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Hoechst AG
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Hoechst AG
Farbwerke Hoechst AG
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Application filed by Hoechst AG, Farbwerke Hoechst AGfiledCriticalHoechst AG
Publication of ES254612A1publicationCriticalpatent/ES254612A1/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Procedure for the preparation of monoazo chromium dyes, characterized by the fact that, in neutral or alkaline medium, the dyes are o, or'' -dihydroxy-azoic or o-hydroxy-o'' -carboxy-azoic, without groups sulphonic in the nucleus and containing, once or twice, one of the groups -SO2-CH2-CH2-OSO3H or -SO2-CH = CH2 with chromium complexes of aromatic o-hydroxy-carboxylic acids, in particular with chromium-salicylic acid or its salts. (Machine-translation by Google Translate, not legally binding)
ES0254612A1953-03-111959-12-29Procedure for preparing monoazoic colorants to chrome (Machine-translation by Google Translate, not legally binding)
ExpiredES254612A1
(en)
A procedure for the preparation of products of transformation of complex metal compounds in azocolorants (Machine-translation by Google Translate, not legally binding)