CH187331A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

Info

Publication number
CH187331A
CH187331A CH187331DA CH187331A CH 187331 A CH187331 A CH 187331A CH 187331D A CH187331D A CH 187331DA CH 187331 A CH187331 A CH 187331A
Authority
CH
Switzerland
Prior art keywords
dye
acid
preparation
purple
sulfonic acid
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 CH187331A publication Critical patent/CH187331A/en

Links

Description

  

  Verfahren zur Darstellung eines     o-Ogyazofarbstofes.       Es wurde gefunden, dass durch Kuppeln  von     diazotierter        4-Chlor-2-amino-l-oxyben-          zol-6-sulfonsäure    mit     2-Acetylamino-6-oxy-          naphthalin-8-sulfonsäure    ein Farbstoff erhal  ten wird, der durch     Nachchromieren    der in  saurem Bade entstehenden Färbungen gleich  mässige, blaue Färbungen von ausgezeichne  ten Echtheitseigenschaften liefert.  



  <I>Beispiel:</I>  22,4 kg     4-Chlor-2-amino-l-oxybenzol-6-          sulfonsäure    werden     diazotiert    und mit  28,4 kg     2-Acetylamino-6-oxynaphthalin-8-          sulfonsäure    in     sodaalkalischer    Lösung ver  einigt. Nach beendeter Kupplung     wird    der  Farbstoff     ausgesalzen    und     abfiltriert.    Er ist  ein dunkles Pulver und löst sich in verdünn  ter Essigsäure rot, in verdünnter     Natrium-          carbonatlösung    violett und in konzentrierter  Schwefelsäure violett. Er färbt Wolle aus  saurem Bade rotviolett.

   Die     nachchromierte       Färbung ist blau. Die Echtheitseigenschaf  ten sind sehr gut.



  Process for the preparation of an o-ogyazo dye. It has been found that by coupling diazotized 4-chloro-2-amino-1-oxyben- zene-6-sulfonic acid with 2-acetylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which can be obtained by chromating the The dyeings produced in an acid bath provide uniform, blue dyeings with excellent fastness properties.



  <I> Example: </I> 22.4 kg of 4-chloro-2-amino-1-oxybenzene-6-sulfonic acid are diazotized and mixed with 28.4 kg of 2-acetylamino-6-oxynaphthalene-8-sulfonic acid in a soda-alkaline solution united. When the coupling is complete, the dye is salted out and filtered off. It is a dark powder and dissolves red in dilute acetic acid, purple in dilute sodium carbonate solution and purple in concentrated sulfuric acid. He dyes wool from acid baths red-violet.

   The chromium-plated color is blue. The authenticity properties are very good.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, der durch Nachchromieren der in saurem Bade entstehenden Färbungen gleichmässige blaue Färbungen von ausge zeichneten Echtheitseigenschaften liefert, da durch gekennzeichnet, dass man 4-Chlor-2-di- a.zo-l-oxybenzol-6-sulfonsänre mit 2-Acetyl- amino-6-oxynaphthalin-8-sulfonsäure kup pelt. PATENT CLAIM: A process for the preparation of an o-oxy-azo dye which, by after-chroming the dyeings produced in an acidic bath, produces uniform blue dyeings with excellent fastness properties, as characterized in that 4-chloro-2-di- a.zo-l- oxybenzene-6-sulfonic acid coupled with 2-acetylamino-6-oxynaphthalene-8-sulfonic acid. Der neue Farbstoff stellt getrocknet ein dunkles Pulver dar, das sich in verdünnter Essigsäure rot, in verdünnter Natriumkar- bonatlösung violett und in konzentrierter Schwefelsäure violett löst; er färbt Wolle aus saurem Bade rotviolett, beim Nachchro- mieren der Färbung erhält man ein Blau von ausgezeichneten Echtheitseigenschaften. When dried, the new dye is a dark powder that dissolves red in dilute acetic acid, purple in dilute sodium carbonate solution, and purple in concentrated sulfuric acid; it dyes wool from an acid bath red-violet; when the dyeing is re-chromed, a blue with excellent fastness properties is obtained.
CH187331D 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye. CH187331A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187331X 1934-11-10
CH184880T 1935-08-24

Publications (1)

Publication Number Publication Date
CH187331A true CH187331A (en) 1936-10-31

Family

ID=25721090

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187331D CH187331A (en) 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH187331A (en)

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