JPS5176328

A process for preparing aminoanthraquinones of high purity, which comprises catalytically hydrogenating nitroanthraquinones in the suspended state in an aqueous medium in the presence of a hydrogenating catalyst. In a preferred embodiment, the catalytic hydrogenation may be carried out in the presen...

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Main Authors SAMEJIMA MUNEYASU, YOSHIURA KOICHI, MYATA KATSUJI, MORI HIDETOSHI, HIRAI HIROSHI, MUKAI TAKESHI, OOSAWA TAGUI
Format Patent
LanguageEnglish
Published 01.07.1976
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Summary:A process for preparing aminoanthraquinones of high purity, which comprises catalytically hydrogenating nitroanthraquinones in the suspended state in an aqueous medium in the presence of a hydrogenating catalyst. In a preferred embodiment, the catalytic hydrogenation may be carried out in the presence of an organic or inorganic base, followed, if desired, by oxidizing the hydrogenation product.
Bibliography:Application Number: JP19740145615