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    INTEGRATED METHOD FOR THE PRODUCTION OF TRIOXANE FROM FORMALDEHYDE
    3.
    发明专利
    INTEGRATED METHOD FOR THE PRODUCTION OF TRIOXANE FROM FORMALDEHYDE 未知

    公开(公告)号：CA2623573A1

    公开(公告)日：2007-02-15

    申请号：CA2623573

    申请日：2006-08-01

    Applicant: BASF AG

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

    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.

    5.
    发明专利
    未知

    公开(公告)号：DE102004051118A1

    公开(公告)日：2006-04-27

    申请号：DE102004051118

    申请日：2004-10-20

    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.

    6.
    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.

    INTEGRATED PROCESS FOR PREPARING TRIOXANE FROM FORMALDEHYDE
    7.
    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).

    8.
    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.

    METHOD FOR SEPARATING TRIOXANE FROM A MIXTURE CONTAINING TRIOXANE, FORMALDEHYDE AND WATER
    9.
    发明专利
    METHOD FOR SEPARATING TRIOXANE FROM A MIXTURE CONTAINING TRIOXANE, FORMALDEHYDE AND WATER 未知

    公开(公告)号：CA2548640A1

    公开(公告)日：2005-07-14

    申请号：CA2548640

    申请日：2004-12-21

    Applicant: BASF AG

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

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

    Abstract: The invention relates to a method for separating trioxane from a mixture containing formaldehyde, trioxane and water. According to said method: the mixture (1) is distilled in a first distillation stage (7) at a pressure of between 0.1 and 2 bar to obtain a stream (8) containing formaldehyde and a stream (9) containing predominantly trioxane, in addition to water and formaldehyde; the stream (9) is mixed with a recycling stream (19) containin g predominantly trioxane, in addition to water and formaldehyde to form a stre am (10) containing predominantly trioxane, in addition to water and formaldehyd e; the stream (10) is then distilled in a second distillation stage (14) at a pressure of between 0.2 and 10 bar, optionally after the separation of low- boilers from the stream (9) or (10) in an additional distillation stage (11) . The pressure in the second distillation stage (14) is at least 0.1 bar highe r than the pressure in the first distillation stage (7). Said distillation produces a stream (15) consisting of trioxane and a stream (16) containing predominantly trioxane, in addition to water and formaldehyde. The stream (1 6) is then distilled in a third distillation stage (17) at a pressure of betwee n 0.1 and 4 bar, to obtain a stream (18) containing predominantly water, in addition to formaldehyde and the recycling stream (19) containing predominantly trioxane, in addition to water and formaldehyde. The resultant stream (18) is optionally distilled in a fourth distillation stage (20), to obtain a stream (21) containing predominantly water and a stream (22) containing predominantly formaldehyde.

    10.
    发明专利
    未知

    公开(公告)号：AT384710T

    公开(公告)日：2008-02-15

    申请号：AT05798084

    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.

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