CH203597A - Process for the preparation of a water-soluble azo dye. - Google Patents

Process for the preparation of a water-soluble azo dye.

Info

Publication number
CH203597A
CH203597A CH203597DA CH203597A CH 203597 A CH203597 A CH 203597A CH 203597D A CH203597D A CH 203597DA CH 203597 A CH203597 A CH 203597A
Authority
CH
Switzerland
Prior art keywords
water
soluble azo
azo dye
preparation
dye
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 CH203597A publication Critical patent/CH203597A/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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • 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

Landscapes

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

Description

  

  Verfahren zur Herstellung eines wasserlöslichen     Azofarbstoffes.       Gegenstand des vorliegenden Zusatz  patentes ist ein Verfahren zur Herstellung  eines wasserlöslichen     Azofarbstoffes,    welches  dadurch gekennzeichnet ist, dass man     diazo-          tiertes        p-Chloranilin    mit     2-(Sulfoäthyl-methyl-          amino)-8-naphtol-6-sulfonsäure    in alkalischem  Medium vereinigt.

           Beispiel:       12,75 Gewichtsteile     p-Chloranilin        (Mol.-          Gew.    127,5) werden bei 0-5   C in 200       Volumteilen        Wasser    in Gegenwart von 25       Volumteilen    Salzsäure von 20' Bö mit 6,9  Gewichtsteilen     Natriumnitrit    wie üblich     di-          azotiert.    Die     Diazolösung    fliesst hierauf in  eine auf 0   C gekühlte, wässerige Lösung  von 42 Gewichtsteilen des     Dinatriumsalzes     der     2-(Sulfoäthyl-methylamino)

  -8-napbtol-6-          sulfonsäure        (Mol.-Gew.    405) und 25 Gewichts  teilen     calciniertem        Natriumcarbonat.    Nach    beendeter Kupplung wird der gebildete Farb  stoff     ausgesalzen,    isoliert und getrocknet.  



  Er bildet ein dunkelbraunes Pulver, das  sich in Wasser mit brauner Farbe löst und  Leder in     gelbstichigbraunen    Tönen vollkom  men durchfärbt.



  Process for the preparation of a water-soluble azo dye. The subject of the present additional patent is a process for the production of a water-soluble azo dye, which is characterized in that diazotized p-chloroaniline is combined with 2- (sulfoethyl-methyl-amino) -8-naphthol-6-sulfonic acid in an alkaline medium.

           Example: 12.75 parts by weight of p-chloroaniline (mol. Wt. 127.5) are diazotized with 6.9 parts by weight of sodium nitrite as usual at 0-5 ° C. in 200 parts by volume of water in the presence of 25 parts by volume of hydrochloric acid of 20% . The diazo solution then flows into an aqueous solution, cooled to 0 C, of 42 parts by weight of the disodium salt of 2- (sulfoethyl-methylamino)

  -8-napbtol-6-sulfonic acid (mol. Wt. 405) and 25 parts by weight of calcined sodium carbonate. After the coupling has ended, the dye formed is salted out, isolated and dried.



  It forms a dark brown powder that dissolves in water with a brown color and completely dyes leather in yellowish brown tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines wasser löslichen Azofarbstoffes, dadurch gekenn zeichnet, dass man diazotiertes p-Chloranilin mit 2-(Sulfoäthyl-methylamino)-8-naphtol-6- sulfonsäure in alkalischem Medium vereinigt. Der so erhaltene Farbstoff bildet ein dunkelbraunes Pulver, das sich in Wasser mit brauner Farbe löst und Leder in gelb stichigbraunen Tönen vollkommen durchfärbt. PATENT CLAIM: Process for the production of a water-soluble azo dye, characterized in that diazotized p-chloroaniline is combined with 2- (sulfoethyl-methylamino) -8-naphthol-6-sulfonic acid in an alkaline medium. The dye thus obtained forms a dark brown powder which dissolves in water with a brown color and completely dyes leather in yellow, pungent brown shades.
CH203597D 1935-10-15 1936-10-09 Process for the preparation of a water-soluble azo dye. CH203597A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE203597X 1935-10-15
CH199460T 1938-08-31

Publications (1)

Publication Number Publication Date
CH203597A true CH203597A (en) 1939-03-15

Family

ID=25723294

Family Applications (1)

Application Number Title Priority Date Filing Date
CH203597D CH203597A (en) 1935-10-15 1936-10-09 Process for the preparation of a water-soluble azo dye.

Country Status (1)

Country Link
CH (1) CH203597A (en)

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