CH187340A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

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Publication number
CH187340A
CH187340A CH187340DA CH187340A CH 187340 A CH187340 A CH 187340A CH 187340D A CH187340D A CH 187340DA CH 187340 A CH187340 A CH 187340A
Authority
CH
Switzerland
Prior art keywords
acid
dye
preparation
olive
fastness properties
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH187340A publication Critical patent/CH187340A/en

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  Verfahren zur Darstellung eines     o-Ozyazofarbstoffes.       Es wurde gefunden, dass durch Kuppeln  von     diazotierter        4-Nitro-2-amino-l-oxybenzol-          6-sulfonsäure    mit     2-Acetylamino-6-oxynaph-          thalin-8-sulfonsäure    ein Farbstoff erhalten  wird, der durch     Nachehromieren    der in sau  rem Bade entstehenden Färbungen gleich  mässige; olive Färbungen von ausgezeichneten  Echtheitseigenschaften liefert.

           Beispiel:       23,4 kg     4-Nitro-2-amino-l-oxybenzol-6-          sulfonsäure    werden wie üblich     diazotiert.     Die     Diazolösung    gibt man zu einer     soda-          alkalischen        Lösung    von 28,4 kg     2-Acetyl-          amino-6-oxynaphthalin-8-sulfonsäure.    Nach  beendeter Kupplung wird filtriert. Der Farb  stoff, ein schwarzes Pulver, löst sieh in  Wasser essigsauer violett,     sodaalkalisch    rot  und in konzentrierter Schwefelsäure blaurot.  Er färbt Wolle aus saurem Bade blaugrau.

      Die     nachchromierte    Färbung ist olive. Sie  besitzt sehr gute     Echtbeitseigenschaften.  



  Process for the preparation of an o-ozyazo dye. It has been found that by coupling diazotized 4-nitro-2-amino-1-oxybenzene-6-sulfonic acid with 2-acetylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which, by repeating the in acid rem The colorations produced by the bath are uniform; olive dyeings with excellent fastness properties.

           Example: 23.4 kg of 4-nitro-2-amino-1-oxybenzene-6-sulfonic acid are diazotized as usual. The diazo solution is added to a soda-alkaline solution of 28.4 kg of 2-acetylamino-6-oxynaphthalene-8-sulfonic acid. After the coupling has ended, it is filtered. The dye, a black powder, dissolves in water in acetic violet, soda-alkaline red and in concentrated sulfuric acid bluish red. He dyes wool from acid baths blue-gray.

      The chromed color is olive. It has very good real working properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, der durch Nachchromieren der in saurem Bade enstehenden Färbungen gleichmässige olive Färbungen von ausgezeich neten Echtheitseigenschaften liefert, dadurch gekennzeichnet, dass man 4-Nitro-2-diazo-l- oxybenzol6-sulfonsäure mit 2-Acetylamino- 6-oxynapbthalin-8-sulfonsäure kuppelt. PATENT CLAIM: A process for the preparation of an o-oxy azo dye which, by after-chroming the dyeings produced in an acid bath, provides uniform olive dyeings with excellent fastness properties, characterized in that 4-nitro-2-diazo-l-oxybenzenesulfonic acid is mixed with 2 -Acetylamino- 6-oxynapbthalene-8-sulfonic acid couples. Der neue Farbstoff stellt getrocknet ein schwarzes Pulver dar, das sich in verdünnter Essig säure violett, in. verdünnter Natriumkarbonat lösung rot und in konzentrierter Schwefel säure blaurot löst; er färbt Wolle aus saurem Bade blaugrau, beim Nachchromieren der Färbung erhält man ein Olive von ausge zeichneten Echtheitseigenschaften. When dried, the new dye is a black powder which dissolves violet in dilute acetic acid, red in dilute sodium carbonate solution and bluish red in concentrated sulfuric acid; it dyes wool from acidic baths blue-gray; when the dyeing is re-chromed, an olive with excellent fastness properties is obtained.
CH187340D 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye. CH187340A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187340X 1934-11-10
CH184880T 1935-08-24

Publications (1)

Publication Number Publication Date
CH187340A true CH187340A (en) 1936-10-31

Family

ID=25721099

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187340D CH187340A (en) 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH187340A (en)

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