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    21.
    发明专利
    未知

    公开(公告)号：BRPI0615856A2

    公开(公告)日：2012-12-18

    申请号：BRPI0615856

    申请日：2006-09-06

    Applicant: BASF SE

    Inventor： STROEFER EICKHARD ,  STAMMER ACHIM ,  SIEGERT MARKUS ,  LANG NEVEN

    IPC: C07D317/12

    Abstract: Processes comprising: providing a reactive distillation column having an upper region, a middle region and a lower region; feeding ethylene glycol and an aqueous formaldehyde solution into the reactive distillation column in the middle region of the reactive distillation column; reacting the ethylene glycol and the aqueous formaldehyde solution in the reactive distillation column in the presence of a catalyst to form dioxolane; removing a product stream comprising dioxolane in an amount of at least 75% by weight from the upper region of the reactive distillation column; and removing a bottom stream comprising one or more components having boiling points higher than dioxolane from the lower region of the reactive distillation column.

    24.
    发明专利
    未知

    公开(公告)号：NO20080971L

    公开(公告)日：2008-03-14

    申请号：NO20080971

    申请日：2008-02-26

    Applicant: BASF SE

    Inventor： STAMMER ACHIM ,  LANG NEVEN ,  ZOLLNER KNUT ,  STOCKELMANN ELMAR

    IPC: C08G2/10 ,  C07D323/06 ,  C08G2/28

    Abstract: A process for preparing polyoxymethylene homopolymers or copolymers by homopolymerization or copolymerization of trioxane or additionally of suitable comonomers, in which trioxane which still comprises residual monomers is firstly prepared in a monomer plant and is degassed in one or more stages to give one or more vapor streams ( 13, 14 ) which are, if appropriate, fed to a condenser (K) in which the condensable fractions of these vapor streams are condensed to give a condensate ( 15 ) which is recycled to the polymerization reactor (P) and one or more gaseous, formaldehyde-comprising streams ( 16 ) and also a partially degassed polyoxymethylene homopolymer or copolymer ( 17 ) which is fed to an extruder (E) or kneader and is mixed with customary additives and processing aids in this to give a polymer melt ( 19 ) and extraction of a formaldehyde-comprising extruder or kneader offgas ( 18 ) from the extruder (E) or kneader, wherein the formaldehyde-comprising secondary streams ( 14, 16, 18 ) from the polymer plant are recycled directly without addition of auxiliaries to the monomer plant, is proposed

    Process for producing trioxane and at least one comonomer
    26.
    发明专利
    Process for producing trioxane and at least one comonomer 未知

    公开(公告)号：AU2006310554A1

    公开(公告)日：2007-05-10

    申请号：AU2006310554

    申请日：2006-10-27

    Applicant: BASF SE

    Inventor： OLDENBURG JAN ,  BOHLING RALF ,  LANG NEVEN ,  STAMMER ACHIM ,  SIEGERT MARKUS ,  STROFER ECKHARD

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

    Abstract: Preparation of trioxane and at least a comonomer for the preparation of (co)polymer on trioxane basis, comprises (a) converting formaldehyde and at least a co-monomer educt to trioxane and co-monomer in an aqueous solution to obtain a reaction mixture; (b) distilling the reaction mixture in a first distillation step at a first pressure to obtain stream (B1) and a stream (B2); and (c) distilling the stream (B1) in a second distillation step to obtain stream (C1) containing trioxane, co-monomer and water, and a product stream (C2) containing co-monomer and trioxane. Preparation of trioxane and at least a co-monomer for the preparation of (co)polymer on trioxane basis, comprises: (a) converting formaldehyde and at least a co-monomer educt to trioxane and co-monomer in an aqueous solution to obtain a reaction mixture containing trioxane, co-monomer, formaldehyde, water and optionally co-monomer educt, by synthesis step; (b) distilling the reaction mixture in a first distillation step at a first pressure to obtain stream (B1) enriched with trioxane and comonomer, and a stream (B2) containing water, formaldehyde and optionally comonomer-educt; and (c) distilling the stream (B1) in a second distillation step at a pressure above the pressure of the first distillation step to obtain stream (C1) containing trioxane, co-monomer and water, and a product stream (C2) containing co-monomer and trioxane.

    Procedimiento para producir poliamidas de alta viscosidad
    28.
    发明专利
    Procedimiento para producir poliamidas de alta viscosidad 未知

    公开(公告)号：ES2849428T3

    公开(公告)日：2021-08-18

    申请号：ES14724349

    申请日：2014-04-30

    Applicant: BASF SE

    Inventor： HÄFFNER RÜDIGER ,  GRÜTZNER ROLF-EGBERT ,  STAMMER ACHIM ,  ULZHÖFER ANGELA

    IPC: C08G69/06 ,  C08G69/30 ,  C08L77/06

    Abstract: Procedimiento para producir poliamidas, el cual comprende una post-polimerización en fase sólida de un prepolímero de poliamida, donde el prepolímero de poliamida antes y/o durante la post-polimerización en fase sólida se pone en contacto con una composición acuosa que comprende al menos los siguientes componentes: A) al menos un primer compuesto seleccionado del grupo compuesto por ácido fosfórico, sales totalmente neutralizadas del ácido fosfórico, sales parcialmente neutralizadas del ácido fosfórico y mezclas de los mismos, y B) al menos un segundo compuesto distinto de A), donde el componente B) comprende ácido succínico o anhídrido succínico, o se compone de ácido succínico o anhídrido succínico, y donde la puesta en contacto del prepolímero de poliamida con la composición acuosa tiene lugar a una temperatura y a una presión, en las cuales la composición acuosa es líquida, donde la relación molar del componente B, con respecto a los grupos reactivos del prepolímero, es de 1:50 a 1:5.

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