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US 2001/0029294 A1Published application
Preparation of azo colorants in microreactors
AssigneeClariant International Ltd.
InventorsUwe Nickel, Rudiger Jung, Klaus Saitmacher, Leonhard Unverdorben
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Abstract
Azo colorants are prepared by conducting the diazotization of aromatic or hetaromatic amines or the azo coupling reaction or the diazotization and the azo coupling reaction in a microreactor.
Claims17
A process for preparing azo colorants, which comprises conducting one or more of a) diazotization of aromatic or hetaromatic amines, b) azo coupling, c) laking and d) metal complexing in a microreactor.
Dependencies are inferred from the claim text.