CH187343A - 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
CH187343A
CH187343A CH187343DA CH187343A CH 187343 A CH187343 A CH 187343A CH 187343D A CH187343D A CH 187343DA CH 187343 A CH187343 A CH 187343A
Authority
CH
Switzerland
Prior art keywords
acid
dye
blue
preparation
purple
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 CH187343A publication Critical patent/CH187343A/en

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Description

  

  Verfahren zur Darstellung     eines        o-Oxyazofarbstoffes.       Es wurde gefunden, dass durch Kuppeln  von     diazotierter        4-Chlor-2-amino-l-oxybenzol-          6-sulfonsäure    mit     2-Benzoylamino-6-oxynaph-          thalin-8-sulfonsäure    ein Farbstoff erhalten  wird, der durch     Nachchromieren    der in saurem  Bade entstehenden Färbungen gleichmässige,  blaue Färbungen von ausgezeichneten Echt  heitseigenschaften liefert.  



  <I>Beispiel:</I>  22,4 kg     4-Chlor-2-amino-l-oxybenzol-6-          sulfonsäure    werden nach üblichem Verfahren       diazotiert.    Die     Diazolösung    fliesst zu einer  Lösung von 34,3 kg     2-Berrzoylamino-6-oxy-          naphtlralirr-8-sulfonsäur-e    in 200 Liter Wasser  und 14 kg Natriumkarbonat. Nach beendeter  Kupplung wird der     ausgeschiedene    Farbstoff       abfiltriert        und    getrocknet. Er bildet ein  blaues Pulver, löst sich in Wasser essig  sauer blaurot,     sodaalkalisch    violett und in  konzentrierter Schwefelsäure violett. Er färbt  Wolle aus saurem Bade rot.

   Beim Nach-         chromieren    der Färbung wird ein lichtechtes  Blau erhalten.



  Process for the preparation of an o-oxyazo dye. It has been found that by coupling diazotized 4-chloro-2-amino-1-oxybenzene-6-sulfonic acid with 2-benzoylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which can be chromated in an acidic bath resulting colorations uniform, blue colorations with excellent fastness properties.



  <I> Example: </I> 22.4 kg of 4-chloro-2-amino-1-oxybenzene-6-sulfonic acid are diazotized according to the usual method. The diazo solution flows into a solution of 34.3 kg of 2-benzoylamino-6-oxynaphthalene-8-sulfonic acid in 200 liters of water and 14 kg of sodium carbonate. After the coupling has ended, the precipitated dye is filtered off and dried. It forms a blue powder, dissolves in water, acidic blue-red, soda-alkaline violet and in concentrated sulfuric acid violet. He dyes wool from acid baths red.

   A lightfast blue is obtained when the color is re-chromed.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, der durch Nacbchromieren der in saurem Bade entstehenden Färbungen gleichmässige blaue Färbungen von ausge zeichneten Echtheitseigenschaften liefert, da durch gekennzeichnet, dass man 4-Chlor-2- diazo-l-oxybenzol-6-sulfansäure mit 2-Berrzoyl- amino-6-oxynaphthalin-8-sulfonsäure kuppelt. PATENT CLAIM: Process for the preparation of an o-oxy-azo dye which, by chromating the dyeings produced in an acid bath, provides uniform blue dyeings with excellent fastness properties, as characterized in that 4-chloro-2-diazo-l-oxybenzene-6- sulfanic acid with 2-berzoylamino-6-oxynaphthalene-8-sulfonic acid. Der neue Farbstoff stellt getrocknet ein blaues Pulver dar, das sich in verdünnter Essigsäure blaurot, in verdünnter Natrium karbonatlösung violett und in konzentrierter Schwefelsäure violett löst; er färbt Wolle aus saurem Bade rot; beim Nachchromieren der Färbung erhält man ein Blau von aus gezeichneten Echtheitseigenschaften. When dried, the new dye is a blue powder that dissolves in dilute acetic acid in bluish red, in dilute sodium carbonate solution in purple and in concentrated sulfuric acid in purple; he dyes wool red from acid bath; when the dyeing is re-chromed, a blue with excellent fastness properties is obtained.
CH187343D 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye. CH187343A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187343X 1934-11-10
CH184880T 1935-08-24

Publications (1)

Publication Number Publication Date
CH187343A true CH187343A (en) 1936-10-31

Family

ID=25721102

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187343D CH187343A (en) 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH187343A (en)

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