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    71.
    发明专利
    未知

    公开(公告)号：BRPI0713605A2

    公开(公告)日：2012-11-06

    申请号：BRPI0713605

    申请日：2007-06-13

    Applicant: BASF SE

    Inventor： DIENES CHRISTIAN ,  KRUEGER MARCO ,  MUESSIG STEFAN ,  ERBES JOERG ,  STAMMER ACHIM ,  WEBER MARTIN ,  WABMER KARL-HEINZ ,  LANGE GERHARD

    IPC: C08G75/23 ,  C08G75/20

    Abstract: The present invention relates to a process for the preparation of polysulfones having a yellowness index according to DIN 6167 of less than 19 and polyether sulfones having a yellowness index according to DIN 6167 of less than 30, wherein the polymerization is carried out in basic, aprotic solvents with the use of a positively conveying stirrer passing close to the wall. The present invention also relates to the polyether sulfones and polysulfones obtainable for the first time by this process and to the use of such polymers for the production of moldings, films, membranes and foams.

    PROCEDIMIENTO INTEGRADO PARA LA OBTENCION DE TRIOXANO A PARTIR DE FORMALDEHIDO.
    73.
    发明专利
    PROCEDIMIENTO INTEGRADO PARA LA OBTENCION DE TRIOXANO A PARTIR DE FORMALDEHIDO. 未知

    公开(公告)号：ES2317574T3

    公开(公告)日：2009-04-16

    申请号：ES06778089

    申请日：2006-08-01

    Applicant: BASF SE

    Inventor： LANG NEVEN ,  STROFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN ,  SIEGERT MARKUS ,  HASSE HANS

    IPC: C07D323/06

    Abstract: Procedimiento integrado para la obtención de trioxano a partir de formaldehído, que comprende las etapas siguientes: a) se alimentan a un reactor para la síntesis de trioxano una corriente A1, que contiene agua y formaldehído, y una corriente de reciclo B2, que está constituida esencialmente por agua y por formaldehído, en cuyo reactor se convierte el formaldehído para dar trioxano, obteniéndose una corriente de producto A2, que contiene trioxano, agua y formaldehído; b) la corriente A2 se alimenta en una primera columna de destilación como alimentación lateral en la sección de agotamiento y una corriente de reciclo D1, que contiene trioxano, agua y formaldehído, se alimenta en una primera columna de destilación como alimentación lateral en la sección de enriquecimiento, y se lleva a cabo la destilación a una presión situada en el intervalo comprendido entre 0,1 y 2,5 bares, obteniéndose una corriente B1, que está enriquecida en trioxano, y la corriente B2, que está constituida esencialmente por agua y por formaldehído; c) la corriente B1 se alimenta a una segunda columna de destilación y se lleva a cabo la destilación a una presión situada en el intervalo comprendido 0,2 y 17,5 bares, obteniéndose una corriente de producto C2, que está constituida esencialmente por trioxano, y una corriente C1, que contiene trioxano, agua y formaldehído; d) la corriente C1 se alimenta a una tercera columna de destilación y se lleva a cabo la destilación a una presión situada en el intervalo comprendido entre 1 y 10 bares, obteniéndose la corriente de reciclo D1, que contiene trioxano, agua y formaldehído, y una corriente D2 que está constituida esencialmente por agua.

    74.
    发明专利
    未知

    公开(公告)号：DE502006002395D1

    公开(公告)日：2009-01-29

    申请号：DE502006002395

    申请日：2006-08-01

    Applicant: BASF SE

    Inventor： LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN ,  SIEGERT MARKUS ,  HASSE HANS ,  GRUETZNER THOMAS ,  BLAGOV SERGEJ

    IPC: C07D323/06

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which, in a first step, a stream A 1 comprising water and formaldehyde and a recycle stream B 2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A 2 comprising trioxane, water and formaldehyde. Stream A 2 and a recycle stream D 1 comprising trioxane, water and formaldehyde are fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B 1 enriched in trioxane, and the stream B 2 consisting substantially of water and formaldehyde. Stream B 1 is fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C 2 consisting substantially of trioxane, and a stream C 1 comprising trioxane, water and formaldehyde. Stream C 1 is fed to a third distillation column and distilled at a pressure in the range from 1 to 10 bar to obtain the recycle stream D 1 comprising trioxane, water and formaldehyde, and a stream D 2 consisting substantially of water.

    75.
    发明专利
    未知

    公开(公告)号：NO20081897L

    公开(公告)日：2008-05-27

    申请号：NO20081897

    申请日：2008-04-22

    Applicant: BASF SE

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

    IPC: C08G2/10 ,  C07D317/12 ,  C07D323/06 ,  C08G2/20

    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.

    76.
    发明专利
    未知

    公开(公告)号：NO20081132L

    公开(公告)日：2008-05-08

    申请号：NO20081132

    申请日：2008-03-04

    Applicant: BASF SE

    Inventor： STROFER ECKHARD ,  STAMMER ACHIM ,  LANG NEVEN ,  SIEGERT MARKUS

    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.

    Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification
    78.
    发明专利
    Method for separating trioxane from a trioxane/formaldehyde/water mixture by means of pressure change rectification 未知

    公开(公告)号：MXPA06007121A

    公开(公告)日：2006-10-01

    申请号：MXPA06007121

    申请日：2006-06-21

    Applicant: BASF SE

    Inventor： SIEGERT MARKUS ,  LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN ,  HASSE HANS

    IPC: C07D323/06

    Abstract: A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by a) providing a use stream I of formaldehyde as the main component and trioxane and water as the secondary components, b) mixing the use stream I with a recycle stream VII to obtain a feed stream Ia, c) distilling the use stream Ia in a first distillation stage to obtain a stream II of formaldehyde as the main component and water as the secondary component, and a stream III of trioxane as the main component and water and formaldehyde as the secondary components, d) distilling the stream III in a second distillation stage having a pressure higher than in the first distillation stage, to obtain a stream IV of trioxane and a stream V of trioxane as the main component and water and formaldehyde as the secondary components, e) distilling the stream V in a third distillation stage to obtain a stream VI of water and the recycle stream VII of trioxane as the main component and water and formaldehyde as the secondary components.

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