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    VERFAHREN ZUR ABTRENNUNG VON TRIOXAN AUS EINEM TRIOXAN/FORMALDEHYD/WASSER-GEMISCH MITTELS DRUCKWECHSEL-REKTIFIKATION
    1.
    发明公开
    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：EP2197870A1

    公开(公告)日：2010-06-23

    申请号：EP08804546.3

    申请日：2008-09-22

    申请人： BASF SE

    发明人： SIEGERT, Markus ,  LANG, Neven ,  SZARVAS, Laszlo ,  SIGWART, Christoph ,  WINDLIN, Franz Niklaus ,  STRÖFER, Eckhard

    IPC分类号： C07D323/06 ,  B01D3/14

    CPC分类号： C07D323/06

    摘要： The invention describes a method for separating trioxane from a supply flow I of formaldehyde, trioxane, and water, wherein a) a supply flow I containing formaldehyde as the main component and trioxane and water as the secondary components, is provided, b) the supply flow, a return flow V, and a return flow VII containing formaldehyde as the main component and water and trioxane as the secondary components, are fed into a first distillation step and are distilled at a pressure of 0.1 to 2.5 bars, wherein a flow II containing formaldehyde as the main component and water as the secondary component, and a flow III containing trioxane as the main component and water and formaldehyde as the secondary components, and a flow X containing water, trioxane and formaldehyde, are obtained, c) the flow III, optionally after separating low boilers from the flow III in a low boiler separating step, is distilled in a second distillation step at a pressure of 0.2 to 17.5 bars, wherein the pressure in the second distillation step is higher than the pressure in the first distillation step by 0.1 to 15 bars, wherein a flow IV, substantially consisting of trioxane, and the return flow V containing trioxane as the main component and water and formaldehyde as the secondary components, are obtained, d) the flow IV is purified in at least one further trioxane distillation step at a head pressure of 0.5 to 2 bars, wherein purified trioxane is obtained as the lateral removal flow is obtained in the reinforcement part of the column, d) the flow X, and optionally a flow IX containing water as the main component, are fed into a third distillation step and distilled at a pressure of 1 to 10 bars, wherein a flow VI substantially consisting of water, and a return flow VII containing formaldehyde as the main component and water and trioxane as the secondary component, are obtained.

    VERFAHREN ZUR HERSTELLUNG VON DIOXOLAN
    5.
    发明授权
    VERFAHREN ZUR HERSTELLUNG VON DIOXOLAN 有权
    用于生产二氧

    公开(公告)号：EP1931650B1

    公开(公告)日：2010-11-24

    申请号：EP06793286.3

    申请日：2006-09-06

    申请人： BASF SE

    发明人： SIEGERT, Markus ,  LANG, Neven ,  STRÖFER, Eckhard ,  STAMMER, Achim

    IPC分类号： C07D317/12

    CPC分类号： C07D317/12 ,  Y02P20/127

    摘要： 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.

    VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENHOMO- ODER -COPOLYMEREN DURCH HOMO- ODER COPOLYMERISATION VON TRIOXAN, AUSGEHEND VON METHANOL
    6.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON POLYOXYMETHYLENHOMO- ODER -COPOLYMEREN DURCH HOMO- ODER COPOLYMERISATION VON TRIOXAN, AUSGEHEND VON METHANOL 审中-公开
    PROCESS FOR通过均聚或三恶烷共聚PRODUCING聚甲醛均聚物或共聚物，起动FROM甲醇

    公开(公告)号：EP2225296A1

    公开(公告)日：2010-09-08

    申请号：EP08861536.4

    申请日：2008-12-11

    申请人： BASF SE

    发明人： SIEGERT, Markus ,  KORTEKAMP, Tobias ,  STROEFER, Eckhard ,  SIGWART, Christoph ,  LANG, Neven

    IPC分类号： C08G2/10 ,  C07D323/06

    CPC分类号： C07D323/06 ,  C08G2/10

    摘要： Disclosed is a method for producing polyoxymethylene homopolymers or copolymers (7) by homopolymerizing or copolymerizing trioxane, starting from methanol (1) that is oxidized in a first reactor of a first production system (A) such that an aqueous formaldehyde-containing stream (2) is obtained that is fed to a second production system (B) in which pure trioxane (6) is obtained. In said method, low-boiling fractions (5) are separated by distillation, and the pure trioxane (6) is fed to a third production system (C) in which the pure trioxane (6) is homopolymerized or copolymerized to obtain polyoxymethylene homopolymers or copolymers (7). The disclosed method is characterized in that the stream of low-boiling fractions (5) is recycled from the column (K 2) separating low-boiling fractions into the inlet of the first reactor in the first production system (A).

    VERFAHREN ZUR HERSTELLUNG VON TRIOXAN UND MINDESTENS EINEM COMONOMER
    7.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON TRIOXAN UND MINDESTENS EINEM COMONOMER 审中-公开
    用于生产恶烷和至少一种共聚单体

    公开(公告)号：EP1945689A1

    公开(公告)日：2008-07-23

    申请号：EP06807603.3

    申请日：2006-10-27

    申请人： BASF SE

    发明人： LANG, Neven ,  BÖHLING, Ralf ,  STAMMER, Achim ,  OLDENBURG, Jan ,  SIEGERT, Markus ,  STRÖFER, Eckhard

    IPC分类号： C08G2/10 ,  C07D323/06 ,  C07D317/12 ,  C07D319/00

    CPC分类号： C08G2/10 ,  C07D317/12 ,  C07D323/06 ,  C08G2/20 ,  Y02P20/127 ,  Y02P20/582

    摘要： The invention relates to a process for producing trioxane and at least one comonomer for producing (co)polymers on a trioxane basis, in which, in a first step, formaldehyde and at least one comonomer starting material are reacted in aqueous solution to form trioxane and comonomer, wherein a reaction mixture A1 containing trioxane, comonomer, formaldehyde, water and if appropriate comonomer starting material is obtained. In a second step, the reaction mixture A1 is distilled in a first distillation stage at a first pressure, wherein a trioxane- and comonomer-enriched stream B1 and an essentially water-, formaldehyde- and if appropriate comonomer starting material-containing stream B2 are obtained. In a third step, the stream B1 is distilled in a second distillation stage at a pressure which is above the pressure of the first distillation stage, wherein a trioxane-, comonomer- and water-containing stream C1 and a product stream C2 essentially consisting of comonomer and trioxane are obtained.