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    ZERO EMISSION UREA PROCESS AND PLANT
    35.
    发明专利
    ZERO EMISSION UREA PROCESS AND PLANT 未知

    公开(公告)号：CA2830648C

    公开(公告)日：2018-06-26

    申请号：CA2830648

    申请日：2012-03-30

    Applicant: STAMICARBON

    Inventor： MENNEN JOHANNES HENRICUS ,  CUCCHIELLA BARBARA

    IPC: C07C273/04 ,  B01J19/24

    Abstract: Disclosed is a method for the production of urea allowing a substantial reduction, even down to zero, of the continuous emission of ammonia conventionally resulting from such a process. According to a preferred embodiment of the invention, the urea-forming reaction from carbon dioxide and ammonia is conducted in a synthesis section that does not require passivation by oxygen. As a result of the absence of oxygen, a hydrogen-rich gas stream results from the synthesis section, that can be used as a fuel in an incinerator. In the incinerator, ammonia-comprising gas streams from the urea production process are combusted.

    processo de acabamento de ureia
    37.
    发明专利
    processo de acabamento de ureia 未知

    公开(公告)号：BR112013032910A2

    公开(公告)日：2017-01-24

    申请号：BR112013032910

    申请日：2012-10-12

    Applicant: STAMICARBON

    Inventor： MENNEN JOHANNES HENRICUS

    IPC: C07C273/02 ,  B01J2/22 ,  C07C273/16

    Abstract: resumo patente de invenção: "processo de acabamento de ureia". é descrito um processo para o acabamento de ureia. a solução de ureia é sujeita a uma cristalização e, sem ser em processos convencionais, os cristais de ureia são moldados exercendo a força mecânica sobre os mesmos. assim, podem ser evitadas as etapas convencionais de acabamento de formação de pepitas ou de granulação e assim as emissões correspondentes de amônia e/ou de pó fino. a cristalização compreende uma cristalização por vaporização instantânea ("flash"). a invenção também se refere às partículas de ureia que podem ser obtidas pelo processo, a uma planta de ureia e a um processo para modificar uma planta de ureia existente. 20076965v1

    UREA PRODUCTION PROCESS CHARACTERIZED BY SHORT UREA MELT TRANSPORTATION TIME BETWEEN LAST CONCENTRATOR AND PRILLING TOWER
    40.
    发明专利
    UREA PRODUCTION PROCESS CHARACTERIZED BY SHORT UREA MELT TRANSPORTATION TIME BETWEEN LAST CONCENTRATOR AND PRILLING TOWER 未知

    公开(公告)号：GEP20156401B

    公开(公告)日：2015-11-10

    申请号：GEAP2012013419

    申请日：2012-08-17

    Applicant: STAMICARBON

    Inventor： MENNEN JOHANNES HENRICUS

    IPC: C07C273/04

    Abstract: The invention relates to a method for urea production and to a urea production plant wherein ammonia emission in the final step of forming urea prills is reduced. In the method, the concentration of a urea solution is performed in at least three consecutive concentration steps and the residence time of urea melt leaving a last concentrator to the prilling tower is minimised. This can be achieved by placing the last concentrator in adjacency with a urea melt inlet of the prilling tower, such as above the prilling tower. In this way, the ammonia emission in the prilling tower can be reduced by as much as 50% compared to the conventional urea production plants. The invention further relates to a method for reducing ammonia emission in the prilling tower of an existing urea production plant.

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