CH116995A - Process for the preparation of a basic dye of the malachite green series. - Google Patents

Process for the preparation of a basic dye of the malachite green series.

Info

Publication number
CH116995A
CH116995A CH116995DA CH116995A CH 116995 A CH116995 A CH 116995A CH 116995D A CH116995D A CH 116995DA CH 116995 A CH116995 A CH 116995A
Authority
CH
Switzerland
Prior art keywords
preparation
basic dye
malachite green
dye
green
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 CH116995A publication Critical patent/CH116995A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B11/00—Diaryl- or thriarylmethane dyes
    • C09B11/04—Diaryl- or thriarylmethane dyes derived from triarylmethanes, i.e. central C-atom is substituted by amino, cyano, alkyl
    • C09B11/10—Amino derivatives of triarylmethanes

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Darstellung eines basischen     Farbstoffes    der     Halachitgrünreihe.       Es wurde gefunden, dass man zu einem  neuen basischen Farbstoff der Malachitgrün  reihe gelangt, wenn man 1     Mol.    2. 3.     5-Tri-          chlorbenzaldehyd    mit 2     Mol.        Dimethylanilin     kondensiert und die so entstandene     Leuko-          base    oxydiert.  



  . Trocken ist der Farbstoff ein grünes Pul  ver, löslich in Wasser mit prachtvoll blauer  Farbe, und färbt Baumwolle, Seide und       Kunstseide    in egalen und reinen     blaugrünen     Tönen an. Bemerkenswert ist seine über  raschend grosse Affinität zur Kunstseide.  



  <I>Beispiel:</I>  10,5 kg 2. 3.     5-Trichlorbenzaldehyd    vom  Schmelzpunkt 75 bis 76   und 13,3 kg     Di-          methylanilin    werden mit 6 Liter Schwefel  säure 47       B6    30 Stunden bei 105 bis 110    gerührt. Nach dem     Übersättigen    mit Soda  lösung wird die überschüssige Base mit  Dampf     abgetrieben,    und die in der Kälte harte       Leukobase        abfiltriert    und getrocknet.

   Die er  haltene     Leukobase    wird in 200 Liter Wasser  mit 13,9 Liter Salzsäure 22'     B6    und 3 kg Eis  essig gelöst, und die kalte Lösung durch Zu  geben von 31 kg     Bleisuperoxydpaste    mit    49,4 %     Pb02    unter Rühren oxydiert. Nach  einer halben Stunde wird das Blei mit 7,8 kg  Natriumsulfat ausgefällt. Nach Erwärmen  auf<B>70'</B> und Zugabe von so viel heissem  Wasser, dass aller Farbstoff in Lösung geht,  wird abgesaugt,     und    aus dem Filtrat der  Farbstoff mit Kochsalz aasgesalzen, wobei er  in grünschillernden     Flittern    sich ausscheidet.  Er wird filtriert und getrocknet.



  Process for the preparation of a basic dye of the halachite green series. It has been found that a new basic dye of the malachite green series is obtained if 1 mole. 2. 3. 5-trichlorobenzaldehyde is condensed with 2 moles. Dimethylaniline and the leuco base thus formed is oxidized.



  . When dry, the dye is a green powder, soluble in water with a magnificent blue color, and stains cotton, silk and rayon in level and pure blue-green tones. Its surprisingly high affinity for artificial silk is remarkable.



  <I> Example: </I> 10.5 kg 2. 3. 5-trichlorobenzaldehyde with a melting point of 75 to 76 and 13.3 kg of dimethylaniline are stirred with 6 liters of sulfuric acid 47 B6 at 105 to 110 for 30 hours. After supersaturation with soda solution, the excess base is driven off with steam, and the leuco base, which is hard in the cold, is filtered off and dried.

   He obtained leuco base is dissolved in 200 liters of water with 13.9 liters of hydrochloric acid 22 'B6 and 3 kg of glacial acetic acid, and the cold solution is oxidized by adding 31 kg of lead peroxide paste with 49.4% Pb02 with stirring. After half an hour, the lead is precipitated with 7.8 kg of sodium sulfate. After heating to <B> 70 '</B> and adding enough hot water that all of the dye dissolves, it is suctioned off and the dye is carrion-salted from the filtrate with common salt, where it separates in green shimmering flakes. It is filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen basischen Farbstoffes der Malachitgrünreihe, dadurch gekennzeichnet, dass man 1 Mol. 2. 3.5-Trichlorbenzaldehyd mit 2 Mol. Di- methylanilin kondensiert und die so entstan dene Leukobase oxydiert. Trocken ist der Farbstoff ein grünes Pul ver, löslich in Wasser mit prachtvoll blauer Farbe, und färbt Baumwolle, Seide und Kunstseide in egalen und reinen blaugrünen Tönen an. Bemerkenswert ist seine über raschend grosse Affinität zur Kunstseide. PATENT CLAIM: Process for the preparation of a new basic dye of the malachite green series, characterized in that 1 mol. 2. 3,5-trichlorobenzaldehyde is condensed with 2 mol. Dimethylaniline and the leuco base thus formed is oxidized. When dry, the dye is a green powder, soluble in water with a magnificent blue color, and stains cotton, silk and rayon in level and pure blue-green tones. Its surprisingly high affinity for artificial silk is remarkable.
CH116995D 1925-09-03 1925-09-03 Process for the preparation of a basic dye of the malachite green series. CH116995A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH116995T 1925-09-03

Publications (1)

Publication Number Publication Date
CH116995A true CH116995A (en) 1926-10-01

Family

ID=4376008

Family Applications (1)

Application Number Title Priority Date Filing Date
CH116995D CH116995A (en) 1925-09-03 1925-09-03 Process for the preparation of a basic dye of the malachite green series.

Country Status (1)

Country Link
CH (1) CH116995A (en)

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