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CH156017A - Process for the preparation of a blue dye of the diaminotriphenylmethane series. - Google Patents

Process for the preparation of a blue dye of the diaminotriphenylmethane series.

Info

Publication number
CH156017A
CH156017A CH156017DA CH156017A CH 156017 A CH156017 A CH 156017A CH 156017D A CH156017D A CH 156017DA CH 156017 A CH156017 A CH 156017A
Authority
CH
Switzerland
Prior art keywords
diaminotriphenylmethane
series
preparation
blue dye
dye
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 CH156017A publication Critical patent/CH156017A/en

Links

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
    • C09B11/12—Amino derivatives of triarylmethanes without any OH group bound to an aryl nucleus
    • C09B11/14—Preparation from aromatic aldehydes, aromatic carboxylic acids or derivatives thereof and aromatic amines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines blauen Farbstoffes der     Diaminotriphenylmethanreihe.       Im Hauptpatent wird ein blauer Farbstoff  beschrieben, der durch Kondensation von 1     Mol          Benzaldehyd-2.4-disulfosäure    mit 2     Mol    2.1'  Methylpropylamino-l-methylbenzol und Oxy  dation der entstandenen     Leukoverbindung     erhalten wird.  



  Einen analogen     Farbstoff    mit den gleichen  wertvollen Eigenschaften erhält man, wenn  man 1 Hol     Benzaldehyd-2.5-disulfosäure    mit  2     Mol        2-Mono-n-butylamino-l-methylbenzol     kondensiert und die     Leukoverbindüng    dann  oxydiert.  



  <I>Beispiel:</I>  26,6 Teile     Benzaldehyd-2.5-disulfosäure     werden in der üblichen Weise in verdünnter  Schwefelsäure mit 37 Teilen     2-Mono-n-butyl-          amino-l-methylbenzol    kondensiert. Die aus  fallende     Leukoverbindung    wird abgetrennt,  in Wasser unter Zusatz der berechneten  Menge Natronlauge gelöst und mit     Bichromat       und Salzsäure oxydiert. Nach dem     Aussalzen     erhält man einen Farbstoff, der Wolle und  Seide ebenso stark und in klarerer Nuance  anfärbt, wie die doppelte Menge des Farb  stoffes aus     Benzaldehyd-2.5-disulfosäure    und       2-Monoäthylamino-l-methylbenzol.  



  Process for the preparation of a blue dye of the diaminotriphenylmethane series. The main patent describes a blue dye which is obtained by condensation of 1 mole of benzaldehyde-2,4-disulfonic acid with 2 moles of 2.1 'methylpropylamino-1-methylbenzene and oxidation of the leuco compound formed.



  An analogous dye with the same valuable properties is obtained if 1 pint of benzaldehyde-2,5-disulfonic acid is condensed with 2 moles of 2-mono-n-butylamino-1-methylbenzene and the leuco compound is then oxidized.



  <I> Example: </I> 26.6 parts of benzaldehyde-2,5-disulfonic acid are condensed in the usual way in dilute sulfuric acid with 37 parts of 2-mono-n-butylamino-1-methylbenzene. The leuco compound which falls out is separated off, dissolved in water with the addition of the calculated amount of sodium hydroxide solution and oxidized with bichromate and hydrochloric acid. After salting out, a dye is obtained that dyes wool and silk just as strongly and in a clearer shade as double the amount of the dye from benzaldehyde-2,5-disulfonic acid and 2-monoethylamino-1-methylbenzene.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines blauen Farbstoffes der Diaminotriphenylmethanreihe. dadurch gekennzeichnet, dass man 1 Mol Benz- aldehyd-2.5-disulfosäure mit 2 Mol 2-Mono- n-butylamino-l-methylbenzol kondensiert und die Leukoverbindung oxydiert. Der Farbstoff färbt Wolle und Seide in sehr kräftigen und auch bei künstlichem Licht klaren, schönen, blauen Tönen an. PATENT CLAIM: Process for the preparation of a blue dye of the diaminotriphenylmethane series. characterized in that 1 mole of benzaldehyde-2,5-disulfonic acid is condensed with 2 moles of 2-mono-n-butylamino-1-methylbenzene and the leuco compound is oxidized. The dye stains wool and silk in very strong and beautiful blue tones that are also clear in artificial light.
CH156017D 1931-08-28 1931-08-28 Process for the preparation of a blue dye of the diaminotriphenylmethane series. CH156017A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH136390T 1931-08-28
CH156017T 1931-08-28

Publications (1)

Publication Number Publication Date
CH156017A true CH156017A (en) 1932-07-15

Family

ID=25712712

Family Applications (1)

Application Number Title Priority Date Filing Date
CH156017D CH156017A (en) 1931-08-28 1931-08-28 Process for the preparation of a blue dye of the diaminotriphenylmethane series.

Country Status (1)

Country Link
CH (1) CH156017A (en)

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