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    Process for producing trioxane and at least one comonomer
    32.
    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.

    36.
    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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