AT48689B - Process for the preparation of a water- and oil-insoluble disazo dye. - Google Patents

Process for the preparation of a water- and oil-insoluble disazo dye.

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Publication number
AT48689B
AT48689B AT48689DA AT48689B AT 48689 B AT48689 B AT 48689B AT 48689D A AT48689D A AT 48689DA AT 48689 B AT48689 B AT 48689B
Authority
AT
Austria
Prior art keywords
water
oil
preparation
disazo dye
insoluble disazo
Prior art date
Application number
Other languages
German (de)
Original Assignee
Griesheim Elektron Chem Fab
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 Griesheim Elektron Chem Fab filed Critical Griesheim Elektron Chem Fab
Application granted granted Critical
Publication of AT48689B publication Critical patent/AT48689B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung eines wasser- und ölunlöslichen Disazofarbstoffes. 



   Lässt man auf die Diazethylverbindung des m-m'-Dichlorbenzidin (NH2 : Cl = 1 : 3) die zwei Molekülen entsprechende Menge Salpetersäure einwirken, so erhält man nach der   Verseifung des Reaktionsproduktes ein Dichlordinitrobenzidin, welchem wahrscheinlich die   Konstitution : 
 EMI1.1 
 zukommt. 



   Es wurde nun gefunden, dass die Tetrazoverbindung dieses   Dichtordinitrobenzidin   bei der Kombination mit 2 Molekülen ss-Naphtol einen roten Disazofarbstoff liefert, welcher wegen seiner Wasserunlöslichkeit und hervorragenden   Olechtheit   der Darstellung von 
 EMI1.2 
 hervorragend ölechten Disazofarbstoff liefern würde. 



   Darstellung des Dichlordinitrobenzidin : m-m'-Dichlorbenzidin wird in üblicher Weise in die Diazethylverbindung übergeführt, 
 EMI1.3 
   ungefähr 2550 C.   



   Darstellung dos Farbstoffes :   34 3 Tei) o Dichlordinitrobenzidin werden   mit 200 Teilen Wasser und HO Teilen 
 EMI1.4 
 

 <Desc/Clms Page number 2> 

   140 Teile Natriumazetat zugefügt waren, einfliessen. Der Farbstoff bildet'sich rasch und scheidet sich in roten Flocken airs. Er wird abfiltriort, mit Wasser gewaschen und vorteil-   haft in Pastenform verwendet. 
 EMI2.1 
 oder   Harxteim,   zugesetzt worden oder es kann die Kombination bei Abwesenheit eines dieser Stoffe ausgeführt werden. Selbstvorständlich kann man die Kupplung der   Tetr8O-   verbindung mit   -Naphtol   auch bei Gegenwart eines Substrates vornehmen.



   <Desc / Clms Page number 1>
 



  Process for the preparation of a water- and oil-insoluble disazo dye.



   If the diazethyl compound of m-m'-dichlorobenzidine (NH2: Cl = 1: 3) is allowed to act in the amount of nitric acid corresponding to two molecules, a dichlorodonitrobenzidine is obtained after saponification of the reaction product, which probably has the constitution:
 EMI1.1
 comes to.



   It has now been found that the tetrazo compound of this dense-ordinitrobenzidine, when combined with 2 molecules of ss-naphtol, produces a red disazo dye which, because of its insolubility in water and excellent weakness of the representation of
 EMI1.2
 would provide excellent oleic disazo dye.



   Preparation of the dichloroditrobenzidine: m-m'-dichlorobenzidine is converted into the diazethyl compound in the usual way,
 EMI1.3
   about 2550 C.



   Presentation of the dye: 34 3 parts dichlorodinitrobenzidine are mixed with 200 parts of water and HO parts
 EMI1.4
 

 <Desc / Clms Page number 2>

   140 parts of sodium acetate were added, flow in. The dye forms rapidly and separates in red flakes. It is filtered off, washed with water and advantageously used in paste form.
 EMI2.1
 or Harxteim, has been added, or the combination can be carried out in the absence of one of these substances. Of course, the coupling of the Tetr8O compound with -naphtol can also be carried out in the presence of a substrate.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung eines wasser- und ölunlöslichen Disazofarbstoffes, dadurch gekennzeichnet, dass man die Tetrazovorbindung des Dichlordinitrobenzidins, welches durch Dinitrieren von m-m'-Dichlordiazetylbenzidin und folgende Verseifung erhalten werden kann, mit 2 Molekülen [3-Naphtol kombiniert, in Gegenwart oder Abwesenheit eines Substrates, mit oder ohne Zusatz von Türkischrotöl oder ähnlich wirkenden Mitteln. PATENT CLAIM: Process for the preparation of a water- and oil-insoluble disazo dye, characterized in that the tetrazo pre-bond of dichlorodinitrobenzidine, which can be obtained by dinitrating m-m'-dichlorodiacetylbenzidine and subsequent saponification, is combined with 2 molecules [3-naphthol, in the presence or absence a substrate, with or without the addition of Turkish red oil or similar agents.
AT48689D 1910-02-10 1910-07-04 Process for the preparation of a water- and oil-insoluble disazo dye. AT48689B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE48689X 1910-02-10

Publications (1)

Publication Number Publication Date
AT48689B true AT48689B (en) 1911-06-26

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ID=5626070

Family Applications (1)

Application Number Title Priority Date Filing Date
AT48689D AT48689B (en) 1910-02-10 1910-07-04 Process for the preparation of a water- and oil-insoluble disazo dye.

Country Status (1)

Country Link
AT (1) AT48689B (en)

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