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    PROCESS FOR ISOLATING METHYLGLYCINENITRILE-N,N-DIACETONITRILES FROM AN AQUEOUS CRUDE MIXTURE
    2.
    发明专利
    PROCESS FOR ISOLATING METHYLGLYCINENITRILE-N,N-DIACETONITRILES FROM AN AQUEOUS CRUDE MIXTURE 未知

    公开(公告)号：CA2607246A1

    公开(公告)日：2006-11-16

    申请号：CA2607246

    申请日：2006-05-03

    Applicant: BASF AG

    Inventor： RAULS MATTHIAS ,  OFTRING ALFRED ,  JUDAT BERND ,  FRIESE KATRIN

    IPC: C07C253/34 ,  C07C255/24 ,  C07C255/25

    Abstract: The invention relates to a process for isolating methylglycinenitrile-N,N-diacetonitrile (MGDN) from an aqueous emulsion which comprises MGDN and has an MGDN content of 3-50% by weight in a crystallizer, comprising the steps: (a) the aqueous emulsion is, starting from a temperature above the solidification point, cooled to a temperature below the solidification point, the cooling rate averaged over time not exceeding 5 K/h, until substantially the entirety of the emulsified MGDN has solidified, (b) the resulting aqueous suspension is cooled further and/or concentrated, and the cooling rate may be greater than in step (a).

    METHOD FOR PRODUCING PURE TRIOXANE
    3.
    发明专利
    METHOD FOR PRODUCING PURE TRIOXANE 未知

    公开(公告)号：AU2003232760A1

    公开(公告)日：2003-12-02

    申请号：AU2003232760

    申请日：2003-05-13

    Applicant: BASF AG

    Inventor： FRIESE KATRIN ,  RAULS MATTHIAS ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  ARMBRUSTER HARALD ,  ZEINER HARTMUT ,  EGBERS GITTA ,  STROFER ECKHARD ,  HECK LUDWIG ,  HILDENBRAND PETER

    IPC: C07D323/06

    Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.

    7.
    发明专利
    未知

    公开(公告)号：BRPI0611306A2

    公开(公告)日：2011-02-22

    申请号：BRPI0611306

    申请日：2006-05-03

    Applicant: BASF AG

    Inventor： JUDAT BERND ,  RAULS MATTHIAS ,  OFTRING ALFRED ,  FRIESE KATRIN

    IPC: C07C253/34 ,  C07C255/24 ,  C07C255/25

    Abstract: The invention relates to a process for isolating methylglycinenitrile-N,N-diacetonitrile (MGDN) from an aqueous emulsion which comprises MGDN and has an MGDN content of 3-50% by weight in a crystallizer, comprising the steps: (a) the aqueous emulsion is, starting from a temperature above the solidification point, cooled to a temperature below the solidification point, the cooling rate averaged over time not exceeding 5 K/h, until substantially the entirety of the emulsified MGDN has solidified, (b) the resulting aqueous suspension is cooled further and/or concentrated, and the cooling rate may be greater than in step (a).

    8.
    发明专利
    未知

    公开(公告)号：NO20075642L

    公开(公告)日：2008-01-29

    申请号：NO20075642

    申请日：2007-11-06

    Applicant: BASF AG

    Inventor： OFTRING ALFRED ,  JUDAT BERND ,  RAULS MATTHIAS ,  FRIESE KATRIN

    IPC: C07C253/34 ,  C07C255/25

    Abstract: The invention relates to a process for isolating methylglycinenitrile-N,N-diacetonitrile (MGDN) from an aqueous emulsion which comprises MGDN and has an MGDN content of 3-50% by weight in a crystallizer, comprising the steps: (a) the aqueous emulsion is, starting from a temperature above the solidification point, cooled to a temperature below the solidification point, the cooling rate averaged over time not exceeding 5 K/h, until substantially the entirety of the emulsified MGDN has solidified, (b) the resulting aqueous suspension is cooled further and/or concentrated, and the cooling rate may be greater than in step (a).

    METODO PARA AISLAR METILGLICINANITRILO-N, N-DIACETONITRILOS DE UNA MEZCLA CRUDA ACUOSA.
    10.
    发明专利
    METODO PARA AISLAR METILGLICINANITRILO-N, N-DIACETONITRILOS DE UNA MEZCLA CRUDA ACUOSA. 未知

    公开(公告)号：MX2007013698A

    公开(公告)日：2008-01-21

    申请号：MX2007013698

    申请日：2006-05-03

    Applicant: BASF AG

    Inventor： OFTRING ALFRED ,  FRIESE KATRIN ,  RAULS MATTHIAS ,  JUDAT BERND

    IPC: C07C253/34 ,  C07C255/24 ,  C07C255/25

    Abstract: La invencion se relaciona con un proceso para aislar metilglicinanitrilo-N,N-diacetonitrilo (MGDN) de una emulsion acuosa que comprende MGDN y tiene un contenido de MGDN de 3-50% en peso en un cristalizador, que comprende los pasos: (a) la emulsion acuosa, empezando de una temperatura superior al punto de solidificacion, se enfria a una temperatura inferior al punto de solidificacion, el regimen de enfriamiento promediado sobre el tiempo no excediendo 5 K/h, hasta que substancialmente la totalidad del MGDN emulsionado se ha solidificado, (b) la suspension acuosa resultante se enfria adicionalmente y/o concentra, y el regimen de enfriamiento puede ser mayor que en el paso (a). (Figura 2).

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