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    PROCEDIMIENTO PARA LA SEPARACION MEZCLAS LIQUIDAS DE PRODUCTOS EN UN EVAPORADOR DE PELICULA.
    11.
    发明专利
    PROCEDIMIENTO PARA LA SEPARACION MEZCLAS LIQUIDAS DE PRODUCTOS EN UN EVAPORADOR DE PELICULA. 未知

    公开(公告)号：ES2320587T3

    公开(公告)日：2009-05-25

    申请号：ES06112810

    申请日：2004-03-03

    Applicant: BASF SE

    Inventor： STROFER ECKHARD ,  LANG NEVEN ,  LICHTFERS UTE ,  STEINBRENNER ULRICH ,  HASSE HANS

    IPC: B01D1/22 ,  B01D1/30 ,  C08G2/08

    Abstract: Procedimiento para la separación de una mezcla líquida de productos, que contiene, al menos, un componente fácilmente volátil y, al menos, un componente difícilmente volátil, en un evaporador de película, según el cual (i) se prepara una corriente continua de una mezcla de partida líquida, (ii) se genera a partir de la corriente continua una película líquida y se pone en contacto con una superficie intercambiadora de calor del evaporador de película, (iii) la película líquida se evapora en parte, con lo que se obtiene una corriente gaseosa enriquecida en componentes fácilmente volátiles y una corriente líquida enriquecida en componentes difícilmente volátiles, estando (iv) la superficie intercambiadora de calor recubierta con un material catalíticamente activo, que (v) cataliza una reacción química en la película líquida, en la que se forma, al menos, un componente fácilmente volátil, caracterizado porque la mezcla líquida de los productos de partida es una solución acuosa de formaldehído, los componentes fácilmente volátiles se eligen entre el grupo constituido por el formaldehído libre (CH2O), el metilenglicol (HOCH2OH) y el agua, los componentes difícilmente volátiles se eligen entre el grupo constituido por los polioximetilenglicoles (HO(CH 2O) nH) con 2 hasta 20 unidades de oximetileno (n = 2 - 20), y la reacción química catalizada es la condensación catalizada con ácidos o con bases del metilenglicol y de los polioximetilenglicoles, formándose a partir de polioximetilenglicoles de bajo peso molecular polioximetilenglicoles de elevado peso molecular y formándose agua como componente fácilmente volátil.

    12.
    发明专利
    未知

    公开(公告)号：DE502004009159D1

    公开(公告)日：2009-04-23

    申请号：DE502004009159

    申请日：2004-03-03

    Applicant: BASF SE

    Inventor： STROEFER ECKHARD ,  LANG NEVEN ,  LICHTFERS UTE ,  STEINBRENNER ULRICH ,  HASSE HANS

    IPC: B01D1/22 ,  B01D1/30 ,  C08G2/08

    Abstract: A method for separating a liquid mixture containing readily-volatile and sparingly-volatile components involves using a film evaporator with a heat-exchange surface which is coated with material which catalyses the formation of readily-volatile component(s) in the liquid film. A method for separating a liquid mixture containing (A) readily-volatile and (B) sparingly-volatile components in a film evaporator by (i) producing a continuous stream of a liquid starting mixture, (ii) producing a liquid film from the mixture and bringing it into contact with a heat-exchange surface of the evaporator, and (iii) partly evaporating the film to give two gas streams rich in (A) and (B) respectively. In this method, (iv) the heat-exchange surface is coated with a catalytic material and (v) a chemical reaction in which (A) is/are formed is catalysed in the liquid film. An independent claim is also included for a film evaporator with a heat-exchanger wall which is coated with catalytic material.

    15.
    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
    16.
    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.

    19.
    发明专利
    未知

    公开(公告)号：BRPI0808459A2

    公开(公告)日：2014-07-15

    申请号：BRPI0808459

    申请日：2008-01-23

    Applicant: BASF SE

    Inventor： LANG NEVEN ,  THIEL JOACHIM ,  STROEFER ECKHARD ,  KIRSCHBAUM JULIA ,  SIEGERT MARKUS

    IPC: B01D3/14 ,  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 which comprises formaldehyde as the main component and trioxane and water as the secondary components, b) feeding the use stream I, a recycle stream V and a recycle stream VII which comprises formaldehyde as the main component and water and trioxane as the secondary components into a first distillation stage and distilling to obtain a stream II a steam III and formaldehyde as the and a steam X c) distilling the stream III, in a second distillation stage the pressure in the second distillation stage being from 0.1 to 15 bar higher than the pressure in the first distillation stage, to obtain a stream IV and the recycle stream V as the secondary components, d) feeding the stream X and if appropriate a stream IX into a third distillation stage and distilling at a pressure of from 1 to 10 bar to obtain a stream VI which consists substantially of water and a recycle stream VII which comprises formaldehyde as the main component and water and trioxane as the secondary components.

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