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32 records (took 0.043 seconds)

    11.
    发明专利
    未知

    公开(公告)号：NO773762A

    公开(公告)日：1978-05-05

    申请号：NO773762

    申请日：1977-11-02

    Applicant: STAMICARBON

    Inventor： BIERMANS ANDREAS JOHANNES

    IPC: C01C1/02 ,  B01D3/14 ,  B01D19/00 ,  B01D53/26 ,  C01B32/50 ,  C01C1/12 ,  C01C

    CPC classification number: B01D53/26 ,  B01D3/143 ,  B01D19/0005 ,  B01D19/0068 ,  C01B32/50 ,  C01C1/12 ,  Y02C10/06 ,  Y02P20/152 ,  Y02P70/34

    Abstract: An improved process for the separate recovery of substantially pure ammonia and substantially pure carbon dioxide from mixtures containing ammonia and carbon dioxide, and possibly water, such as are obtained as by-products in the manufacture of melamine from urea or the synthesis of urea from ammonia and carbon dioxide. The by-product mixture is introduced into a process loop having an ammonia separation zone, a carbon dioxide separation zone and a desorption zone, the zone to which the mixture is initially fed being dependent upon its composition. An ammonia off-gas, substantially free of carbon dioxide and water, is obtained from the ammonia separation zone, and the residual liquid phase is introduced into the carbon dioxide separation zone. Diluting water is also added to the carbon dioxide separation zone in an amount of from about 0.2 to 6 times, by weight, the combined total weight of the residual liquid phase from the ammonia separation zone and the by-product mixture, if any, fed into the carbon dioxide separation zone. A carbon dioxide off-gas, substantially free of ammonia and water, is obtained from the carbon dioxide separation zone and the residual liquid phase therefrom is introduced into the desorption zone wherein substantially all of the ammonia and carbon dioxide are desorbed and separated from the liquid phase and introduced into the ammonia separation zone.

    Process for the preparation of urea
    13.
    发明专利
    Process for the preparation of urea 未知

    公开(公告)号：AU2002221194B2

    公开(公告)日：2006-07-20

    申请号：AU2002221194

    申请日：2001-11-01

    Applicant: STAMICARBON

    Inventor： JONCKERS KEES ,  BIERMANS ANDREAS JOHANNES

    IPC: C07C273/04

    Abstract: Process for the preparation of urea from ammonia and carbon dioxide in which all or part of the liquid ammonia needed for the process is supplied to the high-pressure scrubber in such a way that it is in direct contact with the other streams supplied to this scrubber. In particular in such a way that there is direct contact between the liquid ammonia and the off-gases transferred to the high-pressure scrubber from the urea synthesis reactor. More in particular in such a way that there is direct contact between the liquid ammonia and the off-gases transferred to the high-pressure scrubber from the urea reactor and with the carbamate stream, which is transferred from the low-pressure urea recovery section.

    18.
    发明专利
    未知

    公开(公告)号：FI773282A

    公开(公告)日：1978-05-04

    申请号：FI773282

    申请日：1977-11-02

    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 ,  B01D

    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)

    20.
    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)

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