AT69290B - Process for the preparation of yellow azo dyes. - Google Patents

Process for the preparation of yellow azo dyes.

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Publication number
AT69290B
AT69290B AT69290DA AT69290B AT 69290 B AT69290 B AT 69290B AT 69290D A AT69290D A AT 69290DA AT 69290 B AT69290 B AT 69290B
Authority
AT
Austria
Prior art keywords
preparation
azo dyes
yellow azo
parts
sulfonic acids
Prior art date
Application number
Other languages
German (de)
Original Assignee
Farbenfab Vorm Bayer F & Co
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 Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Application granted granted Critical
Publication of AT69290B publication Critical patent/AT69290B/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von gelben Azofarbstoffen. 



   Es wurde gefunden, dass man zu neuen, wertvollen gelben Azofarbstoffen dadurch gelangen kann, dass man die Diazoverbindungen der Toluidine oder ihrer Sulfosäuren mit Chlorarylmethylpyrazolonsulfosäuren kombiniert oder die genannten Diazoverbindungen mit   Azetessigestfr   kuppelt und die so erhältlichen Produkte mit Chlorarylhydrazinsulfosäuren kondensiert. 



   Die so erhältlichen Farbstoffe färben Wolle in grüngelben, egalen Tönen an. 



   Beispiel. 



   107 Teile p-Toluidin werden diazotiert und die Diazoverbindung mit 130 Teilen Azetessigester in Gegenwart von 110 Teilen Kalk gekuppelt. Die neue Verbindung wird abfiltriert und mit einer Kochsalzlösung, die freie Salzsäure enthält, gewaschen. Die abfiltrierte Masse wird darauf zu einer Suspension von 222'5 Teilen 2-Chlorphenylhydrazin-4-suIfosäure und 3500 Teilen Wasser, welches 35 Teile Soda und 116   Teile Natriumazetat enthält,   gegeben, die Mischung auf 950 3 Stunden erhitzt, angesäuert und der Farbstoff warm ausgesalzen. 



   Dasselbe Produkt entsteht durch Kuppeln der Diazoverbindung   des p-Toluidins   mit   2-Chlorphenylmethvlpyrazolonstilfosäure.   
 EMI1.1 
 

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



   <Desc / Clms Page number 1>
 



  Process for the preparation of yellow azo dyes.



   It has been found that new, valuable yellow azo dyes can be obtained by combining the diazo compounds of toluidines or their sulfonic acids with chloroarylmethylpyrazolone sulfonic acids or by coupling the diazo compounds mentioned with Acetessigestfr and condensing the products thus obtainable with chlorarylhydrazine sulfonic acids.



   The dyes obtainable in this way dye wool in green-yellow, level tones.



   Example.



   107 parts of p-toluidine are diazotized and the diazo compound is coupled with 130 parts of acetoacetic ester in the presence of 110 parts of lime. The new compound is filtered off and washed with a saline solution containing free hydrochloric acid. The filtered mass is then added to a suspension of 222.5 parts of 2-chlorophenylhydrazine-4-sulfonic acid and 3500 parts of water containing 35 parts of soda and 116 parts of sodium acetate, the mixture is heated to 950 for 3 hours, acidified and the dye is warm salted out.



   The same product is obtained by coupling the diazo compound of p-toluidine with 2-chlorophenyl methyrazolone stilfoic acid.
 EMI1.1
 

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

Claims (1)

verbindungen von Toluidinen oder ihren Sulfosäuren mit Chiorarylmethylpyrazolonsulfosäurpn kuppelt oder die Diazoverbindungen mit Azetessigester kuppelt und die so erhiiltlichen Verbindungen mit Chlorarylhydrazinsulfosäuren kondensiert. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. Coupling compounds of toluidines or their sulfonic acids with chlorarylmethylpyrazolone sulfonic acid or coupling the diazo compounds with acetoacetic ester and condensing the compounds thus obtained with chlorarylhydrazine sulfonic acids. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT69290D 1913-04-09 1913-12-01 Process for the preparation of yellow azo dyes. AT69290B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB69290X 1913-04-09

Publications (1)

Publication Number Publication Date
AT69290B true AT69290B (en) 1915-07-10

Family

ID=9823414

Family Applications (1)

Application Number Title Priority Date Filing Date
AT69290D AT69290B (en) 1913-04-09 1913-12-01 Process for the preparation of yellow azo dyes.

Country Status (1)

Country Link
AT (1) AT69290B (en)

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