perforations, and the tiles are distributed over the baffle with a two-dimensional pattern where adjacent tiles are separated by gaps (17).

    REVAMPING OF AMMONIA-UREA PLANTS
    7.
    发明公开
    REVAMPING OF AMMONIA-UREA PLANTS 审中-公开

    公开(公告)号：EP3896031A1

    公开(公告)日：2021-10-20

    申请号：EP20170057.2

    申请日：2020-04-17

    Applicant: CASALE SA

    Inventor： IOCCHI, Filippo ,  MARRONE, Leonardo

    IPC: C01B3/02 ,  C01C1/04 ,  C07C273/04

    Abstract: A method for revamping an ammonia-urea plant wherein: the ammonia section is modernized to produce an extra amount of low pressure steam; condensation stage of the high-pressure urea synthesis loop is modified to use part of the condensation heat of the urea stripper vapours to produce medium-pressure steam, said medium-pressure steam is fed to one or more steam users of the urea section, particularly for carbamate decomposition, the input of low-pressure steam to the urea section is balanced by importing the extra low-pressure steam produced in the ammonia section.

    A PROCESS FOR THE SYNTHESIS OF UREA
    9.
    发明公开
    A PROCESS FOR THE SYNTHESIS OF UREA 审中-公开

    公开(公告)号：EP3766865A1

    公开(公告)日：2021-01-20

    申请号：EP19186881.9

    申请日：2019-07-18

    Applicant: CASALE SA

    Inventor： MARRONE, Leonardo ,  BERTINI, Paolo

    IPC: C07C273/04

    Abstract: A process for synthesis of urea from ammonia and carbon dioxide comprising the synthesis of urea in parallel in a first urea reactor (1) at a first urea synthesis pressure and in a second urea reactor (2) at a second and lower urea synthesis pressure; a stripping step of the reaction effluent of the first reactor, which is performed in a stripper (4) operating at a stripping pressure lower than the first urea synthesis pressure; the reaction effluent (21) of the second reactor (2) and the stripper liquid effluent (11) are sent to a recovery section (13) where a carbamate-containing recycle solution (17) is produced, and said recycle solution (17) is sent partly to said first reactor and partly to said second reactor.

    A PROCESS FOR THE SYNTHESIS OF UREA
    10.
    发明公开
    A PROCESS FOR THE SYNTHESIS OF UREA 审中-公开

    公开(公告)号：EP3656759A1

    公开(公告)日：2020-05-27

    申请号：EP18207697.6

    申请日：2018-11-22

    Applicant: CASALE SA

    Inventor： MARRONE, Leonardo

    IPC: C07C273/04 ,  B01J19/24

    Abstract: A process for synthesis of urea from CO 2 and NH 3 wherein a steam flow (13) produced in the condenser (3) of a high-pressure synthesis loop is compressed to raise its pressure and temperature before using the steam as a heat source for a downstream step of the process.

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