中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

119 records (took 0.032 seconds)

    PLANTA DE PRODUCCION DE UREA
    41.
    发明专利
    PLANTA DE PRODUCCION DE UREA 未知

    公开(公告)号：PE23472014A1

    公开(公告)日：2015-01-30

    申请号：PE0019342014

    申请日：2013-05-02

    Applicant: STAMICARBON

    Inventor： MENNEN JOHANNES HENRICUS ,  MEESEN JOZEF HUBERT

    IPC: C07C273/04

    CPC classification number: C07C273/04 ,  B01D5/006 ,  B01D5/009 ,  B01D47/00 ,  B01J10/00 ,  B23P15/26 ,  Y10T29/49352

    Abstract: SE REFIERE A UNA PLANTA PARA LA PRODUCCION DE UREA QUE COMPRENDE SECCIONES CONVENCIONALES TALES COMO A) UNA SECCION DE SINTESIS Y RECUPERACION; B) UNA SECCION DE EVAPORACION; C) UNA SECCION DE TERMINADO DE LA UREA; D) UNA SECCION DE DEPURACION DE POLVO; E) UNA SECCION DE CONDENSACION; Y F) UN BUCLE DE EVAPORACION Y CONDENSACION ADICIONAL ES INTRODUCIDO DESDE Y HACIA LA SECCION DE DEPURACION DE POLVO. EL USO DE DICHO BUCLE INCREMENTA LA CAPACIDAD DE LA PLANTA DE UREA RESULTANDO EN UN CONSUMO MAS FAVORABLE DE LA ENERGIA DE LA PLANTA

    Method for concentrating an aqueous ammonium carbamate stream
    44.
    发明专利
    Method for concentrating an aqueous ammonium carbamate stream 未知

    公开(公告)号：AU2006244735B2

    公开(公告)日：2012-02-16

    申请号：AU2006244735

    申请日：2006-05-15

    Applicant: STAMICARBON

    Inventor： TJIOE TJAY TJIEN ,  MENNEN JOHANNES HENRICUS

    IPC: C07C273/12

    Abstract: The invention relates to a method for concentrating an aqueous ammonium carbamate stream, which has been formed in a process for the preparation of urea, has a pressure between 0.20 MPa and 0.9 MPa, a temperature between 35 °C and 95 °C, and contains at least 25 wt.% H2O, comprising: a pressure increase step, in which the aqueous ammonium carbamate stream is increased in pressure to a pressure between 1.0 MPa and 7 MPa; a condensation step, in which the aqueous ammonium carbamate stream is contacted with a gas stream, which has been formed in a process for the preparation of melamine and which consists essentially of NH, CO and optionally HO and has a lower HO content than the aqueous ammonium carbamate stream, the gas stream being absorbed in the aqueous ammonium carbamate stream in such a way that a concentrated ammonium carbamate stream is formed that contains between 15 and 35 wt.% HO; a discharge step, in which the concentrated ammonium carbamate stream is separated and discharged.

    PROCESS FOR THE PREPARATION OF MELAMINE
    46.
    发明专利
    PROCESS FOR THE PREPARATION OF MELAMINE 未知

    公开(公告)号：MY143964A

    公开(公告)日：2011-07-29

    申请号：MYPI20060446

    申请日：2006-02-03

    Applicant: STAMICARBON

    Inventor： MENNEN JOHANNES HENRICUS

    IPC: C07D251/60

    Abstract: THE INVENTION IS DIRECTED TO A PROCESS FOR THE PREPARATION OF MELAMINE CONNECTED THROUGH A CARBAMATE CONCENTRATION UNIT, COMPRISING A DESORPTION COLUMN IN WHICH A GAS STREAM, COMPRISING AMMONLA, CARBON DIOXIDE AND WATER IS GENERATED, WITH A PROCESS FOR THE PREPARATION OF UREA, COMPRISING A HEAT EXCHANGER WHEREIN A UREA CONTAINING STREAM IS PRESENT, WHEREIN THE GAS STREAM, COMPRISING AMMONIA, CARBON DIOXIDE AND WATER, IS SEND TO THE HEAT EXCHANGER, WHEREIN HEAT IS EXCHANGED WITH THE UREA CONTAINING STREAM AND THE GAS STREAM, COMPRISING AMMONIA, CARBON DIOXIDE AND WATER IS COOLED AND AT LEAST PARTIALLY CONDENSED TO OBTAIN AN AMMONIUM CARBAMATE SOLUTION THAT IS SEND TO THE PROCESS FOR THE PREPARATION OF UREA.

    UREA FINISHING METHOD
    49.
    发明专利
    UREA FINISHING METHOD 未知

    公开(公告)号：MY177074A

    公开(公告)日：2020-09-04

    申请号：MYPI2013702489

    申请日：2012-10-12

    Applicant: STAMICARBON

    Inventor： MENNEN JOHANNES HENRICUS

    Abstract: Disclosed is a method for urea finishing. A urea solution is subjected to crystallization and, other than in conventional processes, the urea crystals are shaped by exerting mechanical force onto them. Thus, the conventional prilling or granulation finishing steps can be avoided, and so are the corresponding emissions of ammonia and/or dust. The crystallization comprises a flash crystallization. The invention also pertains to the urea particles obtainable by the process, to a urea plant, and to a method of modifying an existing urea plant.

    СПОСОБ ПРОИЗВОДСТВА КАРБАМИДНОГО ПРОДУКТА
    50.
    发明专利
    СПОСОБ ПРОИЗВОДСТВА КАРБАМИДНОГО ПРОДУКТА 未知

    公开(公告)号：EA035246B1

    公开(公告)日：2020-05-20

    申请号：EA201790233

    申请日：2015-07-16

    Applicant: STAMICARBON

    Inventor： MENNEN JOHANNES HENRICUS

    IPC: B01D9/00 ,  C07C273/16 ,  C07C275/02

    Abstract: Предложенспособполучениякарбамидногопродукта, пригодногодляразбавленияводойс образованиемводногораствора, содержащегокарбамид, дляиспользованияв устройстведлявосстановленияоксидовазота NOx ввыхлопныхгазахдвигателейвнутреннегосгорания, такжеизвестногокакжидкостьдляочисткидизельныхвыхлопныхгазов (DEF) илидляиспользованияв системахденитрификации (DeNOx) пара, выпускаемогоизпромышленныхпечей. Способвключаетполучениеводногорастворакарбамидаизсекцииизвлеченияилипосленеев процессепроизводствакарбамида. Этотраствор, имеющийнизкоесодержаниепримесей, подвергаюткристаллизациимгновеннымиспарениемпринизкомдавлениидляполученияпродукта, содержащеготвердыйкристаллизованныйкарбамид, которыйпредставляетсобойлегкосыпучийпорошок, содержащийменее 0,2 мас.% воды. Этотпродуктупаковываютв условиях, позволяющихподдерживатьсодержаниеводыв упакованномпродуктенауровнениже 0,2 мас/%. Настоящееизобретениетакжеможетбытьиспользованов способеповышенияпроизводительностисуществующейустановкипопроизводствукарбамида.

Patent Agency Ranking