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CH156015A - 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
CH156015A
CH156015A CH156015DA CH156015A CH 156015 A CH156015 A CH 156015A CH 156015D A CH156015D A CH 156015DA CH 156015 A CH156015 A CH 156015A
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 CH156015A publication Critical patent/CH156015A/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

  

  <B>Zusatzpatent</B> zum     Hauptpatent    Nr. 136390-    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-methylberrzol    und  Oxydation der entstandenen     Leukoverbin-          dung    erhalten wird.  



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



  <I>Beispiel:</I>  26,6 Teile     Benzaldehyd-2.5-disulfosäure     werden in der üblichen Weise in verdünnter  Schwefelsäure mit 32 Teilen     2-Mono-n-pro-          pylamino    -1-     nrethylbenzol    kondensiert. Die  entstandene Suspension der     Leukoverbindung     wird nach beendeter Kondensation alkalisch  gemacht, überschüssiges     2-Mono-n-propyl-          amino-l-methylbenzol    wird mit Dampf abge  trieben und die filtrierte Lösung wird in be-         kannter    Weise mit     Bichromat    bei Gegenwart  von     Oxalsäure    und Schwefelsäure oxydiert.

    Durch Aussahen erhält man eineu     Farbstoff,     der Wolle und Seide ebenso stark anfärbt,       wie        die        um        70%        grössere        Menge        des        ent-          sprechenden    Farbstoffes aus     Benzaldehyd-2.5-          disulfosäure    und     2-Monoäthylamino-l-methyl-          benzol    und zwar in wesentlich klarerer Nuance.



  <B> Additional patent </B> to main patent no. 136390- 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 mol of benzaldehyde-2,4-disulfonic acid with 2 mol of 2,1'-methylpropylamino-1-methylberrzene and oxidation of the leuco compound formed.



  An analogous dye with the same valuable properties is obtained if 1 mole of benzaldehyde-2,5-disulfonic acid is condensed with 2 moles of 2-mono-n-propylamino-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 32 parts of 2-mono-n-propylamino-1-nrethylbenzene. The resulting suspension of the leuco compound is made alkaline after the condensation has ended, excess 2-mono-n-propylamino-1-methylbenzene is driven off with steam and the filtered solution is oxidized in a known manner with bichromate in the presence of oxalic acid and sulfuric acid .

    Looking at it, you get a dye that dyes wool and silk just as strongly as the 70% larger amount of the corresponding dye made from benzaldehyde-2,5-disulfonic acid and 2-monoethylamino-1-methylbenzene, and in a much clearer shade.

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-propylamino-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. Claim: Process for the preparation of a blue dye of the diaminotriphenylmethane series, characterized in that 1 mol of benzaldehyde-2,5-disulfonic acid is condensed with 2 mol of 2-mono-n-propylamino-1-methylbenzene and the leuco compound is oxidized. The dye dyes wool and silk in a very strong and beautiful way, even in artificial light; blue tones.
CH156015D 1931-08-28 1931-08-28 Process for the preparation of a blue dye of the diaminotriphenylmethane series. CH156015A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH136390T 1931-08-28
CH156015T 1931-08-28

Publications (1)

Publication Number Publication Date
CH156015A true CH156015A (en) 1932-07-15

Family

ID=25712710

Family Applications (1)

Application Number Title Priority Date Filing Date
CH156015D CH156015A (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) CH156015A (en)

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