Purification of indigo
    3.
    发明授权
    Purification of indigo 失效
    靛蓝的净化

    公开(公告)号:US5116996A

    公开(公告)日:1992-05-26

    申请号:US731657

    申请日:1991-07-17

    IPC分类号: C07D209/36 C09B7/02

    CPC分类号: C09B7/02

    摘要: A process for purifying indigo comprises stripping the as-synthesized aqueous alkaline indoxylate solution before its oxidation to indigo of impurities in the absence of oxygen by distillation or by passing in steam or an inert gas and then treating the indigo precipitated on oxidation of the stripped indoxylate solution with dilute hydrogen peroxide solution.

    摘要翻译: 纯化靛蓝的方法包括在合成的碱性氢氧化异丁酸钠溶液在蒸发或通过蒸汽或惰性气体氧化之前将其氧化成不含氧的杂质的靛蓝,然后处理在汽提的吲哚氧化物氧化时沉淀的靛蓝 溶液用稀二氧化氢溶液。

    Preparation of halogenated indigo
    4.
    发明授权
    Preparation of halogenated indigo 失效
    卤化靛蓝的制备

    公开(公告)号:US5380871A

    公开(公告)日:1995-01-10

    申请号:US117075

    申请日:1993-09-14

    IPC分类号: C09B7/04 C07D405/04

    CPC分类号: C09B7/04

    摘要: A process for preparing halogenated indigo by reacting indigo with bromine and/or chlorine in the presence or absence of iodine as catalyst comprises using thionyl chloride as reaction medium.

    摘要翻译: PCT No.PCT / EP92 / 00612 Sec。 371日期:1993年9月14日 102(e)日期1993年9月14日PCT 1991年3月19日PCT公布。 第WO92 / 17547号公报 日本10月15日,1992年。在存在或不存在碘作为催化剂的情况下,通过靛蓝与溴和/或氯反应制备卤代靛蓝的方法包括使用亚硫酰氯作为反应介质。

    Purification of indigo
    7.
    发明授权
    Purification of indigo 失效
    靛蓝的净化

    公开(公告)号:US5116997A

    公开(公告)日:1992-05-26

    申请号:US684874

    申请日:1991-04-15

    摘要: A process for the purification of indigo comprises treating the indigo with sulfuric acid to give indigo sulfate, separating off and subsequently hydrolyzing the latter to re-form indigo, and then treating the dye with dilute hydrogen peroxide solution.

    摘要翻译: 纯化靛蓝的方法包括用硫酸处理靛蓝,得到硫酸靛蓝,分离出来,随后水解靛蓝以重新形成靛蓝,然后用稀的过氧化氢溶液处理染料。

    Preparation and purification of 1-amino-2-phenoxy-4-hydroxyanthraquinone
    8.
    发明授权
    Preparation and purification of 1-amino-2-phenoxy-4-hydroxyanthraquinone 失效
    1-氨基-2-苯氧基-4-羟基蒽醌的制备和纯化

    公开(公告)号:US5354876A

    公开(公告)日:1994-10-11

    申请号:US94988

    申请日:1993-07-22

    CPC分类号: C09B1/547

    摘要: Pure 1-amino-2-phenoxy-4-hydroxyanthraquinone is prepared by reacting 1-amino-2-halo-4-hydroxyanthraquinone with phenol in aqueous suspension at pH 9-13 and 130.degree.-160.degree. C., adjusting the reaction mixture pH to 9.5-11.5 after the reaction has ended, separating the reaction product from the liquid phase, and ,washing it with alkaline hypochlorite solution.

    摘要翻译: 通过1-氨基-2-卤代-4-羟基蒽醌与苯酚在pH 9-13和130-116℃的水性悬浮液中反应制备纯的1-氨基-2-苯氧基-4-羟基蒽醌,调节反应混合物 反应结束后pH至9.5-11.5,将反应产物与液相分离,并用碱性次氯酸盐溶液洗涤。