CH187337A - 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
CH187337A
CH187337A CH187337DA CH187337A CH 187337 A CH187337 A CH 187337A CH 187337D A CH187337D A CH 187337DA CH 187337 A CH187337 A CH 187337A
Authority
CH
Switzerland
Prior art keywords
red
dye
preparation
olive
dyeings
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 CH187337A publication Critical patent/CH187337A/en

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Description

  

  Verfahren zur Darstellung eines     o-Oxyazofarbstoffes.       Es wurde gefunden, dass durch Kuppeln  von     diazotiertem        4-Nitro-2-amino-l-oxyben-          zol    mit     2-Acetylamino-6-oxynaphthalin-8-          sulfonsäure    ein Farbstoff erhalten wird, der  durch     Nachchromieren    der in saurem Bade  entstehenden Färbungen gleichmässige, olive  Färbungen von     ausgezeiehneten    Echtheits  eigenschaften     liefert.     



  <I>Beispiel:</I>  15,5 kg     4-Nitro-2-amino-l-oxybenzol    wer  den     diazotiert    und mit 28,4 kg     2-Acetyl-          amino-6-oxynaphthalin-8-sulfonsäure    in     soda-          alkalischer    Lösung gekuppelt. Nach beende  ter Kupplung wird der Farbstoff     ausgesalzen     und erbfiltriert. Er ist ein .dunkles Pulver  und löst sich in verdünnter Essigsäure rot,  in     verdünnter        Natriumcarbonatlösung    rot  violett und in konzentrierter Schwefelsäure  blaurot. Er färbt Wolle aus saurem Bade  violett. Die     nachchromierte    Färbung ist    olive.

   Die Echtheitseigenschaften sind sehr  gut.



  Process for the preparation of an o-oxyazo dye. It has been found that by coupling diazotized 4-nitro-2-amino-1-oxyben- zene with 2-acetylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which, by after-chromating the colorations produced in acidic baths, produces uniform, olive dyeings with excellent fastness properties.



  <I> Example: </I> 15.5 kg of 4-nitro-2-amino-1-oxybenzene are diazotized and mixed with 28.4 kg of 2-acetylamino-6-oxynaphthalene-8-sulfonic acid in alkaline soda Solution coupled. After the coupling has ended, the dye is salted out and filtered off. It is a dark powder and dissolves red in dilute acetic acid, red purple in dilute sodium carbonate solution and bluish red in concentrated sulfuric acid. He dyes wool from acid baths purple. The chromed color is olive.

   The fastness properties are very good.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, der durch Nachchromieren der in saurem Bade entstehenden Färbun gen gleichmässige olive Färbungen von aus gezeichneten Echtheitseigenschaften liefert, dadurch gekennzeichnet, dass man 4-Nitro- 2-diazo-l-oxybenzol mit 2-Acetylamino-6- oxynaphthalin-8-sulfonsäure kuppelt. PATENT CLAIM: Process for the preparation of an o-oxy-azo dye which, by re-chroming the dyeings in an acidic bath, provides uniform olive dyeings with excellent fastness properties, characterized in that 4-nitro-2-diazo-l-oxybenzene is mixed with 2- Acetylamino-6-oxynaphthalene-8-sulfonic acid couples. Der neue Farbstoff stellt getrocknet ein dunkles Pulver dar, das sich in verdünnter Essig säure rot, in verdünnter Natriumkarbonat- lösung rotviolett und in konzentrierter Schwefelsäure blaurot löst; er färbt Wolle aus saurem Bade violett, beim Nachchromie- ren der Färbung erhält man ein Olive von ausgezeichneten Echtheitseigenschaften. When dried, the new dye is a dark powder that dissolves red in dilute acetic acid, red-violet in dilute sodium carbonate solution and bluish-red in concentrated sulfuric acid; it dyes wool from an acidic bath violet; if the dyeing is re-chromed, an olive with excellent fastness properties is obtained.
CH187337D 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye. CH187337A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187337X 1934-11-10
CH184880T 1935-08-24

Publications (1)

Publication Number Publication Date
CH187337A true CH187337A (en) 1936-10-31

Family

ID=25721096

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187337D CH187337A (en) 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH187337A (en)

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