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    VERFAHREN ZUR ABTRENNUNG VON TRIOXAN AUS EINEM TRIOXAN/FORMALDEHYD/WASSER-GEMISCH
    44.
    发明授权
    VERFAHREN ZUR ABTRENNUNG VON TRIOXAN AUS EINEM TRIOXAN/FORMALDEHYD/WASSER-GEMISCH 有权
    方法分离三恶烷的三恶烷/甲醛/水混合物

    公开(公告)号：EP1699537B1

    公开(公告)日：2010-09-22

    申请号：EP04804129.7

    申请日：2004-12-21

    Applicant: BASF SE

    Inventor： LANG, Neven ,  STROEFER, Eckhard ,  STAMMER, Achim ,  FRIESE, Thorsten ,  SIEGERT, Markus ,  OTT, Michael ,  HASSE, Hans ,  GRÜTZNER, Thomas ,  BLAGOV, Sergej

    IPC: B01D3/36 ,  C07D323/06 ,  B01D3/14

    CPC classification number: C07D323/06 ,  B01D3/146 ,  B01D3/36 ,  Y02P20/127

    Abstract: The invention relates to a method for separating trioxane from a mixture containing formaldehyde, trioxane and water. According to said method: the mixture (1) is distilled in a first distillation stage (7) at a pressure of between 0.1 and 2 bar to obtain a stream (8) containing formaldehyde and a stream (9) containing predominantly trioxane, in addition to water and formaldehyde; the stream (9) is mixed with a recycling stream (19) containing predominantly trioxane, in addition to water and formaldehyde to form a stream (10) containing predominantly trioxane, in addition to water and formaldehyde; the stream (10) is then distilled in a second distillation stage (14) at a pressure of between 0.2 and 10 bar, optionally after the separation of low-boilers from the stream (9) or (10) in an additional distillation stage (11). The pressure in the second distillation stage (14) is at least 0.1 bar higher than the pressure in the first distillation stage (7). Said distillation produces a stream (15) consisting of trioxane and a stream (16) containing predominantly trioxane, in addition to water and formaldehyde. The stream (16) is then distilled in a third distillation stage (17) at a pressure of between 0.1 and 4 bar, to obtain a stream (18) containing predominantly water, in addition to formaldehyde and the recycling stream (19) containing predominantly trioxane, in addition to water and formaldehyde. The resultant stream (18) is optionally distilled in a fourth distillation stage (20), to obtain a stream (21) containing predominantly water and a stream (22) containing predominantly formaldehyde.

    VERFAHREN ZUR ABTRENNUNG VON TRIOXAN AUS EINEM TRIOXAN/FORMALDEHYD/WASSER-GEMISCH MITTELS DRUCKWECHSEL-REKTIFIKATION
    46.
    发明授权
    VERFAHREN ZUR ABTRENNUNG VON TRIOXAN AUS EINEM TRIOXAN/FORMALDEHYD/WASSER-GEMISCH MITTELS DRUCKWECHSEL-REKTIFIKATION 有权
    方法分离三恶烷的三恶烷/甲醛/水混合物在压力变化精馏的方式

    公开(公告)号：EP1699776B1

    公开(公告)日：2008-11-12

    申请号：EP04804133.9

    申请日：2004-12-21

    Applicant: BASF SE

    Inventor： SIEGERT, Markus ,  LANG, Neven ,  STROEFER, Eckhard ,  STAMMER, Achim ,  FRIESE, Thorsten ,  HASSE, Hans

    IPC: C07D323/06

    CPC classification number: C07D323/06

    Abstract: The invention relates to a method for separating trioxane from an inlet flow (I) consisting of formaldehyde, trioxane and water. Said method consists in a) preparing an inlet flow (I), which contains formaldehyde as the main component and trioxane and water as auxiliary components, b) mixing the inlet flow (I) with a return flow (VII) containing trioxane as the main component and formaldehyde and water as auxiliary components. An inlet flow (Ia), which contains formaldehyde as the main component and trioxane and water as the auxiliary components, is obtained. Said method also consists in c) distilling the inlet flow (Ia) in a first distillation step at a pressure of between 0.1 2.5 bars, thus enabling a flow (II), which contains formaldehyde as the main component and water as the auxiliary component, and a flow (III), which contains trioxane as the main component and water and formaldehyde as the auxiliary components, to be obtained, d) distilling the flow (III), optionally after separating materials at a low-boiling point from the flow (III) in a low-boiling separation step and in a second distillation step at a pressure of between 0.2 17.5 bars, whereby the pressure in the second distillation step is 0.1 - 15 bars higher than the pressure in the first distillation step. A flow (IV) is obtained which is essentially made of trioxane, and also a flow V which contains trioxane as the main component and water and formaldehyde as the auxiliary components, e) optionally mixing the flow (V) with a flow (IX), which contains water as the main component, in order to obtain a flow (Va) having a higher water content than flow (V), whereby flow (Va) contains trioxane as the main component and water and formaldehyde as the auxiliary components, f) distilling the flow (V) and/or flow (Va) in a third in distillation step at a pressure of between 1 - 10 bars, whereby a flow (VI), which is essentially made of water, and the return flow (VII), which contains trioxane as the main component and water and formaldehyde as the auxiliary components, are obtained.

    VERFAHREN ZUR HERSTELLUNG VON DIOXOLAN
    47.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON DIOXOLAN 有权
    用于生产二氧

    公开(公告)号：EP1931650A1

    公开(公告)日：2008-06-18

    申请号：EP06793286.3

    申请日：2006-09-06

    Applicant: BASF SE

    Inventor： SIEGERT, Markus ,  LANG, Neven ,  STRÖFER, Eckhard ,  STAMMER, Achim

    IPC: C07D317/12

    CPC classification number: C07D317/12 ,  Y02P20/127

    Abstract: Disclosed is a method for producing dioxolane by reacting ethylene glycol (1) with formaldehyde in aqueous solution (2) in the presence of catalysts. Said method is characterized in that the reaction is carried out in a reactive distillation column (RDK). The educts ethylene glycol (1) and aqueous formaldehyde (2) are fed to the reactive distillation column (RDK) in the central zone thereof, and a flow (3) containing dioxolane is withdrawn from the top zone of the reactive distillation column (RDK) while a bottom flow (4) containing components that are high-boiling compared to dioxolane is withdrawn.

    INTEGRIERTES VERFAHREN ZUR HERSTELLUNG VON TRIOXAN AUS FORMALDEHYD
    48.
    发明公开
    INTEGRIERTES VERFAHREN ZUR HERSTELLUNG VON TRIOXAN AUS FORMALDEHYD 有权

    公开(公告)号：EP1915358A1

    公开(公告)日：2008-04-30

    申请号：EP06778089.0

    申请日：2006-08-01

    Applicant: BASF SE

    Inventor： LANG, Neven ,  STRÖFER, Eckhard ,  STAMMER, Achim ,  FRIESE, Thorsten ,  SIEGERT, Markus ,  HASSE, Hans ,  GRÜTZNER, Thomas ,  BLAGOV, Sergej

    IPC: C07D323/06

    CPC classification number: C07D323/06 ,  Y02P20/125

    Abstract: The invention relates to an integrated method for producing trioxane from formaldehyde. According to said method, a flow A1 containing water and formaldehyde as well as a recirculation flow B2 substantially composed of water and formaldehyde are delivered to a trioxane synthesis reactor in which the formaldehyde is reacted to trioxane such that a product flow A2 containing trioxane, water, and formaldehyde is obtained. Flow A2 and a recirculation flow D1 containing trioxane, water, and formaldehyde are fed to a first distillation column and are distilled at a pressure ranging from 0.1 to 2.5 bar such that a trioxane-enriched flow B1 and flow B2, which is essentially composed of water and formaldehyde, are obtained. Flow B1 is delivered to a second distillation column and is distilled at a pressure ranging from 0.2 to 17.5 bar such that a product flow substantially comprising trioxane and a flow C1 containing trioxane, water, and formaldehyde are obtained. Flow C1 is fed to a third distillation column and is distilled at a pressure ranging from 1 to 10 bar such that the recirculation flow D1 containing trioxane, water, and formaldehyde as well as a flow D2 that is substantially composed of water are obtained.

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