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AT48158B - Process for the preparation of disazo dyes particularly suitable for pigment color preparation. - Google Patents

Process for the preparation of disazo dyes particularly suitable for pigment color preparation.

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Publication number
AT48158B
AT48158B AT48158DA AT48158B AT 48158 B AT48158 B AT 48158B AT 48158D A AT48158D A AT 48158DA AT 48158 B AT48158 B AT 48158B
Authority
AT
Austria
Prior art keywords
preparation
particularly suitable
pigment color
disazo dyes
dyes particularly
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 AT48158B publication Critical patent/AT48158B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung besonders zur Pigmentfarbenbereitung geeigneter
Disazofarbstoffe. 
 EMI1.1 
 
 EMI1.2 
 
 EMI1.3 
   blonderem Werte, weil   er in sehr reine rötlichviolette Pigmentfarben übergeführt   werden kann.   



   Es wurde nun gefunden,   daü   man in diesem   Verfahren die -Naphtol-3   : 6-disulfosäure 
 EMI1.4 
 
Im folgenden sei das Verfahren naher erläutert :
15.6 Teile Dichlordianisidin werden mit 6.9 Teilen   Natriumnitrit   und der   nötigen     Menge Satzsaure   diazotiert und die eventuell tiltrierte Lösung in eine bis zum Schluss der 
 EMI1.5 
 (saures Natronsalz) einfliessen gelassen. Nach vollendung der Farbstoffl) ildung wird auf   in !)     erwärmt, der Farbstoff mit Salz gefällt, abfiltriert und getrocknet. Er liefert sehr rein@   violette Farblacke. 



   Mit der 1:3-Naphtolsäure selbst wird die Kombination in analoger Weise ausgeführt. 



   Der Farbstoff mit 2 Mol. 1-Xaphtol-3 : 6-disulfosäure liefert   bläulichrote   bis   bordennx   
 EMI1.6 




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  Method of representation particularly suitable for pigment color preparation
Disazo dyes.
 EMI1.1
 
 EMI1.2
 
 EMI1.3
   fairer values, because it can be converted into very pure reddish-purple pigment colors.



   It has now been found that -naphtol-3: 6-disulfonic acid is used in this process
 EMI1.4
 
The procedure is explained in more detail below:
15.6 parts of dichlorodianisidine are diazotized with 6.9 parts of sodium nitrite and the necessary amount of hydrochloric acid and the possibly filtered solution in a until the end of the
 EMI1.5
 (acid sodium salt) allowed to flow in. After completion of the formation of the dye, it is heated to in!), The dye is precipitated with salt, filtered off and dried. It delivers very pure @ violet colored lakes.



   The combination is carried out in an analogous manner with the 1: 3 naphtholic acid itself.



   The dye with 2 mol. 1-xaphtol-3: 6-disulfonic acid gives bluish-red to bordernx
 EMI1.6

Claims (1)

PATENT-ANSPRUCH: Verfahren zur Darstellung besonders zur Pigmentfarbenbereitung geeigneter Disazofarbstoffe, dadurch gekennzeichnet, dass man die Tetrazoverbindung aus Dichlordianisidin der Konstitution EMI2.1 an Stelle der in dem Verfahren des Stammpatentes Nr. 47156 benutzten 2-Naphtol- -3 : 6-disulfonsäure hier mit 2. Mol. 1 : 3-Naphtolsulfosäure bezw. ihren Derivaten kombiniert. PATENT CLAIM: Process for the preparation of disazo dyes particularly suitable for pigment color preparation, characterized in that the tetrazo compound is obtained from dichlorodianisidine of the constitution EMI2.1 instead of the 2-naphthol -3: 6-disulfonic acid used in the process of the parent patent no. 47156 here with 2. Mol. 1: 3-naphthol sulfonic acid respectively. combined with their derivatives.
AT48158D 1909-08-10 1910-04-23 Process for the preparation of disazo dyes particularly suitable for pigment color preparation. AT48158B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE47156X 1909-08-10
DE48158X 1910-03-14

Publications (1)

Publication Number Publication Date
AT48158B true AT48158B (en) 1911-05-26

Family

ID=25749046

Family Applications (1)

Application Number Title Priority Date Filing Date
AT48158D AT48158B (en) 1909-08-10 1910-04-23 Process for the preparation of disazo dyes particularly suitable for pigment color preparation.

Country Status (1)

Country Link
AT (1) AT48158B (en)

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