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 dinitrotoluenes
    7.
    发明授权
    Preparation of dinitrotoluenes 失效
    制备二硝基甲苯

    公开(公告)号:US4996376A

    公开(公告)日:1991-02-26

    申请号:US425930

    申请日:1989-10-24

    CPC分类号: C07C201/08

    摘要: Dinitrotoluenes are prepared by reacting mononitrotoluene(s) with nitric acid, in liquid phase, in the presence of an inorganic and acidic solid including at least one component selected from among orthophosphoric acid, pyrophosphoric acid, metaphosphoric acid, a metal dihydrogen phosphate, a metal hydrogen phosphate, a metal orthophosphate or a metal pyrophosphate, such metal cations having from 1 to 5 positive charges.

    摘要翻译: 二硝基甲苯通过在无机和酸性固体存在下在液相中与硝酸反应制备,所述无机酸性固体包括至少一种选自正磷酸,焦磷酸,偏磷酸,金属磷酸二氢盐,金属 磷酸氢盐,正磷酸金属或焦磷酸金属,具有1至5个正电荷的金属阳离子。

    Preparation of p-aminophenols
    8.
    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。