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    PRODUCTION OF HYDROXYBENZALDEHIDE
    2.
    发明专利
    PRODUCTION OF HYDROXYBENZALDEHIDE 失效

    公开(公告)号：JPH01319452A

    公开(公告)日：1989-12-25

    申请号：JP11401689

    申请日：1989-05-06

    Applicant: BASF AG

    Inventor： UERUNERU SHIYUTETSUKU ,  HERUMUUTO REEMAA ,  HARARUTO RUSUTO ,  GERUHARUTO FURITSUTSU ,  HARUDOO JIIGERU

    IPC: B01J29/86 ,  B01J29/40 ,  B01J29/88 ,  C07B61/00 ,  C07C45/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/565 ,  C07C67/00

    Abstract: Hydroxybenzaldehydes of the formula (I) are prepared from a benzaldehyde of the formula (II) or its acetal, in which R1 in the R1O-phenyl ether group is an alkyl, cycloalkyl, alkylcycloalkyl or alkylaryl radical, R2 is H or OH or is identical to R1 and one or more R1O-phenyl ether groups are ortho, meta or para to the aldehyde function, by a process in which a benzaldehyde of the formula (II) or its acetal, in which R1 and R2 have the abovementioned meanings and one or more R1O-phenyl ether groups occupy the abovementioned position with respect to the aldehyde function, is converted into a hydroxybenzaldehyde of the formula (I) in the presence of water over a zeolite as a heterogeneous catalyst. The catalysts used are, in particular, zeolites of the pentasil type.

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