Preparation of polyhydroxybenzenes by direct hydroxylation of phenols
    6.
    发明授权
    Preparation of polyhydroxybenzenes by direct hydroxylation of phenols 失效
    通过苯酚的直接羟基化制备多羟基苯

    公开(公告)号:US4982013A

    公开(公告)日:1991-01-01

    申请号:US346215

    申请日:1989-05-02

    CPC分类号: C07C37/60

    摘要: Polyhydroxybenzenes, e.g., the dihydroxybenzenes, are prepared by directly hydroxylating a phenol with nitrous oxide, preferably in vapor phase, on a substrate of acidified zeolite particulates, advantageously ZSM-5 zeolite particulates, and such acidified zeolite particulates advantageously having a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 of greater than about 90, preferably up to 500.

    摘要翻译: 多羟基苯,例如二羟基苯,通过在酸化的沸石颗粒(优选ZSM-5沸石颗粒)的底物上直接用一氧化二氮直接羟基化苯酚,优选气相制备,并且这种酸化的沸石微粒有利地具有SiO 2 / Al 2 O 3大于约90,优选至多500。

    Preparation of p-aminophenols
    7.
    发明授权
    Preparation of p-aminophenols 失效
    对氨基苯酚的制备

    公开(公告)号:US5288906A

    公开(公告)日:1994-02-22

    申请号:US24440

    申请日:1993-03-01

    CPC分类号: C07C213/00

    摘要: Optionally substituted p-aminophenol compounds, easily converted into the N-acylated derivatives thereof, are prepared by hydrogenating the corresponding nitrobenzene, in solution in a saturated aliphatic monocarboxylic acid, notably acetic acid, in the presence of an effective amount of a protonic acid.

    摘要翻译: 通过在有效量的质子酸存在下,在饱和脂肪族单羧酸(特别是乙酸)的溶液中氢化相应的硝基苯来制备易于转化为N-酰化衍生物的任选取代的对氨基苯酚化合物。