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    PROCESS AND PLANT FOR THE SYNTHESIS OF UREA AND MELAMINE
    6.
    发明公开
    PROCESS AND PLANT FOR THE SYNTHESIS OF UREA AND MELAMINE 审中-公开
    VERFAHREN UND ANLAGE ZUR SYNTHESE VON HARNSTOFF UND MELAMIN

    公开(公告)号：EP3137448A1

    公开(公告)日：2017-03-08

    申请号：EP15719993.6

    申请日：2015-04-16

    Applicant: Casale SA

    Inventor： BERTINI, Paolo ,  DI CARLO, Gabriele

    IPC: C07C273/12 ,  C07D251/60

    CPC classification number: C07D251/60 ,  B01J3/04 ,  B01J4/02 ,  B01J10/00 ,  B01J19/24 ,  C07C273/12 ,  Y02P20/125

    Abstract: An integrated process for the synthesis of urea and melamine, wherein: urea is synthesized with a stripping process in a high-pressure synthesis loop comprising a reactor, a stripper and a carbamate condenser, and the urea solution leaving said stripper is sent to a recovery section to produce a concentrated urea product and a recovered carbamate solution; at least part of said urea product is converted to melamine, and the off-gas from the synthesis of melamine are recycled to the urea synthesis by mixing with the gas phase from the stripper and with said recovered carbamate solution, thus forming a mixed flow which is then condensed in said carbamate condenser, and the condensate is eventually directed to the reactor.

    Abstract translation: 用于合成尿素和三聚氰胺的综合方法，其中：在包含反应器，汽提塔和氨基甲酸酯冷凝器的高压合成回路中用汽提方法合成尿素，并将离开所述汽提塔的尿素溶液送至回收 以产生浓缩的尿素产物和回收的氨基甲酸酯溶液; 所述尿素产物的至少一部分转化为三聚氰胺，通过与来自汽提塔的气相和所述回收的氨基甲酸酯溶液混合，将来自三聚氰胺的合成的废气再循环到尿素合成中，从而形成混合流 然后在所述氨基甲酸酯冷凝器中冷凝，并且冷凝物最终被引导到反应器。

    A PROCESS FOR THE SYNTHESIS OF UREA
    8.
    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.

    PROCESS AND PLANT FOR THE SYNTHESIS OF UREA AND MELAMINE
    9.
    发明授权
    PROCESS AND PLANT FOR THE SYNTHESIS OF UREA AND MELAMINE 有权

    公开(公告)号：EP3137448B1

    公开(公告)日：2018-10-17

    申请号：EP15719993.6

    申请日：2015-04-16

    Applicant: Casale SA

    Inventor： BERTINI, Paolo ,  DI CARLO, Gabriele

    IPC: C07C273/12 ,  C07D251/60

    CPC classification number: C07D251/60 ,  B01J3/04 ,  B01J4/02 ,  B01J10/00 ,  B01J19/24 ,  C07C273/12 ,  Y02P20/125

    Abstract: An integrated process for the synthesis of urea and melamine, wherein: urea is synthesized with a stripping process in a high-pressure synthesis loop comprising a reactor, a stripper and a carbamate condenser, and the urea solution leaving said stripper is sent to a recovery section to produce a concentrated urea product and a recovered carbamate solution; at least part of said urea product is converted to melamine, and the off-gas from the synthesis of melamine are recycled to the urea synthesis by mixing with the gas phase from the stripper and with said recovered carbamate solution, thus forming a mixed flow which is then condensed in said carbamate condenser, and the condensate is eventually directed to the reactor.

    A METHOD FOR MEASURING A LIQUID LEVEL IN A PRESSURE VESSEL
    10.
    发明公开
    A METHOD FOR MEASURING A LIQUID LEVEL IN A PRESSURE VESSEL 审中-公开

    公开(公告)号：EP3786593A1

    公开(公告)日：2021-03-03

    申请号：EP19194629.2

    申请日：2019-08-30

    Applicant: CASALE SA

    Inventor： BERTINI, Paolo ,  SCOTTO, Andrea ,  DI CARLO, Gabriele

    IPC: G01F23/24

    Abstract: A method for measuring a liquid level (L) in a pressure vessel (2) the method comprising: providing a thermometric well (10) inside the pressure vessel, heating an inner surface of the thermometric well which is not in contact with the fluid, detecting the temperature of at least one detection point of said inner surface; estimating a position of the liquid level based on the difference between a reference temperature and the temperature so detected.

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