CH210508A - Process for the preparation of a chromable dye of the triarylmethane series. - Google Patents

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

Info

Publication number
CH210508A
CH210508A CH210508DA CH210508A CH 210508 A CH210508 A CH 210508A CH 210508D A CH210508D A CH 210508DA CH 210508 A CH210508 A CH 210508A
Authority
CH
Switzerland
Prior art keywords
dye
chromable
preparation
triarylmethane series
mol
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 CH210508A publication Critical patent/CH210508A/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
    • C09B11/06—Hydroxy derivatives of triarylmethanes in which at least one OH group is bound to an aryl nucleus and their ethers or esters
    • C09B11/08—Phthaleins; Phenolphthaleins; Fluorescein

Landscapes

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

Description

  

  Verfahren zur Herstellung eines     chromierbaren        Farbstoffes    der     Triarylmethanreihe.       Gegenstand des vorliegenden Zusatz  patentes     ist    ein Verfahren zur     Herstellung     eines     ehromierbaren    Farbstoffes der     Triaryl-          methanreihe,    welches dadurch gekennzeich  net ist, dass man 1     Mol        5-Ogytrimellitsäure-          anhydrid        mit    2     Mol        Pyrogallol    kondensiert.

      <I>Beispiel:</I>  25 Gewichtsteile     Pyrogallol,    21 Gewichts  teile     5-Ogytrimellitsäureanhydrid    werden bei  190-200   C unter     Luftabschluss    3-4 Stun  den verschmolzen. Die pulverisierte Schmelze       wird    aus     wässrigem    Alkohol umkristallisiert.  



  Der so erhaltene Farbstoff hat vermutlich  folgende     Konstitution:     
EMI0001.0021     
    Es kann auch ein     Isomeres    vorliegen, in dem  die Stellung der     ortho-ständigen        Hydrogyl-          oder        Carbogylgruppe    vertauscht ist. Der  Farbstoff färbt Wolle aus saurem Bade in    roten Tönen, die beim     Nachchromieren        violett     werden und ausgezeichnete Echtheitseigen  schaften besitzen.



  Process for the preparation of a chromable dye of the triarylmethane series. The subject of the present additional patent is a process for the production of an honorable dye of the triaryl methane series, which is characterized in that 1 mol of 5-ogytrimellitic anhydride is condensed with 2 mol of pyrogallol.

      <I> Example: </I> 25 parts by weight of pyrogallol and 21 parts by weight of 5-ogytrimellitic anhydride are fused for 3-4 hours at 190-200 C in the absence of air. The pulverized melt is recrystallized from aqueous alcohol.



  The dye thus obtained presumably has the following constitution:
EMI0001.0021
    It is also possible for an isomer to be present in which the position of the ortho-position hydrogyl or carbogyl group is reversed. The dye dyes wool from acid baths in red tones, which turn purple when they are chromed and have excellent fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines chromier- baren Farbstoffes der Triarylmethanreihe, dadurch gekennzeichnet, dass man 1 Mol. 5- Oxytrimellitsäureanhydrid mit \? Mol Pyro- gallol kondensiert. PATENT CLAIM: Process for the production of a chromable dye of the triarylmethane series, characterized in that 1 mol. 5-oxytrimellitic anhydride is mixed with \? Mol pyrogallol condenses. Der so erhaltene Farbstoff färbt Wolle aus saurem Bade in roten Tönen, die beim Nachchromieren violett werden und aus- gezeichnete Echtheitseigenschaften besitzen. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kondensation durch Verschmelzen der Reaktionskomponen ten bei 190-200' C unter Luftabschluss während 3-4 Stunden bewirkt. The dyestuff obtained in this way dyes wool from an acid bath in red shades, which turn violet on re-chrome plating and have excellent fastness properties. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that the condensation is brought about by fusing the reaction components at 190-200 ° C in the absence of air for 3-4 hours.
CH210508D 1936-03-27 1937-03-25 Process for the preparation of a chromable dye of the triarylmethane series. CH210508A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE210508X 1936-03-27
CH198713T 1938-12-20

Publications (1)

Publication Number Publication Date
CH210508A true CH210508A (en) 1940-07-15

Family

ID=25723149

Family Applications (1)

Application Number Title Priority Date Filing Date
CH210508D CH210508A (en) 1936-03-27 1937-03-25 Process for the preparation of a chromable dye of the triarylmethane series.

Country Status (1)

Country Link
CH (1) CH210508A (en)

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