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    Process for preparing polyoxymethylene dimethyl ethers from methanol and formaldehyde
    132.
    发明专利
    Process for preparing polyoxymethylene dimethyl ethers from methanol and formaldehyde 未知

    公开(公告)号：AU2006310719A1

    公开(公告)日：2007-05-10

    申请号：AU2006310719

    申请日：2006-06-12

    Applicant: BASF AG

    Inventor： BLAGOV SERGEJ ,  HASSE HANS ,  STROEFER ECKHARD

    IPC: C08G65/00

    Abstract: Preparing tri-/tetra oxymethylene glycol dimethylether (I) comprises e.g. distilling an aqueous formaldehyde solution and methanol in a reactor to form a reaction mixture containing polyoxy methylene glycol dimethylether (III); distilling the reaction mixture to form a high-boiling fraction (A2) containing e.g. (III); distilling (A2) to form e.g. a low-boiling fraction (A3) having e.g. (I); distilling (A3) to form a high-boiling fraction (A5) having e.g. (I); and distilling (A5) to form an organic phase containing (I). Preparing tri-/tetra oxymethylene glycol dimethylether through the conversion of formaldehyde with methanol and successive distillation of a reaction mixture, comprises: feeding an aqueous formaldehyde solution and methanol in a reactor to form the reaction mixture containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, methylal and polyoxymethylene glycol dimethylether (III); feeding the reaction mixture into a first distillation column (5) and separating a low-boiling fraction (A1) containing formaldehyde, water, methylene glycol, methanol, methylal and polyoxy methylene glycoldimethylether and a high-boiling fraction (A2) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and (III); feeding (A2) into a second distillation column (8) and separating a low-boiling fraction (A3) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, di-chloroethylene and (I) and a high-boiling containing polyoxymethylene glycol, high-boiling hemiformal and high-boiling polyoxymethylene glycol dimethylether; feeding (A3) and optionally feed-back stream containing formaldehyde, water, methylene glycol and polyoxymethylene glycol into a third distillation column (13) and separating a high volatile fraction (A4) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and dioxymethylene glycol dimethylether and a high-boiling fraction (A5) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol and (I); feeding (A5) in to a phase separator and separating an aqueous phase containing formaldehyde, water, methylene glycol and polyoxymethyleneglycol and an organic phase containing (I); feeding the organic phase into a fourth distillation column (18) and separating a low-boiling fraction (A6) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing (I); and optionally feeding the aqueous phase in a fifth distillation column (24) and separating a low-boiling fraction (A7) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing water.

    METHOD FOR THE PRODUCTION OF DIOXOLANE
    135.
    发明专利
    METHOD FOR THE PRODUCTION OF DIOXOLANE 未知

    公开(公告)号：CA2623594A1

    公开(公告)日：2007-03-15

    申请号：CA2623594

    申请日：2006-09-06

    Applicant: BASF AG

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

    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.

    136.
    发明专利
    未知

    公开(公告)号：DE102005037328A1

    公开(公告)日：2007-02-08

    申请号：DE102005037328

    申请日：2005-08-04

    Applicant: BASF AG

    Inventor： WOELFERT ANDREAS ,  KNOESCHE CARSTEN ,  HEILIG MANFRED ,  STROEFER ECKHARD

    IPC: C07C263/10 ,  C07C263/20 ,  C07C265/00

    Abstract: Diisocyanates production includes supplying gas flow containing diamine and phosgene to reaction zone, separating surplus phosgene and hydrogen chloride gas from gaseous reaction mixture, feeding back the separated phosgene into the reaction, and separating hydrogen chloride (15 wt.%) from the feedback phosgene stream. The mass fraction of hydrogen chloride in the phosgene-containing stream before mixing with the amine-containing stream is less than 15 wt.%. A chlorobenzene inert medium with gas volume of more than 0.0001-30 is added to the diamine- and/or phosgene-containing gas stream. Diisocyanates production includes supplying gas flow containing diamine and phosgene to reaction zone, separating surplus phosgene and hydrogen chloride gas from gaseous reaction mixture, feeding back the separated phosgene into the reaction, and separating hydrogen chloride (15 wt.%) from the feedback phosgene stream. The mass fraction of hydrogen chloride in the phosgene-containing stream before mixing with the amine-containing stream is less than 15 wt.%. A chlorobenzene inert medium with gas volume of more than 0.0001-30 is added to the diamine- and/or phosgene-containing gas stream. The reaction of the diamine with phosgene takes place in a reaction chamber (IV) at 0.1-20 bar and at 200-600[deg]C. The flow in the reaction chamber exhibits Bodenstein number of more than 10. The average contact time of the reaction mixture is 0.001-5 seconds, and the molecular ratio of phosgene to amino groups is 1.1: 1-20: 1. The isocyanate is 1,6-diisocyanatohexane, 1-isocyanato-3,3,5 tri methyl-5-(isocyanatomethyl) cyclohexane, 4,4 '-di(isocyanatocyclohexyl)methane and toluylene diisocyanate isomeric mixtures.

    INTEGRATED PROCESS FOR PREPARING TRIOXANE FROM FORMALDEHYDE
    137.
    发明专利
    INTEGRATED PROCESS FOR PREPARING TRIOXANE FROM FORMALDEHYDE 未知

    公开(公告)号：CA2623572A1

    公开(公告)日：2007-02-08

    申请号：CA2623572

    申请日：2006-07-19

    Applicant: BASF AG

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

    IPC: C07D323/06

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde, comprising the steps of: a) 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 and allowed to react to obtain a product stream A 2 comprising trioxane, water and formaldehyde; b) stream A 2 is fed to a first low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream B 1 enriched in trioxane and additionally comprising water and formaldehyde, and the recycle stream B 2 consisting substantially of formaldehyde and water; c) stream B 1 and a recycle stream D 1 comprising trioxane, water and formaldehyde are fed to a second low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream C 1 comprising predominantly trioxane and additionally formaldehyde and water, and a stream C 2 consisting substantially of formaldehyde and water; d) stream C 1 is fed to a high-pressure distillation column and distilled at a pressure of from 0.2 to 17.5 bar to obtain the recycle stream D 1 and a product stream D 2 consisting substantially of trioxane, in which a removal of the low boilers present in streams B 1 or C 1 may be undertaken between steps b) and c) or c) and d).

    138.
    发明专利
    未知

    公开(公告)号：AT349422T

    公开(公告)日：2007-01-15

    申请号：AT03755040

    申请日：2003-05-19

    Applicant: BASF AG

    Inventor： WOELFERT ANDREAS ,  MUELLER CHRISTIAN ,  STROEFER ECKHARD ,  BRODHAGEN ANDREAS

    IPC: C07C263/10 ,  C07C265/14 ,  B01J19/24

    Abstract: The present invention relates to a continuous process for preparing isocyanates by reacting primary amines with phosgene, wherein the reaction is carried out in a cascade of at least two tube reactors and the gas phase formed in the reaction is separated off in a phase separator after each reactor and only the liquid phase is passed to the next reactor or to product purification and the reaction volume of the first tube reactor is only a fraction of the total reaction volume.

    Preparing tri-/tetra oxymethylene glycol dimethylether comprises distilling an aqueous formaldehyde solution and methanol, distilling the required fractions successively to form organic phase, and distilling the organic phase
    140.
    发明专利
    Preparing tri-/tetra oxymethylene glycol dimethylether comprises distilling an aqueous formaldehyde solution and methanol, distilling the required fractions successively to form organic phase, and distilling the organic phase 未知

    公开(公告)号：DE102005027702A1

    公开(公告)日：2006-12-21

    申请号：DE102005027702

    申请日：2005-06-15

    Applicant: BASF AG

    Inventor： STROEFER ECKHARD ,  HASSE HANS ,  BLAGOV SERGEJ

    IPC: C07C41/56 ,  C07C41/58 ,  C07C43/303

    Abstract: Preparing tri-/tetra oxymethylene glycol dimethylether (I) comprises e.g. distilling an aqueous formaldehyde solution and methanol in a reactor to form a reaction mixture containing polyoxy methylene glycol dimethylether (III); distilling the reaction mixture to form a high-boiling fraction (A2) containing e.g. (III); distilling (A2) to form e.g. a low-boiling fraction (A3) having e.g. (I); distilling (A3) to form a high-boiling fraction (A5) having e.g. (I); and distilling (A5) to form an organic phase containing (I). Preparing tri-/tetra oxymethylene glycol dimethylether through the conversion of formaldehyde with methanol and successive distillation of a reaction mixture, comprises: feeding an aqueous formaldehyde solution and methanol in a reactor to form the reaction mixture containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, methylal and polyoxymethylene glycol dimethylether (III); feeding the reaction mixture into a first distillation column (5) and separating a low-boiling fraction (A1) containing formaldehyde, water, methylene glycol, methanol, methylal and polyoxy methylene glycoldimethylether and a high-boiling fraction (A2) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and (III); feeding (A2) into a second distillation column (8) and separating a low-boiling fraction (A3) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, di-chloroethylene and (I) and a high-boiling containing polyoxymethylene glycol, high-boiling hemiformal and high-boiling polyoxymethylene glycol dimethylether; feeding (A3) and optionally feed-back stream containing formaldehyde, water, methylene glycol and polyoxymethylene glycol into a third distillation column (13) and separating a high volatile fraction (A4) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and dioxymethylene glycol dimethylether and a high-boiling fraction (A5) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol and (I); feeding (A5) in to a phase separator and separating an aqueous phase containing formaldehyde, water, methylene glycol and polyoxymethyleneglycol and an organic phase containing (I); feeding the organic phase into a fourth distillation column (18) and separating a low-boiling fraction (A6) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing (I); and optionally feeding the aqueous phase in a fifth distillation column (24) and separating a low-boiling fraction (A7) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing water.

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