CH186175A - Process for the preparation of an acidic dye of the Safranin series. - Google Patents

Process for the preparation of an acidic dye of the Safranin series.

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Publication number
CH186175A
CH186175A CH186175DA CH186175A CH 186175 A CH186175 A CH 186175A CH 186175D A CH186175D A CH 186175DA CH 186175 A CH186175 A CH 186175A
Authority
CH
Switzerland
Prior art keywords
series
preparation
safranin
acidic dye
acid
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie 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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH186175A publication Critical patent/CH186175A/en

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Description

  

  Verfahren zur Darstellung eines sauren Farbstoffes der     Safraninreihe.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Darstellung eines sauren       Farbstoffes    der     Safraninreihe.    Es ist dadurch  gekennzeichnet, dass man die     11-Methyldi-          äthylisorosindulin-l-sulfonsäure    mit     Bisulfit     in die entsprechende     1,6-Disulfonsäure    über  führt und diese mit     4-Aminobenzylanilin-2-          sulfonsäure    umsetzt.

      <I>Beispiel;</I>       1/io        Mol    der nach bekannten Verfahren  hergestellten     11-Methyldiäthylisorosindulin-          1-sulfonsäure    wird mit     Bisulfit    in die ent  sprechende     1,6-Disulfonsäure    übergeführt und  diese in wässeriger Lösung unter Zusatz von       Natriumacetat    mit     1/io        Mol        4-Aminobenzyl-          anilill-2-sulfonsäure    erwärmt.

   Der erhaltene       Farbstoff    der Formel:  
EMI0001.0022     
    löst sich in konzentrierter Schwefelsäure grün,  in Wasser klar blau, und er färbt Wolle in  klaren blauen Tönen. Die     Alkaliechtheit    ist    ganz erheblich besser als die des entspre  chenden     Farbstoffes    aus     4-Aminoäthylbenzyl-          aiiilin-2-sulfonsäure.  



  Process for the preparation of an acidic dye of the Safranin series. The subject of the present patent is a process for the preparation of an acidic dye of the Safranin series. It is characterized in that the 11-methyldiethylisorosindulin-1-sulfonic acid is converted with bisulfite into the corresponding 1,6-disulfonic acid and this is reacted with 4-aminobenzylaniline-2-sulfonic acid.

      <I> Example; </I> 1 / io mol of the 11-methyldiethylisorosindulin- 1-sulfonic acid prepared by known processes is converted with bisulfite into the corresponding 1,6-disulfonic acid and this in aqueous solution with the addition of sodium acetate with 1 / 10 mol of 4-aminobenzyl anilill-2-sulfonic acid heated.

   The obtained dye of the formula:
EMI0001.0022
    Dissolves green in concentrated sulfuric acid, clear blue in water, and dyes wool in clear blue tones. The alkali fastness is considerably better than that of the corresponding dye from 4-Aminoäthylbenzyl- aiiilin-2-sulfonic acid.

Claims (1)

PATENTANSPRMI Verfahren zur Darstellung eines sauren Farbstoffes der Safraninreihe, dadurch ge kennzeichnet, dass man die 11-Methyldiäthyl- isorosindulin-l-sulfousäure mit Bisulfit in die entsprechende 1,6-Disulfonsäure überführt und diese mit 4-Aminobenzylaciilin-2-sulfon- säure umsetzt. Der erhaltene Farbstoff löst sich in kon zentrierter Schwefelsäure grün, in Wasser klar blau, und er färbt Wolle in klaren blauen Tönen. PATENT APPLICATION Process for the preparation of an acidic dye of the safranine series, characterized in that the 11-methyldiethyl isorosindulin-l-sulfous acid is converted with bisulfite into the corresponding 1,6-disulfonic acid and this is reacted with 4-aminobenzylaciline-2-sulfonic acid . The dye obtained dissolves green in concentrated sulfuric acid, clear blue in water, and it dyes wool in clear blue tones.
CH186175D 1933-08-11 1934-01-12 Process for the preparation of an acidic dye of the Safranin series. CH186175A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE186175X 1933-08-11
CH174350T 1934-01-12

Publications (1)

Publication Number Publication Date
CH186175A true CH186175A (en) 1936-08-31

Family

ID=25719512

Family Applications (1)

Application Number Title Priority Date Filing Date
CH186175D CH186175A (en) 1933-08-11 1934-01-12 Process for the preparation of an acidic dye of the Safranin series.

Country Status (1)

Country Link
CH (1) CH186175A (en)

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