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CH178546A - Process for the preparation of a dye of the triarylmethane series. - Google Patents

Process for the preparation of a dye of the triarylmethane series.

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Publication number
CH178546A
CH178546A CH178546DA CH178546A CH 178546 A CH178546 A CH 178546A CH 178546D A CH178546D A CH 178546DA CH 178546 A CH178546 A CH 178546A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
acid
triarylmethane series
series
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 CH178546A publication Critical patent/CH178546A/en

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Description

  

  Verfahren zur Herstellung eines     Farbstoffes    der     Triarylmethanreihe.       Es wurde gefunden, dass man zu einem  wertvollen Farbstoff der     Triar,ylmethanreihe     gelangt, wenn man     1.2-Xylyl-co-cu-disulfo-          säure,    wie sie durch Behandlung von     1.2-          Di-co-chlorinethylbenzol    mit     Natriumsulfit    er  hältlich ist, mit     Tetraäthyldiamidobenzliydrol     zur     Leukosäure        kondensiert    und diese dann  zum     Farbstoff    oxydiert,    <I>Beispiel:

  </I>    310     gr        1.2-Xylyl-am-m-disulfosäure    (dar  gestellt aus 1.     2-Di-m-chloruiethy        lberizol    mit       Natriumsulfit)    werden mit 326 Teilen Tetra  äthyldiarnidobenzhydrol gut gemischt und  unter Rühren in 2000 Teile konzentrierte  Schwefelsäure eingetragen. Man rührt die  Mischung bei 90  , bis eine Probe mit Na  triumacetat und Eisessig versetzt, keine       Hydrolreaktion    mehr zeigt. Die Schmelze  wird auf Eiswasser gegossen und die     Leuko-          säure    dann durch Zusatz von Natronlauge  gefällt.

   Die     Leukosäure    wird nun auf be-         kanntem    Wege mit     Bleisuperoxyd    oder Bi  chromat oxydiert. Aus der     Parbstofflösung     fällt Kochsalz den     Farbstoff    in golden schil  lernden Blättchen aus. Auf Wolle gefärbt,  erhält man eine sehr klare, gelbgrüne Fär  bung. Der Farbstoff besitzt neben einer für       Tripbenylmethanfarbstoffe    sehr     guter)    Licht  echtheit ein hervorragendes     Egalisierungs-          vermögen.     



  In     d.er        Carbinolform    entspricht der Farb  stoff folgender Formel:  
EMI0001.0032     




  Process for the preparation of a dye of the triarylmethane series. It has been found that a valuable dye of the triar, ylmethane series is obtained if 1,2-xylyl-co-cu-disulfonic acid, as obtainable by treating 1,2-di-co-chlorinethylbenzene with sodium sulfite, is added with tetraethyldiamidobenzliydrol condenses to leuco acid and then oxidizes it to the dye, <I> Example:

  </I> 310 gr 1.2-xylyl-am-m-disulfonic acid (is made from 1. 2-di-m-chloruiethy lberizol with sodium sulfite) are mixed well with 326 parts of tetra ethyldiarnidobenzhydrol and introduced into 2000 parts of concentrated sulfuric acid with stirring. The mixture is stirred at 90 ° until a sample with sodium acetate and glacial acetic acid no longer shows any hydrolic reaction. The melt is poured onto ice water and the leuco acid is then precipitated by adding sodium hydroxide solution.

   The leuco acid is now oxidized in a known way with lead peroxide or bi-chromate. From the paraffin solution, table salt precipitates the color in shimmering golden leaves. Dyed on wool gives a very clear, yellow-green dye. In addition to very good lightfastness for tripbenylmethane dyes, the dye has excellent leveling properties.



  In the carbinol form, the dye corresponds to the following formula:
EMI0001.0032


 

Claims (1)

PATENTANSPRÜCII: Verfahren zur Darstellung eines Farb stoffes der Triarylmethanreihe, dadurch ge kennzeichnet, dass man 1.2-gylyl-m-co-disulfo- säure, wie sie durch Behandlung von 1 . ?- Di-cv-chlormetlrylberrzol mit Natriumsulfit er hältlich ist, mit Tetraäthyldiamidobenzbydrol zur Leukosäure kondensiert und dann zum Farbstoff oxydiert. Der neue Farbstoff bildet golden schil lernde Blättchen und färbt Wolle in sehr klarer, gelbgrüner Färbung. PATENT APPLICATION II: Process for the preparation of a dye of the triarylmethane series, characterized in that 1.2-gylyl-m-co-disulfonic acid, as obtained by treating 1. ? - Di-cv-chlormetlrylberrzol with sodium sulfite it is available, condensed with tetraethyldiamidobenzbydrol to leuco acid and then oxidized to the dye. The new dye forms shimmering golden leaves and dyes wool in a very clear, yellow-green color. Der Farbstoff besitzt neben einer für Triphenylmethanfarb- stoffe sehr guten Lichtechtheit ein hervor ragendes Egalisierungsvermögen. In addition to very good lightfastness for triphenylmethane dyes, the dye has excellent leveling properties.
CH178546D 1933-11-11 1934-10-22 Process for the preparation of a dye of the triarylmethane series. CH178546A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE178546X 1933-11-11

Publications (1)

Publication Number Publication Date
CH178546A true CH178546A (en) 1935-07-31

Family

ID=5706153

Family Applications (1)

Application Number Title Priority Date Filing Date
CH178546D CH178546A (en) 1933-11-11 1934-10-22 Process for the preparation of a dye of the triarylmethane series.

Country Status (1)

Country Link
CH (1) CH178546A (en)

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