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    Method for producing formaldehyde
    41.
    发明专利
    Method for producing formaldehyde 未知

    公开(公告)号：NZ547317A

    公开(公告)日：2010-09-30

    申请号：NZ54731704

    申请日：2004-12-23

    Applicant: BASF AG

    Inventor： OLBERT GERHARD ,  JOHANN THORSTEN ,  WEBER MARKUS ,  LANG NEVEN ,  STROEFER ECKHARD ,  FIENE MARTIN ,  SIEGERT MARKUS

    IPC: B01J19/24 ,  B01J8/02 ,  B01J8/04 ,  C07C45/38 ,  F28D9/00

    Abstract: A method for the production of formaldehyde by gas phase oxidation of methanol vapour with a gas flow containing a molecular oxygen in the presence of solid bed catalyst containing iron and molybdenum is carried out in a reactor (1) comprising thermal sheet metal plates (2) which are arranged in the longitudinal direction of the reactor (1) and spaced from each other. A heat transfer medium flows through the gaps between the plates. The heat transfer medium is transferred via inlets and outlets 3, 4 to the thermal sheet steel plates (2), and gaps (5) between the thermal sheet steel metal plates (2) and which are filled with the solid bed catalyst and into which the gas containing the methanol vapour and the molecular oxygen flows.

    43.
    发明专利
    未知

    公开(公告)号：NO20080303L

    公开(公告)日：2008-02-29

    申请号：NO20080303

    申请日：2008-01-16

    Applicant: BASF AG

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

    IPC: C07D323/06

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which a stream A1 comprising water and formaldehyde and a recycle stream B2 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 A2 comprising trioxane, water and formaldehyde; stream A2 is 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 B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde; stream B1 and a recycle stream D1 comprising trioxane, water and formaldehyde are 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 C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde; stream C1 is fed to a third distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain the recycle stream D1 comprising trioxane, water and formaldehyde, and a stream D2 consisting substantially of water and formaldehyde.

    46.
    发明专利
    未知

    公开(公告)号：BRPI0511449A

    公开(公告)日：2007-12-26

    申请号：BRPI0511449

    申请日：2005-05-21

    Applicant: BASF AG

    Inventor： WOELFERT ANDREAS ,  PALLASCH HANS-JUERGEN ,  STROEFER ECKHARD ,  PENZEL ULRICH ,  DEBERDT FILIP

    IPC: C07C263/10 ,  C07C265/12 ,  C07C265/14

    Abstract: A process for the preparation of isocyanates by reacting amines with phosgene, the phosgene-containing stream of starting materials (i) being substantially free of isocyanates and (ii) having a mass content of hydrogen chloride (referred to below as HCl) of less than 0.4% by mass, and a production plant for carrying out the process according to the invention.

    47.
    发明专利
    未知

    公开(公告)号：AT372317T

    公开(公告)日：2007-09-15

    申请号：AT05700737

    申请日：2005-01-07

    Applicant: BASF AG

    Inventor： KNOESCHE CARSTEN ,  SOHN MARTIN ,  PENZEL ULRICH ,  PALLASCH HANS-JUERGEN ,  GEORGI GUNTER ,  MACKENROTH WOLFGANG ,  SCHWARZ HANS VOLKMAR ,  MAIXNER STEFAN ,  MOLZ GERALD ,  STROEFER ECKHARD

    IPC: C07C209/84 ,  C07C211/50

    Abstract: The invention relates to a process for distillatively preparing TDA from a reactant stream comprising TDA, high boilers and low boilers in a dividing wall column in which a dividing wall is disposed in the longitudinal direction of the column to form an upper combined column region ( 2 ), a lower combined column region ( 3 ), a feed section ( 4 ) having a rectifying section ( 5 ) and stripping section ( 6 ), and also a withdrawal section ( 7 ) having a rectifying section ( 9 ) and stripping section ( 8 ), which comprises the following steps: a. feeding the reactant stream ( 13 ) into the feed section ( 4 ) of the dividing wall column ( 1 ); b. drawing off a low boiler fraction via the top of the column ( 11 ); c. drawing off TDA via a side draw ( 14 ) in the withdrawal section ( 7 ) of the dividing wall column ( 1 ); d. drawing off a low boiler fraction via the bottom of the column ( 12 ).

    48.
    发明专利
    未知

    公开(公告)号：BRPI0418083A

    公开(公告)日：2007-04-17

    申请号：BRPI0418083

    申请日：2004-12-21

    Applicant: BASF AG

    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.

    49.
    发明专利
    未知

    公开(公告)号：DE102005042505A1

    公开(公告)日：2007-03-08

    申请号：DE102005042505

    申请日：2005-09-07

    Applicant: BASF AG

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

    IPC: C07D317/08

    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.

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