CH204523A - Process for the production of a chromium-containing dye. - Google Patents

Process for the production of a chromium-containing dye.

Info

Publication number
CH204523A
CH204523A CH204523DA CH204523A CH 204523 A CH204523 A CH 204523A CH 204523D A CH204523D A CH 204523DA CH 204523 A CH204523 A CH 204523A
Authority
CH
Switzerland
Prior art keywords
chromium
production
dye
containing dye
parts
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 CH204523A publication Critical patent/CH204523A/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
    • C09B55/00—Azomethine dyes

Landscapes

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

Description

  

  Verfahren zur Herstellung eines     ehromhaltigen        Farbstoffes.       Es wurde gefunden, dass man einen wert  vollen neuen chromhaltigen Farbstoff er  hält, wenn man     4-Nitro-2-aminophenol-6-sul-          fonsäure    mit     Salicylaldehyd    umsetzt und die  entstehende     Azomethinverbindung    mit einem  chromabgebenden     Mittel    behandelt.  



  Man kann dabei sowohl bei gewöhnlichem  als auch bei erhöhtem Druck arbeiten.  



  Der neue Farbstoff kann zum Beispiel  zum Färben von Lacken, Wolle, Seide, Leder,  Baumwolle oder     Kunstseide    verwendet wer  den. Er ist auch zum Färben in saurem  Bade     geeignet.     



  <I>Beispiel:</I>  Zu einem siedenden Gemisch von 23,4       Teilen        4-Nitro-2-aminophenol-6-sulfonsäure,     28 Teilen kristallisiertem     Natriumacetat,    12,2  Teilen     Salicylaldehyd        und    200 Teilen Was  ser gibt man eine     Chromformiatlösung,    die  aus 37,2 Teilen eines     24,5prozentigen    Chrom  ogydteiges, 19 Teilen 85prozentiger Ameisen  säure und 100 Teilen Wasser hergestellt ist.

    Nach etwa     dreistündigem    Kochen unter         Rückfluss    wird die Lösung eingedampft.     Man     kann auch die erhaltene     Verbindung    aus  salzen, absaugen und trocknen.  



  Der Farbstoff entsteht auch, wenn man  das     Umsetzungsgemisch    2     Stunden    lang auf  120' C erhitzt. Er färbt Wolle, Seide oder  Leder gleichmässig und echt in gelben Tönen.  



  An Stelle von     Chromformiat    kann man  auch andere Chromsalze anwenden.



  Process for the preparation of a dye containing Ehrom. It has been found that a valuable new chromium-containing dye is obtained if 4-nitro-2-aminophenol-6-sulphonic acid is reacted with salicylaldehyde and the resulting azomethine compound is treated with a chromium-releasing agent.



  You can work at both normal and increased pressure.



  The new dye can be used, for example, to dye paints, wool, silk, leather, cotton or rayon. It is also suitable for dyeing in an acid bath.



  <I> Example: </I> A chromium formate solution is added to a boiling mixture of 23.4 parts of 4-nitro-2-aminophenol-6-sulfonic acid, 28 parts of crystallized sodium acetate, 12.2 parts of salicylaldehyde and 200 parts of water, which is made from 37.2 parts of a 24.5 percent chromium ogydteiges, 19 parts of 85 percent formic acid and 100 parts of water.

    After refluxing for about three hours, the solution is evaporated. The compound obtained can also be salted, filtered off with suction and dried.



  The dye is also formed when the reaction mixture is heated at 120 ° C. for 2 hours. It dyes wool, silk or leather evenly and genuinely in yellow tones.



  Instead of chromium formate, other chromium salts can also be used.

Claims (1)

PATENTANSPRUCH: Verfahren zür Herstellung eines neuen chromhaltigen Farbstoffes, dadurch gekenn- zeichnet, dass man 4-Nitro-2-aminophenol-6- sulfonsäure mit- Salicylaldehyd umsetzt und die entstehende Azomethinverbindung mit einem chromabgebenden Mittel behandelt. Der neue Farbstoff färbt Lacke, Wolle, Seide oder Leder gleichmässig und echt in gelben Tönen. PATENT CLAIM: Process for the production of a new chromium-containing dye, characterized in that 4-nitro-2-aminophenol-6-sulfonic acid is reacted with salicylaldehyde and the resulting azomethine compound is treated with a chromium-releasing agent. The new dye dyes lacquers, wool, silk or leather evenly and in real yellow tones.
CH204523D 1937-04-16 1938-04-04 Process for the production of a chromium-containing dye. CH204523A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE207827X 1937-04-16

Publications (1)

Publication Number Publication Date
CH204523A true CH204523A (en) 1939-05-15

Family

ID=5793911

Family Applications (1)

Application Number Title Priority Date Filing Date
CH204523D CH204523A (en) 1937-04-16 1938-04-04 Process for the production of a chromium-containing dye.

Country Status (1)

Country Link
CH (1) CH204523A (en)

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