CH116154A - Process for the preparation of a new chromable dye of the triphenylmethane series. - Google Patents

Process for the preparation of a new chromable dye of the triphenylmethane series.

Info

Publication number
CH116154A
CH116154A CH116154DA CH116154A CH 116154 A CH116154 A CH 116154A CH 116154D A CH116154D A CH 116154DA CH 116154 A CH116154 A CH 116154A
Authority
CH
Switzerland
Prior art keywords
dye
new
chromable
preparation
triphenylmethane 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 CH116154A publication Critical patent/CH116154A/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

Landscapes

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

Description

  

  Verfahren zur Darstellung eines neuen     ehromierbaren        Farbstoffes     der     Triphenylmethanreihe.       Das vorliegende Patent betrifft ein Ver  fahren zur Darstellung eines neuen     ohromier-          baren    Farbstoffes der     Triphenylmethanreihe.     Das Verfahren ist dadurch gekennzeichnet,  dass man     2.6-Dichlor-l-benzaldehyd    mit       2.4-Dihydroxy-8-rriethyl-benzo:esäure    kon  densiert und das erhältliche     Leukoprodukt     oxydiert.  



       Beispiel     Man löst 15 Gewichtsteile 2.     6-Dichlor-          1-benzaldehyd    und 28 Gewichtsteile 2.     4-Di-          hydroxy-8-methylbenzoesäure    (durch     Kar-          bonisierung    von 2.     6-Dihydroxytoluol    erhal  ten, Schmelzpunkt 206-20.7   C) in starker  Schwefelsäure und rührt die Mischung, bis  das     Leukoprodukt    gebildet ist, welches durch  Eingiessen der Mischung in Eiswasser abge  schieden und durch     Abfiltrieren        isoliert    wer  den kann, um     nachher    oxydiert zu werden.

    Zur Herstellung des Farbstoffes ist aber eine  Isolierung des     Leukoproduktes    nicht notweh  '     dig    und man kann auch zur     obgenannten    Mi  schung in starker Schwefelsäure     nach    Be-         endigung    der Kondensation 7 Gewichtsteile       salpetrigsaures    Natrium hinzufügen,     und     bei 20 bis 50   rühren, bis die Bildung des  Farbstoffes vollständig ist, wonach man auf  Eis giesst und     abfiltriert.    Man erhält ein im  trockenen Zustande braunes Pulver.

   Der  Farbstoff hat die Formel  
EMI0001.0030     
    Er färbt Wolle in saurem Bade in scharlach  roten Nuancen, welche     nachchromiert    in ein  intensives     Rot    übergehen.



  Process for the preparation of a new honorable dye of the triphenylmethane series. The present patent relates to a process for the preparation of a new othromable dye of the triphenylmethane series. The process is characterized in that 2,6-dichloro-1-benzaldehyde is condensed with 2,4-dihydroxy-8-triethyl-benzoic acid and the leuco product available is oxidized.



       EXAMPLE 15 parts by weight of 2,6-dichloro-1-benzaldehyde and 28 parts by weight of 2,4-dihydroxy-8-methylbenzoic acid (obtained by carbonization of 2,6-dihydroxytoluene, melting point 206-20.7 ° C.) are strongly dissolved Sulfuric acid and stir the mixture until the leuco product is formed, which separated out by pouring the mixture into ice water and isolated by filtration who can to be oxidized afterwards.

    To prepare the dye, however, it is not necessary to isolate the leuco product and you can also add 7 parts by weight of sodium nitrous acid to the above-mentioned mixture in strong sulfuric acid after the condensation has ended, and stir at 20 to 50 times until the dye is completely formed is, after which it is poured onto ice and filtered off. A powder which is brown when dry is obtained.

   The dye has the formula
EMI0001.0030
    He dyes wool in an acidic bath in scarlet red nuances, which, when chromed, turn into an intense red.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen chromierbaren Farbstoffes der Triphenyl- methanreihe, dadurch gekennzeichnet,, dass man 2. 6-Dichlor-l-benzaldehyd mit 2. 4-Di- hydroxy-3-methyl-benzoesäure kondensiert und das erhältliche Leukoprodukt oxydiert.. Der so erhältliche Farbstoff stellt im trocke- nen Zustande ein braunes Pulver dar und färbt Wolle aus saurem Bade in scharlach roten Nuancen, die nachchromiert in ein in tensives Rot übergehen. PATENT CLAIM: Process for the production of a new chromable dye of the triphenyl methane series, characterized in that 2. 6-dichloro-1-benzaldehyde is condensed with 2. 4-dihydroxy-3-methylbenzoic acid and the leuco product available is oxidized. The dyestuff obtainable in this way is a brown powder when dry and dyes wool from an acid bath in scarlet shades which, when chromed, turn into a deep red.
CH116154D 1925-03-06 1925-03-06 Process for the preparation of a new chromable dye of the triphenylmethane series. CH116154A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH116154T 1925-03-06

Publications (1)

Publication Number Publication Date
CH116154A true CH116154A (en) 1926-08-02

Family

ID=4375161

Family Applications (1)

Application Number Title Priority Date Filing Date
CH116154D CH116154A (en) 1925-03-06 1925-03-06 Process for the preparation of a new chromable dye of the triphenylmethane series.

Country Status (1)

Country Link
CH (1) CH116154A (en)

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