PROCESS FOR THE PRODUCTION OF MIXTURES OF 2-HYDROXYTETRAHYDROFURAN AND 4-HYDROXYBUTANAL
    21.
    发明授权
    PROCESS FOR THE PRODUCTION OF MIXTURES OF 2-HYDROXYTETRAHYDROFURAN AND 4-HYDROXYBUTANAL 无效
    工艺制备2-羟基四氢呋喃和4-羟混合工

    公开(公告)号:EP0586522B1

    公开(公告)日:1997-07-23

    申请号:EP92912218.2

    申请日:1992-05-14

    摘要: Disclosed is a process for the production of an equilibrium mixture of 2-hydroxytetrahydrofuran and 4-hydroxybutanal by a two-step process comprising (1) heating 2,5-dihydrofuran in the presence of a catalyst system comprising a phosphine, ruthenium or rhodium to convert the 2,5-dihydrofuran to 2,3-dihydrofuran; and (2) contacting 2,3-dihydrofuran with water in the presence of an acidic catalyst to convert the 2,3-dihydrofuran to a mixture of 2-hydroxytetrahydrofuran and 4-hydroxybutanal. Also disclosed is a process for the continuous production of an aqueous solution of 2-hydroxytetrahydrofuran and 4-hydroxybutanal. The mixture of 2-hydroxytetrahydrofuran and 4-hydroxybutanal may be catalytically hydrogenated to produce 1,4-butanediol.

    PROCESS FOR THE PREPARATION OF 3,4-DIHALO-1,2-EPOXYBUTANES
    27.
    发明授权
    PROCESS FOR THE PREPARATION OF 3,4-DIHALO-1,2-EPOXYBUTANES 失效
    用于生产3,4-二卤-1,2- EPOXYBUTANEN。

    公开(公告)号:EP0605508B1

    公开(公告)日:1995-12-06

    申请号:EP92919624.4

    申请日:1992-09-03

    IPC分类号: C07D303/08

    CPC分类号: C07D303/08

    摘要: Disclosed is a process for the preparation of 3,4-dichloro- and 3,4-dibromo-1,2-epoxybutane by the reaction of 3,4-epoxy-1-butane with chlorine or bromine in the presence of a quaternary ammonium or phosphonium halide compound. The reaction preferably is carried out by the addition of 3,4-epoxy-1-butane and chlorine or bromine to an organic, halogenation solvent containing chlorine or bromine and the quaternary compound.