CH209093A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH209093A
CH209093A CH209093DA CH209093A CH 209093 A CH209093 A CH 209093A CH 209093D A CH209093D A CH 209093DA CH 209093 A CH209093 A CH 209093A
Authority
CH
Switzerland
Prior art keywords
azo dye
dark brown
mol
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 CH209093A publication Critical patent/CH209093A/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/28—Disazo dyes characterised by the tetrazo component the tetrazo component containing two aryl nuclei linked by at least one of the groups —CON<, —SO2N<, —SO2—, or —SO2—O—

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 203428.         Torfahren    zur Herstellung eines     Azofarbstoffes.       Gegenstand des vorliegenden Patentes  ist ein Verfahren zur Herstellung eines     Azo-          farbstoffes.    Das Verfahren besteht darin,  dass man die     Tetrazoverbindung    aus     5-p-          Aminobenzoyl    - 2     -phenylendiamincarboirsäure     zunächst mit 1     Mol        Salicylsäure    und dann mit  1     Mol        2-Phenyl-8-naphthol-6-sulfosäure    kup  pelt.

   Der neue     Farbstoff    stellt ein dunkles Pulver  dar und färbt Baumwolle dunkelbraun; Nach  behandeln mit kupferabgebenden Mitteln führt  zu einer sehr wasch- und lichtechten, gelb  stichig dunkelbraunen Färbung.         Beispiel:     27,1 Teile     5-p-Aminobenzoyl-2-phenyl-          endiamincarbonsäure    werden mit 13,8 Teilen       Natriumnitrit    salzsauer     diazotiert.    In der ge  wonnenen, von etwaigen Verunreinigungen  durch Filtrieren befreiten Lösung wird unter  Eiskühlung mit Soda die freie Mineralsäure  neutralisiert,

   dann wird mit einer neutralen    Lösung von 15 Teilen     Salicylsäure    und 140  Teilen 20     0%iger        Sodalösung    verrührt. Nach  3 bis 4 Stunden ist die halbseitige Kupplung  beendet, eine     Tüpfelprobe    auf     Filtrierpapier     zeigt einen braungelben Niederschlag mit  farblosem Auslauf, der sich mit alkalischer       ss-Naphthollösung    nicht mehr verfärbt.

   Jetzt  werden eine neutrale Lösung von 31,5 Teilen       2-Phenyl-8-naphthol-6-sulfosäure    und 90 Tei  len 20     0%iger        Sodalösung        zugerührt.    Am fol  genden Tag wird der entstandene Farbstoff       abfiltriert.    Er färbt Baumwolle dunkelbraun;  Nachbehandeln mit kupferabgebenden Mitteln  führt zu einer sehr wasch- und lichtechten,       gelbstichig    dunkelbraunen Färbung.



  <B> Additional patent </B> to main patent no. 203428. Gate drives for the production of an azo dye. The present patent relates to a process for the production of an azo dye. The process consists in that the tetrazo compound of 5-p-aminobenzoyl-2-phenylenediaminecarboic acid is coupled first with 1 mol of salicylic acid and then with 1 mol of 2-phenyl-8-naphthol-6-sulfonic acid.

   The new dye is a dark powder and dyes cotton dark brown; After treatment with copper-releasing agents it leads to a very washable and lightfast, yellow-tinged dark brown color. Example: 27.1 parts of 5-p-aminobenzoyl-2-phenylenediamine carboxylic acid are diazotized with hydrochloric acid with 13.8 parts of sodium nitrite. In the obtained solution, freed from any impurities by filtration, the free mineral acid is neutralized with soda under ice cooling,

   then it is stirred with a neutral solution of 15 parts of salicylic acid and 140 parts of 20% strength soda solution. After 3 to 4 hours, the half-sided coupling is complete, a spot test on filter paper shows a brownish-yellow precipitate with a colorless discharge which no longer changes color with alkaline ß-naphthol solution.

   Now a neutral solution of 31.5 parts of 2-phenyl-8-naphthol-6-sulfonic acid and 90 Tei len 20 0% soda solution are added. On the following day, the resulting dye is filtered off. He dyes cotton dark brown; Post-treatment with copper-releasing agents leads to a very washable and lightfast, yellowish dark brown color.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man die Tetrazoverbindung aus 5-p-Amino- benzoyl - 2 - phenylendiamincarbonsäure zu- nächst mit 1 Mol Salicylsäiire und dann mit 1 Mol 2-Phenyl-8-naplithol-6-sulfosäure kuppelt. PATENT CLAIM: A process for the production of an azo dye, characterized in that the tetrazo compound from 5-p-aminobenzoyl-2-phenylenediamine-carboxylic acid is first mixed with 1 mol of salicylic acid and then with 1 mol of 2-phenyl-8-naplithol-6 -sulfonic acid couples. Der neue Farbstoff stellt ein dunkles Pulver dar und färbt Baumwolle dunkel- braun; Nachbehandeln mit kupferabgebenden Mitteln führt zu einer sehr wasch- und licht echten, gelbstichig dunkelbraunen Färbung. The new dye is a dark powder and dyes cotton dark brown; Post-treatment with copper-releasing agents leads to a very washable and lightfast, yellowish dark brown color.
CH209093D 1937-03-04 1938-02-17 Process for the preparation of an azo dye. CH209093A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE209093X 1937-03-04
CH203428T 1938-02-17

Publications (1)

Publication Number Publication Date
CH209093A true CH209093A (en) 1940-03-15

Family

ID=25723933

Family Applications (1)

Application Number Title Priority Date Filing Date
CH209093D CH209093A (en) 1937-03-04 1938-02-17 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH209093A (en)

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