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Novartis AG
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Ciba Geigy AG
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Publication of ES234347A1publicationCriticalpatent/ES234347A1/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Process for the preparation of azo pigments, based on diazo compounds and azo compounds that are free of sulphonic acid groups, characterized in that the coupling is carried out in a practically anhydrous medium, with the addition of organic solvents in concentrated reaction composition, under intense mechanical mixing (Machine-translation by Google Translate, not legally binding)
ES0234347A1956-03-071957-03-06Procedure for the preparation of azoic pigments (Machine-translation by Google Translate, not legally binding)
ExpiredES234347A1
(en)
A procedure for the preparation of products of transformation of complex metal compounds in azocolorants (Machine-translation by Google Translate, not legally binding)