AT69353B - Process for the preparation of a lightfast, red, leveling monoazo dye. - Google Patents

Process for the preparation of a lightfast, red, leveling monoazo dye.

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Publication number
AT69353B
AT69353B AT69353DA AT69353B AT 69353 B AT69353 B AT 69353B AT 69353D A AT69353D A AT 69353DA AT 69353 B AT69353 B AT 69353B
Authority
AT
Austria
Prior art keywords
leveling
lightfast
red
sulfonic acid
dye
Prior art date
Application number
Other languages
German (de)
Original Assignee
Hoechst Ag
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Filing date
Publication date
Application filed by Hoechst Ag filed Critical Hoechst Ag
Application granted granted Critical
Publication of AT69353B publication Critical patent/AT69353B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung eines lichtechten, roten, egalisierenden   Monoazofarb8to1fs.   



   Es wurde gefunden, dass ein roter, sehr gut egalisierender und sehr lichtechter   Woll-   farbstoff erhalten wird, wenn man die Diazoverbindung der 4-Azetylaminoanilin-2-sulfosäure in saurer Lösung auf die 2-Amino-8-oxynaphtalin-6-sulfosäure zur Einwirkung bringt. 



   Zu dem gleichen Farbstoff gelangt man, wenn man den Farbstoff der Formel : 
 EMI1.1 
 erhältlich, z. B. durch alkalische Reduktion des Farbstoffs   p-Nitranilin-o-sulfosäure--' ;'-Amino-     naphtolsulfosäure   (D. R. P. Nr. 95856) azetyliert. 



   Der so erhaltene Farbstoff zeichnet sich durch seine Nuance, durch sein sehr gutes Egalisierungsvermögen und durch ausgezeichnete Lichtechtheit aus. 



   Beispiele :
I. 23 kg 4-Azetylaminoanilin-2-sulfosäure werden in 200 l Wasser mit 12 matron- 
 EMI1.2 
 mit 7 kg Natriumnitrit in   50 l   Wasser diazotiert. Nach ·-stündigem Rühren lasst man in den Brei der Diazoverbindung eine Lösung von   2G'3 Y-Aminonaphtolsulfosäure in 200l   Wasser und 12 Natronlange 40  Bé einlaufen. Nach kurzer Zeit lässt man hiezu eine Lösung von 25 kg kristallisiertem Natriumazetat in etwa 180 l Wasser langsam zulaufen. Nach 
 EMI1.3 
 ausgesalzen. Der Farbstoff scheidet sich in Form bronzefarbener Kristalle ab. Ex wird nach dem Erkalten abgepresst und   getrocknet.   



    PATENT-ANSPRÜCHE:  
I. Verfahren zur Darsellung eines lichtechten, roten, egalisierenden Monoazofarbstoffs, darin bestehend, dass man die Diazoverbindung der 4-Azetylaminoanilin-2-sulfosäure in saurer Lösung auf die 2-Amino-8-oxynaphtalin-6-sulforsäure zur Einwirkung bringt. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the representation of a lightfast, red, leveling monoazo color to1fs



   It has been found that a red, very good leveling and very lightfast wool dye is obtained if the diazo compound of 4-acetylaminoaniline-2-sulfonic acid is used in acidic solution on 2-amino-8-oxynaphthalene-6-sulfonic acid brings.



   The same dye can be obtained by using the dye of the formula:
 EMI1.1
 available, e.g. B. acetylated by alkaline reduction of the dye p-nitroaniline-o-sulfonic acid - ';' - amino naphthol sulfonic acid (D. R. P. No. 95856).



   The dye obtained in this way is distinguished by its nuance, by its very good leveling capacity and by excellent lightfastness.



   Examples:
I. 23 kg of 4-acetylaminoaniline-2-sulfonic acid are dissolved in 200 l of water with 12 matron
 EMI1.2
 diazotized with 7 kg of sodium nitrite in 50 l of water. After stirring for one hour, a solution of 2G'3 Y-aminonaphthol sulfonic acid in 200 liters of water and 12 40 Bé soda is allowed to run into the paste of the diazo compound. After a short time, a solution of 25 kg of crystallized sodium acetate in about 180 l of water is slowly run in for this purpose. After
 EMI1.3
 salted out. The dye separates out in the form of bronze-colored crystals. After cooling down, Ex is pressed and dried.



    PATENT CLAIMS:
I. A process for the presentation of a lightfast, red, leveling monoazo dye, which consists in bringing the diazo compound of 4-acetylaminoaniline-2-sulfonic acid in acidic solution to the action of 2-amino-8-oxynaphthalene-6-sulfonic acid.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

2. Abänderung des Verfahrens nach Anspruch 1. darin bestehend, dass man anstatt die diazotierte Azetylverbindung der 4-Aminoandin-2-sulfosäure mit der 2-Amino-8-oxnaphtalin-6-sulfosäure zu kombinieren, den Mononzofarbstoff der Formel: EMI1.4 nachträglich azetyliert. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. 2. Modification of the method according to claim 1, consisting in that instead of combining the diazotized acetyl compound of 4-aminoandine-2-sulfonic acid with 2-amino-8-oxnaphthalene-6-sulfonic acid, the mononzo dye of the formula: EMI1.4 subsequently acetylated. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT69353D 1913-09-01 1914-02-04 Process for the preparation of a lightfast, red, leveling monoazo dye. AT69353B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE69353X 1913-09-01

Publications (1)

Publication Number Publication Date
AT69353B true AT69353B (en) 1915-07-10

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ID=5634927

Family Applications (1)

Application Number Title Priority Date Filing Date
AT69353D AT69353B (en) 1913-09-01 1914-02-04 Process for the preparation of a lightfast, red, leveling monoazo dye.

Country Status (1)

Country Link
AT (1) AT69353B (en)

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