AT41815B - Process for the preparation of an insoluble monoazo dye. - Google Patents

Process for the preparation of an insoluble monoazo dye.

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Publication number
AT41815B
AT41815B AT41815DA AT41815B AT 41815 B AT41815 B AT 41815B AT 41815D A AT41815D A AT 41815DA AT 41815 B AT41815 B AT 41815B
Authority
AT
Austria
Prior art keywords
preparation
dye
monoazo dye
insoluble monoazo
dinitraniline
Prior art date
Application number
Other languages
German (de)
Original Assignee
Basf Ag
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 Basf Ag filed Critical Basf Ag
Application granted granted Critical
Publication of AT41815B publication Critical patent/AT41815B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Herstellung eines unlöslichen Monoazofarbstoffes. 



   Das 2. 6-Dinitranilin ist bisher zur Herstellung von Azofarbstoffen ohne Verwendung geblieben. 



   Es hat sich nun gezeigt, dass ein für die Lackfarbenfabrikation als Pigment ausserordentlich wertvoller Farbstoff entsteht, wenn man das 2. 6-Dinitranilin in die Diazoverbindung überführt und diese mit ss-Naphtol kombiniert. Der so erhaltene Farbstoff zeichnet sich durch seine Wasser-,   Sprit-und Ölunlöslichkeit   aus ; er sublimiert nicht, ist   kalkecht   und lichtbeständig. Vor dem isomeren Farbstoff aus 2. 4-Dinitranilin und ss-Naphtol unterscheidet er sich überraschenderweise durch seine ganz wesentlich blauere Nuance. Während der erstgenannte Farbstoff ein ausgesprochenes Orange darstellt, ist der neue Farbstoff ein lebhaftes Scharlachrot. 



   Die Kombination der   Diazoverbindung mit -Naphtol   kann in der   üblichen Weise bei   Gegenwart von mineralsäurebindenden Mitteln, wie Soda, Kalk, Acetat   etc..   ausgeführt werden. Diese Art der Kuppelung zeigt jedoch den Nachteil, dass leicht unsichere Resultate 
 EMI1.1 
 bei Abwesenheit von   minoratsäurobindondon Mitteln vor,   so   verläuft überraschenderweise   die Kombination glatt und unter Bildung eines ganz reinen Farbstoffes. 



   Beispiel. 



   18. 3 Teile 2. 6-Dinitranilin werden in üblicher Weise durch Eintragen in eine Lösung der berechneten Menge Nitrosylsulfat in konzentrierter   Schwefelsäure diazotiert   ; man lässt 
 EMI1.2 
 erhaltene Farbstoff ist leuchtend scharlachrot. 



   Die Kombination kann, wenn auch, wie gesagt, weniger vorteilhaft, bei Anwesenheit von Acetat etc. ausgeführt werden. Selbstverständlich kann die Herstellung des Farbstoffes auch bei Anwesenheit eine Substrats, ferner mit oder ohne Zugabe von   Türkischrotöl,   Seife oder ähnlich wirkenden Mitteln vorgenommen werden. 

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



   <Desc / Clms Page number 1>
 



  Process for the preparation of an insoluble monoazo dye.



   2. 6-Dinitraniline has so far not been used for the production of azo dyes.



   It has now been shown that a dye that is extremely valuable as a pigment for paint production is produced when the 2,6-dinitraniline is converted into the diazo compound and this is combined with ss-naphthol. The dye obtained in this way is distinguished by its insolubility in water, fuel and oil; it does not sublime, is lime-fast and lightfast. Surprisingly, it differs from the isomeric dye made from 2,4-dinitraniline and ß-naphtol in that it has a much bluer shade. While the first dye is a distinct orange, the new dye is a vivid scarlet red.



   The combination of the diazo compound with -naphtol can be carried out in the usual way in the presence of mineral acid-binding agents such as soda, lime, acetate, etc. However, this type of coupling shows the disadvantage that results are easily uncertain
 EMI1.1
 in the absence of minorate acid binding agents, surprisingly the combination proceeds smoothly and with the formation of a completely pure dye.



   Example.



   18. 3 parts of 2. 6-dinitraniline are diazotized in the usual way by adding the calculated amount of nitrosyl sulfate in concentrated sulfuric acid to a solution; one lets
 EMI1.2
 obtained dye is bright scarlet.



   The combination can be carried out in the presence of acetate etc., although, as said, less advantageously. Of course, the dye can also be produced in the presence of a substrate, furthermore with or without the addition of Turkish red oil, soap or similar agents.

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

 

Claims (1)

PATENT-ANSPRUCH : Vorfahren zur Herstellung eines unlöslichen Monoazofarbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung des 2. 6-Dinitranilins mit 13-Naphtol kombiniert. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of an insoluble monoazo dye, characterized in that the diazo compound of 2,6-dinitraniline is combined with 13-naphthol. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT41815D 1908-08-10 1909-01-07 Process for the preparation of an insoluble monoazo dye. AT41815B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE41815X 1908-08-10

Publications (1)

Publication Number Publication Date
AT41815B true AT41815B (en) 1910-04-11

Family

ID=5623877

Family Applications (1)

Application Number Title Priority Date Filing Date
AT41815D AT41815B (en) 1908-08-10 1909-01-07 Process for the preparation of an insoluble monoazo dye.

Country Status (1)

Country Link
AT (1) AT41815B (en)

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