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Process for the production of a new azo dye.
CH211018A
Switzerland
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German - Inventor
Gesellschaft Fuer Chemis Basel
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Description
translated from German
Verfahren zur Herstellung eines neuen Azofarüstoffes. Es wurde gefunden, dass ein neuer Azo- farbstoff hergestellt werden kann, wenn man dia.zotiertes 1-Amino-2-methyl-4-nitro- benzol mit 2,3-Oxynaphthoesäure-3'-pyrenolid vereinigt.
Der neue Azofarbstoff bildet ein corinth- rotes, in Wasser unlösliches Pulver. Auf geeigneten Substraten, wie z. B. Baumwolle, hergestellt, färbt er diese in sehr echten, insbesondere auch lichtechten, corinthroten Tönen.
<I>Beispiel</I> 1.ä,9 Teile 1-Amino-2-methyl-4-nitro- benzol (1/1a 142o1) werden wie üblich diazo- tiert und in eine Lösung von 38,8 Teilen 2,3-Oxynaphthoesäure-3'-pyrenolid ('/1o Hol), <B>100</B> Teilen Natriumhydroxydlösung von 36 <I> </I> Be, <B>15</B> Teilen Natriumacetat und 2000 Teilen Wasser eingetragen. Der gebildete Farbstoff fällt sofort aus.
Er wird abfil- triert, mit Wasser gewaschen und getrocknet.
Process for the production of a new azo fuel. It has been found that a new azo dye can be produced by combining dia.zotierter 1-amino-2-methyl-4-nitro-benzene with 2,3-oxynaphthoic acid-3'-pyrenolide.
The new azo dye forms a corinth-red powder that is insoluble in water. On suitable substrates, such as. B. cotton, produced, he dyes them in very real, especially lightfast, corin-red tones.
<I> Example </I> 1.ä, 9 parts of 1-amino-2-methyl-4-nitrobenzene (1 / 1a 142o1) are diazotized as usual and in a solution of 38.8 parts of 3-oxynaphthoic acid-3'-pyrenolide ('/ 1o Hol), <B> 100 </B> parts of sodium hydroxide solution of 36 <I> </I> Be, <B> 15 </B> parts of sodium acetate and 2000 parts of water registered. The dye formed precipitates immediately.
It is filtered off, washed with water and dried.