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    45.
    发明专利
    未知

    公开(公告)号：MX7509E

    公开(公告)日：1989-05-16

    申请号：MX1026977

    申请日：1977-11-03

    Applicant: STAMICARBON ,  UNIE VAN KUNSTMESTFAB BV

    Inventor： BIERMANS ANDREAS JOHANNES ,  JONCKERS KEES

    IPC: B01D20060101 ,  B01D3/00 ,  B01D3/14 ,  B01D3/34 ,  B01D53/00 ,  B01D53/04 ,  B01D53/14 ,  B01D57/00 ,  C01B20060101 ,  C01B3/20 ,  C01B32/50 ,  C01C20060101 ,  C01C1/02 ,  C01C1/10 ,  C01C1/12 ,  C07C1/12 ,  C07C273/04

    Abstract: Procedure for separately recovering substantially pure NH3 and substantially pure CO2 from a composition comprising NH3 and CO2, which method comprises treating said composition sequentially through three separation zones of which the NH3 separation zone is operated so that a gaseous phase of substantially pure NH3 and a liquid phase boiling at a constant temperature and containing NH3, CO2 and water are obtained, the liquid phase of which is passed to the CO2 separation zone, an area that is made to work so that Obtain a gas phase of substantially pure CO2 and a residual liquid phase that boils at a constant temperature and that contains NH3, CO2 and water, the residual liquid phase of which is passed to a desorption zone where substantially all of the NH3, CO2 and part from the water they are removed in the form of a gas phase and are fed at least partially to the NH3 separation zone. (Machine-translation by Google Translate, not legally binding)

    46.
    发明专利
    未知

    公开(公告)号：DD262806A5

    公开(公告)日：1988-12-14

    申请号：DD30857987

    申请日：1987-11-02

    Applicant: STAMICARBON

    Inventor： JONCKERS KEES ,  BURKS HENK CH

    IPC: B01D1/22 ,  B01D1/06 ,  C07C67/00 ,  C07C239/00 ,  C07C273/04 ,  C07C273/16 ,  F28F13/04

    Abstract: Process for concentrating a urea solution passing as a film along the inside of the tubes (2) of a vertical tube bundle the heat required being substantially generated by condensation of a gas mixture in a area provided around the bundle of tubes, the gas mixture being supplied to the area near one end of the tube bundle (2) and the urea solution to the other end of the tube bundle (2), and being passed substantially upwards through the heating area and it is ensured that the gas mixtureor condensate cannot flow back. Installation for carrying out the process wherein the heating area is divided into compartment by means of horizontal baffles (3) allowing an upwardly directed flow of the gas mixture and the condensate.

    PROCESS FOR THE PREPARATION OF UREA
    47.
    发明专利
    PROCESS FOR THE PREPARATION OF UREA 未知

    公开(公告)号：DE3565680D1

    公开(公告)日：1988-11-24

    申请号：DE3565680

    申请日：1985-03-15

    Applicant: STAMICARBON

    Inventor： JONCKERS KEES

    IPC: C07C67/00 ,  C07C239/00 ,  C07C273/04 ,  C07C126/02

    Abstract: A process for the preparation of urea in which a carbamate- and free ammonia-containing urea synthesis solution is formed from carbon dioxide and excess ammonia in a synthesis zone at a pressure of 125-350 bar, at least a portion of the carbamate present in the urea synthesis solution is decomposed in a stripping zone at the pressure of the synthesis zone or at lower pressure by heat supply and countercurrent contact with a stripping gas, the carbamate decomposition products, together with a portion of the excess ammonia and the stripping gas, are removed from the stripping zone as a gas mixture, at least a portion of the gas mixture obtained is condensed in a condensation zone and the stripped urea synthesis solution is processed into a urea solution or solid urea. The process is characterized in that in the condensation zone also at least 30% of the equilibrium amount of urea achievable under the reaction conditions is allowed to form and the carbamate- and urea-containing mixture is supplied to the synthesis zone. By preference, urea formation is continued until 50-80 %, of the way to the equilibrium has been covered.

    THE METHOD OF UREA CONCENTRATION AND THE DEVICE FOR ITS APPLICATION
    48.
    发明专利
    THE METHOD OF UREA CONCENTRATION AND THE DEVICE FOR ITS APPLICATION 未知

    公开(公告)号：PL268572A1

    公开(公告)日：1988-09-01

    申请号：PL26857287

    申请日：1987-11-03

    Applicant: STAMICARBON

    Inventor： JONCKERS KEES ,  BURKS HENK CH

    IPC: B01D1/06 ,  B01D1/22 ,  C07C67/00 ,  C07C239/00 ,  C07C273/04 ,  C07C273/16 ,  F28F13/04 ,  C07C

    Abstract: Process for concentrating a urea solution passing as a film along the inside of the tubes (2) of a vertical tube bundle the heat required being substantially generated by condensation of a gas mixture in a area provided around the bundle of tubes, the gas mixture being supplied to the area near one end of the tube bundle (2) and the urea solution to the other end of the tube bundle (2), and being passed substantially upwards through the heating area and it is ensured that the gas mixtureor condensate cannot flow back. Installation for carrying out the process wherein the heating area is divided into compartment by means of horizontal baffles (3) allowing an upwardly directed flow of the gas mixture and the condensate.

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

    公开(公告)号：PL268571A1

    公开(公告)日：1988-09-01

    申请号：PL26857187

    申请日：1987-11-03

    Applicant: STAMICARBON

    Inventor： JONCKERS KEES ,  BURKS HENK CH

    IPC: C07C67/00 ,  C07C239/00 ,  C07C273/04 ,  C07C

    Abstract: Process for preparing urea in which, - at a pressure of 125-350 bar and the corresponding temperature, a urea synthesis solution containing carbamate is formed from carbon dioxide and an excess of ammonia, - in a first decomposition step part of the carbamate is decomposed, with supply of heat and in countercurrent contact with a stripping gas, and the resulting gas phase is in part condensed in a first con-densation zone, - in at least two further decomposition steps a further part of the carbamate still present is decomposed and the gas mixture formed is separated off, in the first of the further decomposition steps a pressure of 4-40 bar being maintained, - the remaining urea-containing solution is processed by evaporation to form a concentrated urea solution, the heat required for evaporation being obtained at least in part by condensation of the gas mixture obtained in the first of the further decomposition steps. The gas mixture used in the first evaporation step is formed by the gas phase resulting from the heat exchange between the part of the stripped urea synthesis solution expanded to a pressure of 4-40 bar and the condensing gas mixture in the first condensation zone.

    APPARATUS FOR CONCENTRATING UREA SOLUTION
    50.
    发明专利
    APPARATUS FOR CONCENTRATING UREA SOLUTION 未知

    公开(公告)号：HUT44949A

    公开(公告)日：1988-05-30

    申请号：HU491787

    申请日：1987-11-02

    Applicant: STAMICARBON

    Inventor： JONCKERS KEES ,  BURKS HENK C

    IPC: B01D1/22 ,  B01D1/06 ,  C07C67/00 ,  C07C239/00 ,  C07C273/04 ,  C07C273/16 ,  F28F13/04 ,  B01D1/24

    Abstract: Process for concentrating a urea solution passing as a film along the inside of the tubes (2) of a vertical tube bundle the heat required being substantially generated by condensation of a gas mixture in a area provided around the bundle of tubes, the gas mixture being supplied to the area near one end of the tube bundle (2) and the urea solution to the other end of the tube bundle (2), and being passed substantially upwards through the heating area and it is ensured that the gas mixtureor condensate cannot flow back. Installation for carrying out the process wherein the heating area is divided into compartment by means of horizontal baffles (3) allowing an upwardly directed flow of the gas mixture and the condensate.

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