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    PROCESS FOR PREPARING TRIOXANE FROM TRIOXYMETHYLENE GLYCOL DIMETHYL ETHER
    2.
    发明专利
    PROCESS FOR PREPARING TRIOXANE FROM TRIOXYMETHYLENE GLYCOL DIMETHYL ETHER 未知

    公开(公告)号：CA2681976A1

    公开(公告)日：2008-10-09

    申请号：CA2681976

    申请日：2008-03-27

    Applicant: BASF AG

    Inventor： LANG NEVEN ,  STROEFER ECKHARD ,  SIEGERT MARKUS ,  HASSE HANS

    IPC: C07D323/06

    Abstract: The invention relates to a method for producing trioxane from trioxymethy lene glycol dimethyl ether (POMD- MEn=3) by reacting trioxymethylene glycol dimethyl ether in the presence of an acidic catalyst and subsequently proces sing the reaction mixture by distillation. The method comprises the followin g steps: a) feeding trioxymethylene glycol dimethyl ether (POMDMEn=3) or a m ixture containing trioxymethylene glycol dimethyl ether to a reactor and rea cting the substance in the presence of an acidic catalyst to give a mixture (a) containing trioxane, formaldehyde, water, methylene glycol (MG), polyoxy methylene glycols (MGn>1), methanol, hemiformals (HF), methylal (POMDMEn= 1) and polyoxymethylene glycol dimethyl ether (POMDMEn>1); b) separating the reaction mixture (a) by distillation to give a low-boiling fraction (b1) containing trioxane, formaldehyde, water, methylene glycol, methanol, hemif ormal (HFn=1), methylal and dioxymethylene glycol dimethyl ether (POMDMEn=2) and a high-boiling fraction (b2) containing polyoxymethylene glycols (MGn&g t;1), hemiformals (HFn>1) and polyoxymethylene glycol dimethyl ether (POM DMEn>2); c) separating the low-boiling fraction (b1) by distillation to g ive a low-boiling fraction (c1) containing formaldehyde, water, methylene gl ycol, methanol, hemiformal (HFn=1), methylal and dioxymethylene glycol dimet hyl ether (POMDMEn=2) and a high-boiling fraction (c2) containing trioxane.

    3.
    发明专利
    未知

    公开(公告)号：DE502005002701D1

    公开(公告)日：2008-03-13

    申请号：DE502005002701

    申请日：2005-10-20

    Applicant: BASF AG

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

    IPC: C07D323/06

    Abstract: Processes are disclosed comprising: (a) reacting an aqueous formaldehyde solution in a reactor in the presence of a suitable catalyst to obtain a reaction product mixture comprising trioxane, formaldehyde and water; (b) distilling the reaction product mixture to form a top stream comprising crude trioxane; and (c) treating the top stream in one or more additional stages to form pure trioxane; wherein an aqueous sidestream is drawn off during the distilling of the reaction mixture.

    METHOD FOR THE PRODUCTION OF DIOXOLANE
    5.
    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.

    INTEGRATED PROCESS FOR PREPARING TRIOXANE FROM FORMALDEHYDE
    6.
    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).

    7.
    发明专利
    未知

    公开(公告)号：NO20062749L

    公开(公告)日：2006-07-12

    申请号：NO20062749

    申请日：2006-06-13

    Applicant: BASF AG

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

    IPC: B01D3/14 ,  B01D3/36 ,  C07D323/06

    Abstract: A process for removing trioxane from a mixture I of formaldehyde, trioxane and water, by a) distilling the mixture I in a first distillation stage at a pressure of from 0.1 to 2 bar to obtain a stream II which comprises formaldehyde and a stream III which comprises predominantly trioxane and additionally water and formaldehyde, b) mixing the stream III with a recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde to obtain a stream IIIa which comprises predominantly trioxane and additionally water and formaldehyde, c) distilling the stream IIIa, if appropriate after removing low boilers from the stream III or IIIa in a further distillation stage, in a second distillation stage at a pressure of from 0.2 to 10 bar, the pressure in the second distillation stage being at least 0.1 bar higher than the pressure in the first distillation stage, to obtain a stream IV of trioxane and a stream V which comprises predominantly trioxane and additionally water and formaldehyde, d) distilling the stream V in a third distillation stage at a pressure of from 0.1 to 4 bar to obtain a stream VI which comprises predominantly water and additionally formaldehyde, and the recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde, e) if appropriate, distilling the stream VI in a fourth distillation stage to obtain a stream VIII which comprises predominantly water, and a stream IX which comprises predominantly formaldehyde.

    10.
    发明专利
    未知

    公开(公告)号：DE10361517A1

    公开(公告)日：2005-07-28

    申请号：DE10361517

    申请日：2003-12-23

    Applicant: BASF AG

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

    IPC: B01J8/02 ,  B01J8/04 ,  B01J19/24 ,  C07C45/38 ,  F28D9/00 ,  C07C47/055

    Abstract: A process for preparing formaldehyde by gas-phase oxidation of methanol vapor by means of a gas stream comprising molecular oxygen in the presence of a fixed-bed catalyst comprising iron and molybdenum, wherein the process is carried out in a reactor ( 1 ) having heat-exchange plates ( 2 ) which are arranged in the longitudinal direction of the reactor ( 1 ) and have a spacing between them and through which a heat transfer medium flows, inlet and outlet facilities ( 3, 4 ) for the heat transfer medium to the heat-exchange plates ( 2 ) and also gaps ( 5 ) between heat-exchange plates ( 2 ) in which the fixed-bed catalyst is present and into which the methanol vapor and the gas stream comprising molecular oxygen are passed, is described.

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