CH179967A - Process for the preparation of an acidic dye. - Google Patents

Process for the preparation of an acidic dye.

Info

Publication number
CH179967A
CH179967A CH179967DA CH179967A CH 179967 A CH179967 A CH 179967A CH 179967D A CH179967D A CH 179967DA CH 179967 A CH179967 A CH 179967A
Authority
CH
Switzerland
Prior art keywords
methyl
anisidine
dye
sulfonic acid
preparation
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 CH179967A publication Critical patent/CH179967A/en

Links

Landscapes

  • Coloring (AREA)

Description

  

  Verfahren zur Darstellung eines sauren     Farbstoffes.       Gegenstand des vorliegenden Zusatzpa  tentes ist ein Verfahren zur Darstellung  eines sauren Farbstoffes, welches dadurch  gekennzeichnet ist, dass man 1     Mol        p-Sulfo-          benzaldehyd    mit 2     Mol    durch     Sulfonierung     von     N-Methyl-a-methylindol    hergestellter       N-Methyl-a-methylindol-6-sulf        osäure    konden  siert, die so erhaltene     Leukosulfosäure    - mit  Oxydationsmitteln behandelt und das Oxyda  tionsprodukt mit     p-Anisidin    umsetzt.  



  <I>Beispiel:</I>  1     Mol        p-Sulfobenzaldehyd    wird mit 2       Mol    durch     Sulfonierung    von     N-Methyl-a-          methylindol    hergestellter     N-Methyl-a-me-          thylindol-6-sulfosäure    in Wasser durch  mehrstündiges Erhitzen kondensiert und die  so erhaltene     Leukolösung    mit Schwefelsäure  angesäuert und mit     Bichromat    zum Farb  stoff oxydiert.

   Der Farbstoff wird als Na  triumsalz isoliert und mehrere Stunden mit  überschüssigem     p-Anisidin    auf 120' C er-         hitzt.    Der so erhaltene Farbstoff hat fol  gende     Konstitution:     
EMI0001.0025     
    Er färbt Wolle und Seide     in    klaren     rotsti-          chig    blauen Tönen von hervorragender  Lichtechtheit. An Stelle des     Bichromats     kann man auch     Mangandioxyd    als Oxyda  tionsmittel verwenden.



  Process for the preparation of an acidic dye. The subject of the present additional patent is a process for the preparation of an acidic dye, which is characterized in that 1 mole of p-sulfobenzaldehyde is mixed with 2 moles of N-methyl-a-methylindole produced by sulfonation of N-methyl-a-methylindole 6-sulfonic acid condenses, the leucosulfonic acid obtained in this way - treated with oxidizing agents and the oxidation product is reacted with p-anisidine.



  <I> Example: </I> 1 mole of p-sulfobenzaldehyde is condensed with 2 moles of N-methyl-a-methylindole-6-sulfonic acid produced by sulfonation of N-methyl-a-methylindole in water by heating for several hours, and the The leuco solution thus obtained is acidified with sulfuric acid and oxidized to the dye with bichromate.

   The dye is isolated as the sodium salt and heated to 120 ° C. with excess p-anisidine for several hours. The dye thus obtained has the following constitution:
EMI0001.0025
    It dyes wool and silk in clear, reddish blue tones with excellent lightfastness. Manganese dioxide can also be used as an oxidizing agent instead of bichromate.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines sauren Farbstoffes, dadurch gekennzeichnet, daP man 1 Mol p-Sulfobenzaldelhyd mit 2 Mol durch Sulfonierung von N-Methyl-a-methyl- indol hergestellter N-Methyl-a-methvjindol- 6-sulfosäure kondensiert, die so erhaltene Leukosulfosäure mit Oxydationsmitteln be handelt und das Oxydationsprodukt mit p- Anisidin umsetzt. Claim: Process for the preparation of an acidic dye, characterized in that 1 mole of p-sulfobenzaldelhydrate is condensed with 2 moles of N-methyl-a-methyindole-6-sulfonic acid produced by sulfonation of N-methyl-a-methyl-indole, the so The leucosulfonic acid obtained is treated with oxidizing agents and the oxidation product is reacted with p-anisidine. Die so erhaltene Farbstoffsulfosäure färbt Wolle und Seide in klaren rotstichig blauen Tönen von hervorragender Lichtecht heit. UNTERANSPRÜCHE: 1. Verfahren nach Patentanspruclh, dadurch gekennzeichnet, dass die Kondensation des Aldehyds mit der Indolverbindung durch mehrstündiges Erhitzen der Komponenten in Wasser bewirkt wird. ?. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass die Oxydation der L eukoverbindung derart bewirkt wird. The dye sulfonic acid thus obtained dyes wool and silk in clear, reddish-tinged blue shades of excellent lightfastness. SUBClaims: 1. Process according to patent claim, characterized in that the condensation of the aldehyde with the indole compound is brought about by heating the components in water for several hours. ?. Method according to claim, characterized in that the oxidation of the leuco compound is effected in this way. dass die wässerige Lösung der Leukover- bindung mit Bichromat schwefelsauer oxydiert wird. 3. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass die Umsetzung mit p-Anisidin derart bewirkt wird, dass die als Natriumsalz isolierte Farbstoffsulfo- säure mehrere Stunden mit überschüssi gem p-Anisidin erhitzt wird. that the aqueous solution of the leuco compound is oxidized with sulfuric acid bichromate. 3. The method according to claim, characterized in that the reaction with p-anisidine is effected in such a way that the dye sulfonic acid isolated as the sodium salt is heated with excess p-anisidine for several hours.
CH179967D 1933-05-11 1934-05-11 Process for the preparation of an acidic dye. CH179967A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE179967X 1933-05-11
CH176040T 1934-05-11

Publications (1)

Publication Number Publication Date
CH179967A true CH179967A (en) 1935-09-30

Family

ID=25719804

Family Applications (1)

Application Number Title Priority Date Filing Date
CH179967D CH179967A (en) 1933-05-11 1934-05-11 Process for the preparation of an acidic dye.

Country Status (1)

Country Link
CH (1) CH179967A (en)

Similar Documents

Publication Publication Date Title
CH179967A (en) Process for the preparation of an acidic dye.
CH179966A (en) Process for the preparation of an acidic dye.
DE621476C (en) Process for the preparation of acidic dyes
CH210521A (en) Process for the preparation of an acidic dye of the triphenylmethane series.
CH211052A (en) Process for the preparation of a chromable triarylmethane dye.
CH176236A (en) Process for the production of a nitrogenous vat dye of the anthraquinone series.
CH193257A (en) Process for the production of an acidic wool dye.
CH193252A (en) Process for the production of an acidic wool dye.
CH110287A (en) Process for the production of a new dye.
CH163012A (en) Process for the preparation of a dye of the triarylmethane series.
CH193258A (en) Process for the production of an acidic wool dye.
CH193250A (en) Process for the production of an acidic wool dye.
CH216320A (en) Process for the production of an acidic wool dye.
CH151156A (en) Process for the preparation of a vat dye of the anthraquinone series.
CH193246A (en) Process for the production of an acidic wool dye.
CH195224A (en) Process for the preparation of a chromable monoazo dye.
CH216319A (en) Process for the production of an acidic wool dye.
CH215844A (en) Process for the preparation of a basic triphenylmethane dye.
CH186744A (en) Process for the production of a new anthraquinone dye.
CH116588A (en) Process for the preparation of a new vat dye of the perylene series.
CH180697A (en) Process for the preparation of a dye of the anthraquinone series.
CH211051A (en) Process for the preparation of a chromable triarylmethane dye.
CH155453A (en) Process for the preparation of a new monoazo dye.
CH93738A (en) Process for the preparation of a chromium compound of a mordant dye.
CH142162A (en) Process for the preparation of a new dye of the triphenylmethane series.