CH187334A - 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
CH187334A
CH187334A CH187334DA CH187334A CH 187334 A CH187334 A CH 187334A CH 187334D A CH187334D A CH 187334DA CH 187334 A CH187334 A CH 187334A
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CH
Switzerland
Prior art keywords
acid
blue
dye
preparation
red
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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 CH187334A publication Critical patent/CH187334A/en

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  Verfahren zur Darstellung eines     o-Ogyazofarbstoffes.       Es wurde gefunden, dass durch Kuppeln  von     diazotiertem        5-Nitro-2-amino-l-oxyben-          zol    mit     2-(4'-bTethylphenyl)-sulfoylamino-6-          oxynaphthalin-8-sulfonsäure    ein Farbstoff  erhalten wird, der durch     Nachchromieren    der  in saurem Bade entstehenden Färbungen  gleichmässige,     grünstichig    graue Färbungen  von ausgezeichneten Echtheitseigenschaften  liefert.  



  <I>Beispiel:</I>  15,4 kg     5-Nitro-2-amino-l-oxybenzol    wer  den in üblicher Weise     diazotiert.    Die     Diazo-          lösung,    deren Mineralsäure mit     Natrium-          biearbonat    abgestumpft wird, fliesst.

   zu einer  Lösung von 39,5 kg     2-(4'-Methylphenyl)-          nlfoylamino-    6 -     oxynaphthalin-8-sulfonsäure     (hergestellt durch Behandeln von     2-Amino-6-          oxynal)Iitlialin-8-sulfonsäure    mit     4-llrethyl-          henzol-l-sulfonsäurechlorid    in saurer Lösung  nach bekanntem Verfahren) in 250 Liter  Wasser, 10 kg     Natriumbicarbonat    und  100 Liter     Pyridin.     



  Nach beendeter Kupplung wird filtriert.  Der Farbstoff, ein schwarzes Pulver, löst  sich in Wasser essigsauer blaurot, sodaalka-    lisch grünblau und in konzentrierter Schwe  felsäure blaurot. Er färbt Wolle aus saurem  Bade violett. Beim     Nachchromieren    der Fär  bung erhält man ein lichtechtes,     grünstichi-          aes    Grau.



  Process for the preparation of an o-ogyazo dye. It has been found that by coupling diazotized 5-nitro-2-amino-1-oxyben- zene with 2- (4'-bTethylphenyl) -sulfoylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which can be chromated by the The dyeings produced in an acid bath provide uniform, greenish gray dyeings with excellent fastness properties.



  <I> Example: </I> 15.4 kg of 5-nitro-2-amino-1-oxybenzene who are diazotized in the usual way. The diazo solution, whose mineral acid is blunted with sodium bicarbonate, flows.

   to a solution of 39.5 kg of 2- (4'-methylphenyl) -nlfoylamino-6-oxynaphthalene-8-sulfonic acid (prepared by treating 2-amino-6-oxynal) Iitlialin-8-sulfonic acid with 4-llrethyl-henzene -l-sulfonic acid chloride in acidic solution by a known method) in 250 liters of water, 10 kg of sodium bicarbonate and 100 liters of pyridine.



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

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, der durch Nachchromieren der in saurem Bade entstehenden Färbungen gleichmässige grünstichig graue Färbungen von ausgezeichneten Echtheitseigenschaften liefert, dadurch gekennzeichnet, dass man 5- Nitro-2-diazo-l-oxybenzol mit 2-(4'-Methyl phenyl)-sulfoylamino-6-oxynaphthalin.-8-sul- fonsäure kuppelt. PATENT CLAIM: Process for the preparation of an o-oxy-azo dye which, by after-chroming the dyeings produced in an acid bath, produces uniform greenish-gray dyeings with excellent fastness properties, characterized in that 5- nitro-2-diazo-l-oxybenzene is mixed with 2- ( 4'-methyl phenyl) sulfoylamino-6-oxynaphthalen-8-sulfonic acid couples. Der neue Farbstoff stellt getrocknet ein schwarzes Pulver dar, das sich in verdünnter Essigsäure blaurot, in ver dünnter Natriumkarbonatlösung grünblau und in konzentrierter Schwefelsäure blaurot löst; er färbt Wolle aus saurem Bade violett, beim Nachchromieren der Färbung erhält man ein grünstichiges Grau von ausgezeich neten Echtheitseigenschaften. When dried, the new dye is a black powder that dissolves blue-red in dilute acetic acid, green-blue in dilute sodium carbonate solution and blue-red in concentrated sulfuric acid; it dyes wool from acid baths violet; when the dyeing is re-chromed, a greenish gray with excellent fastness properties is obtained.
CH187334D 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye. CH187334A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187334X 1934-11-10
CH184880T 1935-08-24

Publications (1)

Publication Number Publication Date
CH187334A true CH187334A (en) 1936-10-31

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ID=25721093

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187334D CH187334A (en) 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH187334A (en)

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