CH261837A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH261837A
CH261837A CH261837DA CH261837A CH 261837 A CH261837 A CH 261837A CH 261837D A CH261837D A CH 261837DA CH 261837 A CH261837 A CH 261837A
Authority
CH
Switzerland
Prior art keywords
amino
preparation
dye
monoazo dye
red
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH261837A publication Critical patent/CH261837A/en

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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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid
    • 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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

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

Description

  

  Verfahren zur Herstellung eines     Monoazofarbstoffes.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung eines     Monoazo-          farbstoffes.    Das Verfahren ist dadurch ge  kennzeichnet, dass man     diazotierte        5-[3'-          Amino-@4'-(p-tolylsulfon)        -benzoyl]-amino-2-          o--xy-benzoesäure    mit     2-Amino-8-oxy-naphtha-          lin-6-sulfonsäure    kuppelt.  



  Der so erhaltene Farbstoff ist ein rotvio  lettes Pulver, das in Wasser in der Wärme  leicht löslich ist und Wolle aus saurem Bad  in lebhaft blauroten Tönen färbt, welche  beim     Nachchromieren    etwas blaustichiger  werden.  



  <I>Beispiel:</I>  85,2 Gewichtsteile     5-[3'-Amino-4'-(p-tolyl-          sulfan)        -benzoyl]        -amino-2-oxy-benzoesäure    wer  den in 700     Volumteilen    Wasser mit Soda neu  tral gelöst, mit 200     Volumteilen        n-Nitrit    ver  mischt und innert einer halben Stunde zu  70     Volumteilen        konz.    Salzsäure in 300     Volum-          teilen    Wasser gegeben, wobei die Temperatur  nicht über 5 bis 7   steigen soll. Die     Diazo-          niumverbindung    fällt zum grössten Teil aus.

    Nach beendeter     Diazotierung    gibt. man bei  höchstens 50 langsam eine schwach     lackmus-          saure    Lösung von 47,8 Gewichtsteilen 2-         Amino-8-oxy-naphthalin-6-sulfonsäure    in 500       Volumteilen    Wasser zu der entstandenen Sus  pension.

   Nach     Beendigung    der     Farbstoffbil-          dung        wird    neutralisiert, auf 800 aufgeheizt,  mit 10      J0    Kochsalz versetzt und nach dem Ab  kühlen auf 200 der ausgeschiedene Farbstoff       abfiltriert.    Getrocknet stellt der Farbstoff ein  rotviolettes, in Wasser in der Wärme leicht  lösliches Pulver dar, das Wolle aus saurem  Bad in lebhaft blauroten Tönen färbt, wel  che beim     Nachchromieren    noch etwas blausti  chiger werden.



  Process for the preparation of a monoazo dye. The present patent relates to a process for the preparation of a monoazo dye. The process is characterized in that diazotized 5- [3'-amino @ 4 '- (p-tolylsulfone) benzoyl] -amino-2- o - xy-benzoic acid with 2-amino-8-oxy- naphthalin-6-sulfonic acid couples.



  The dye obtained in this way is a red-violet powder which is easily soluble in water when heated and dyes wool from an acid bath in vivid blue-red tones, which become a little more bluish when chromium-plating.



  <I> Example: </I> 85.2 parts by weight of 5- [3'-amino-4 '- (p-tolylsulfane) -benzoyl] -amino-2-oxy-benzoic acid in 700 parts by volume of water with soda neutral dissolved, mixed with 200 parts by volume of n-nitrite and concentrated to 70 parts by volume within half an hour. Hydrochloric acid is added to 300 parts by volume of water, the temperature should not rise above 5 to 7. Most of the diazonium compound precipitates.

    When the diazotization is complete. slowly add a weakly litmus acidic solution of 47.8 parts by weight of 2-amino-8-oxynaphthalene-6-sulfonic acid in 500 parts by volume of water to the resulting suspension at a maximum of 50.

   When the formation of the dye has ended, the mixture is neutralized, heated to 800, mixed with 10 J0 sodium chloride and, after cooling to 200, the dye which has separated out is filtered off. When dried, the dye is a red-violet powder that is easily soluble in water when heated, which dyes wool from an acid bath in vivid blue-red tones, which become a little more bluish when they are chromed.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Mono- azofarbstoffes, dadurch gekennzeichnet, dass man diazotierte 5-[3'-Amino-4'-(p-tolylsul- fon)-benzoyl]-amino-2-oxy-benzoesäure mit 2- Amino-8-oxy-naphthalin-6-sulfonsäure kup pelt. Der so erhaltene Farbstoff ist ein rotvio lettes Pulver, das in Wasser in der Wärme leicht löslich ist und Wolle aus saurem Bad in lebhaft blauroten Tönen färbt, welche beim Nachchromieren etwas blaustichiger werden. PATENT CLAIM: Process for the preparation of a monoazo dye, characterized in that diazotized 5- [3'-amino-4 '- (p-tolylsulfon) benzoyl] -amino-2-oxy-benzoic acid with 2-amino 8-oxy-naphthalene-6-sulfonic acid kup pelt. The dye obtained in this way is a red-violet powder which is easily soluble in water when heated and dyes wool from an acid bath in vivid blue-red tones, which become a little more bluish when chromium-plating.
CH261837D 1943-11-23 1943-11-23 Process for the preparation of a monoazo dye. CH261837A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH261837T 1943-11-23
CH255412T 1948-06-30

Publications (1)

Publication Number Publication Date
CH261837A true CH261837A (en) 1949-05-31

Family

ID=25729902

Family Applications (1)

Application Number Title Priority Date Filing Date
CH261837D CH261837A (en) 1943-11-23 1943-11-23 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH261837A (en)

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