CH187344A - 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
CH187344A
CH187344A CH187344DA CH187344A CH 187344 A CH187344 A CH 187344A CH 187344D A CH187344D A CH 187344DA CH 187344 A CH187344 A CH 187344A
Authority
CH
Switzerland
Prior art keywords
blue
violet
dye
acid
preparation
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 CH187344A publication Critical patent/CH187344A/en

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Description

  

      Terfahren    zur Darstellung eines     o-Ogyazofarbstoffes.       Es wurde gefunden, dass durch Kuppeln  von     diazotiertem        4-Clilor-2-ainino-l-oxybenzol     mit     2-(4'-Methylphenyl)-sulfoylamino-6-oxy-          naphthalin-8-sulfoiisäureeinFarbstoff    erhalten  wird, der durch     Nachchromieren    der in saurem  Bade entstehenden Färbungen gleichmässige,  blauviolette Färbungen von ausgezeichneten  Echtheitseigenschaften liefert.  



  <I>Beispiel:</I>  14,4 kg     4-Chlor-2-amirro-l-oxybenzol    wer  den in üblicher Weise     diazotiert.    Die     Diazo-          lösung,    deren Mineralsäure mit Natrium  bikarbonat abgestumpft wird,     fliesst    zu einer  Lösung von 39,5 kg     2-(4'-Methylphenyl)

  -          sulfoylamino    - 6 -     oxynaphtbalin    - 8-     sulfonsäure     (hergestellt durch Behandeln von     2-Amino-          6-oxynaphtlialiri-8-sulfonsäure    mit     4-Methyl-          benzol-l-sulfonsäurechlorid    in saurer Lösung  nach bekanntem Verfahren) in 250 Liter  Wasser, 10 kg     Natriumbikarbonat    und 100  Liter     Pyridin.     



  Nach beendeter Kupplung wird filtriert.  Der Farbstoff, ein dunkelbraunes Pulver, löst  sich in Wasser essigsauer blaurot, soda-    alkalisch blau und in konzentrierter Schwe  felsäure violett. Er färbt Wolle aus saurem  Bade blaurot. Beim     Nachchromieren    der Fär  bung erhält man ein lichtechtes Blauviolett.



      Terfahren for the representation of an o-ogyazo dye. It has been found that by coupling diazotized 4-chloro-2-ainino-1-oxybenzene with 2- (4'-methylphenyl) -sulfoylamino-6-oxynaphthalene-8-sulfoic acid, a dye is obtained which can be obtained by after-chromating the in acidic The dyeings produced by the bath provide uniform, blue-violet dyeings with excellent fastness properties.



  <I> Example: </I> 14.4 kg of 4-chloro-2-amirro-1-oxybenzene who are diazotized in the usual way. The diazo solution, the mineral acid of which is truncated with sodium bicarbonate, flows into a solution of 39.5 kg of 2- (4'-methylphenyl)

  - sulfoylamino - 6 - oxynaphtbalin - 8- sulfonic acid (prepared by treating 2-amino-6-oxynaphtlialiri-8-sulfonic acid with 4-methylbenzene-1-sulfonic acid chloride in acidic solution according to a known process) in 250 liters of water, 10 kg Sodium bicarbonate and 100 liters of pyridine.



  After the coupling has ended, it is filtered. The dye, a dark brown powder, dissolves in water in acetic blue-red, soda-alkaline blue and in concentrated sulfuric acid violet. He dyes wool from acid baths blue-red. When the color is re-chromed, a lightfast blue-violet is obtained.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstofes, der durch Nachchromieren der in saurem Bade entstehenden Färbungen gleichmässige blauviolette Färbungen von ausgezeichneten Echtheitseigenschaften liefert, dadurch gekennzeichnet, dass man 4-Chlor- 2-diazo-l-oxybenzol mit 2-(4'-Methylphenyl)- sulfoylamino-6-oxynaphthalin-8-sulfonsäure kuppelt. PATENT CLAIM: Process for the preparation of an o-oxy-azo dye which, by after-chroming the dyeings in an acidic bath, produces uniform blue-violet dyeings with excellent fastness properties, characterized in that 4-chloro-2-diazo-1-oxybenzene is mixed with 2- (4 '-Methylphenyl) - sulfoylamino-6-oxynaphthalene-8-sulfonic acid couples. Der neue Farbstoff stellt getrocknet ein dunkelbraunes Pulver dar, das sich in verdünnter Essigsäure blaurot, in verdünnter Natriumkarbonatlösung blau und in konzen trierter Schwefelsäure violett löst; er färbt Wolle aus saurem Bade blaurot; beim Nach chromieren der Färbung erhält man ein Blau violett von ausgezeichneten Echtheitseigen schaften. The new dye is a dried dark brown powder that dissolves in dilute acetic acid blue-red, in dilute sodium carbonate solution blue and in concentrated sulfuric acid violet; he dyes wool from acid baths blue-red; after chroming the dyeing, a blue violet with excellent fastness properties is obtained.
CH187344D 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye. CH187344A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187344X 1934-11-10
CH184880T 1935-08-24

Publications (1)

Publication Number Publication Date
CH187344A true CH187344A (en) 1936-10-31

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ID=25721103

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187344D CH187344A (en) 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH187344A (en)

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