CH203596A - 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
CH203596A
CH203596A CH203596DA CH203596A CH 203596 A CH203596 A CH 203596A CH 203596D A CH203596D A CH 203596DA CH 203596 A CH203596 A CH 203596A
Authority
CH
Switzerland
Prior art keywords
water
azo dye
soluble azo
preparation
brown
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 CH203596A publication Critical patent/CH203596A/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 diano  tiertes     o-Aminoanisol    mit     2-(Sulfoäthylamino)-          8-naphtol-6-sulfonsäurein        alkalischemMedium     vereinigt.  



  <I>Beispiel:</I>  24,6 Gewichtsteile     o-Aminoanisol        (Mol.-          Gew.    123) werden in 100 Gewichtsteilen  Wasser in Gegenwart von Eis und über  schüssiger Salzsäure mit 13,8 Gewichtsteilen       Natriumnitrit    dianotiert.

   Die erhaltene     Diazo-          lösung    fliesst allmählich unter kräftigem       Rübren    bei 0   in eine wässerige Lösung  von 72 Gewichtsteilen     2-(sulfoäthylamino)-          8-naphtol-6-sulfonsaurem    Natrium     (Mol.-Gew.     347) und 50 Gewichtsteilen     calciniertexn          Natriumcarbonat.    Nach beendeter Kupplung    wird der     Farbstoff    mit Kochsalz ausgeschie  den, filtriert und getrocknet.  



  Er bildet ein dunkelbraunes Pulver, das  sich in Wasser mit     rötlichbrauner    Farbe  löst und Leder in braunen Tönen gut durch  färbt.



  Process for the preparation of a water-soluble azo dye. The subject matter of the present additional patent is a process for the production of a water-soluble azo dye, which is characterized in that dianoated o-aminoanisole is combined with 2- (sulfoethylamino) -8-naphthol-6-sulfonic acid in an alkaline medium.



  <I> Example: </I> 24.6 parts by weight of o-aminoanisole (mol. Wt. 123) are dianotized with 13.8 parts by weight of sodium nitrite in 100 parts by weight of water in the presence of ice and excess hydrochloric acid.

   The diazo solution obtained gradually flows with vigorous stirring at 0 into an aqueous solution of 72 parts by weight of 2- (sulfoethylamino) -8-naphthol-6-sulfonic acid sodium (mol. Wt. 347) and 50 parts by weight of calcined sodium carbonate. When the coupling is complete, the dye is precipitated with sodium chloride, filtered and dried.



  It forms a dark brown powder that dissolves in water with a reddish-brown color and dyes leather well in brown tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines wasser löslichen Azofarbstoffes, dadurch gekenn zeichnet, dass man dianotiertes o-Aminoanisol mit 2-(Sulfoäthylamino)-8-naphtol-6-sulfon- säure in alkalischem Medium vereinigt. Der so erhaltene Farbstoff bildet ein dunkelbraunes Pulver, das sich in Wasser mit rötlichbrauner Farbe löst und Leder in braunen Tönen gut durchfärbt. Claim: Process for the production of a water-soluble azo dye, characterized in that dianotated o-aminoanisole is combined with 2- (sulfoethylamino) -8-naphthol-6-sulfonic acid in an alkaline medium. The dyestuff thus obtained forms a dark brown powder which dissolves in water with a reddish-brown color and dyes leather in brown tones well.
CH203596D 1935-10-15 1936-10-09 Process for the preparation of a water-soluble azo dye. CH203596A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE203596X 1935-10-15
CH199460T 1938-08-31

Publications (1)

Publication Number Publication Date
CH203596A true CH203596A (en) 1939-03-15

Family

ID=25723293

Family Applications (1)

Application Number Title Priority Date Filing Date
CH203596D CH203596A (en) 1935-10-15 1936-10-09 Process for the preparation of a water-soluble azo dye.

Country Status (1)

Country Link
CH (1) CH203596A (en)

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