CH202438A - Process for the preparation of a water-soluble monoazo dye. - Google Patents

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

Info

Publication number
CH202438A
CH202438A CH202438DA CH202438A CH 202438 A CH202438 A CH 202438A CH 202438D A CH202438D A CH 202438DA CH 202438 A CH202438 A CH 202438A
Authority
CH
Switzerland
Prior art keywords
water
preparation
monoazo dye
soluble monoazo
amino
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 CH202438A publication Critical patent/CH202438A/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
    • 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     tüonoazofarbstoffes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung     eines     wasserlöslichen     Monoazofarbstoffes,    welches  dadurch gekennzeichnet ist; dass man     diazo-          tiertes        3-Amino-1,4-di-(sulfomethyl)-benzol     mit     2-Phenylamino-8-naphthol-6-sulfonsäure     in alkalischem Medium vereinigt.  



  <I>Beispiel:</I>  28,1 Gewichtsteile     3-Amino-1,4-di-(sulfo-          methyl)-benzol        (Mol.-Gew.    281) werden auf  übliche Weise in Gegenwart von Eis und  überschüssiger Salzsäure mit 6,9 Gewichts  teilen     Natriumnitrit        diazotiert.    Die erhal  tene     Diazolösung        wird    bei 0   C     in    Gegen  wart von überschüssigem     Natriumcarbonat     mit 35     Gewichtsteilen    2 -     phenylamino-8-          naphthol-6-sulfonsaurem    Natrium vereinigt.

    Nach beendeter     Kupplung    wird der Farb-         stoff    abgeschieden     und    getrocknet. Er bildet  ein schwarzbraunes Pulver, das sich in Was  ser mit rötlich brauner Farbe löst und Leder  in     braunen    Tönen stark einfärbt.



  Process for the preparation of a water-soluble tuonoazo dye. The subject of the present additional patent is a process for the production of a water-soluble monoazo dye, which is characterized; that diazotized 3-amino-1,4-di- (sulfomethyl) -benzene is combined with 2-phenylamino-8-naphthol-6-sulfonic acid in an alkaline medium.



  <I> Example: </I> 28.1 parts by weight of 3-amino-1,4-di- (sulfomethyl) -benzene (mol. Wt. 281) are mixed in the usual way in the presence of ice and excess hydrochloric acid 6.9 parts by weight sodium nitrite diazotized. The diazo solution obtained is combined with 35 parts by weight of 2-phenylamino-8-naphthol-6-sulfonic acid sodium at 0 C in the presence of excess sodium carbonate.

    When the coupling is complete, the dye is deposited and dried. It forms a blackish-brown powder that dissolves in water with a reddish-brown color and strongly dyes leather in brown tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines wasser löslichen Monoazofarbstoffes, dadurch ge kennzeichnet, dass man diazotiertes 3-Amino- 1,4-'di-(sulfomethyl)'-benzol mit 2-Phenyl- amino-8-naphthol-6-sulfonsäure in alkali schem Medium vereinigt. Der so erhaltene Farbstoff bildet ein schwarzbraunes Pulver, das sich in Wasser mit rötlich brauner Farbe löst und Leder in braunen Tönen stark einfärbt. Claim: Process for the preparation of a water-soluble monoazo dye, characterized in that diazotized 3-amino-1,4-'di- (sulfomethyl) '- benzene with 2-phenyl-amino-8-naphthol-6-sulfonic acid in alkali medium. The dye obtained in this way forms a black-brown powder which dissolves in water with a reddish brown color and strongly dyes leather in brown tones.
CH202438D 1936-04-11 1937-04-05 Process for the preparation of a water-soluble monoazo dye. CH202438A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202438X 1936-04-11
CH199187T 1938-08-15

Publications (1)

Publication Number Publication Date
CH202438A true CH202438A (en) 1939-01-15

Family

ID=25723229

Family Applications (1)

Application Number Title Priority Date Filing Date
CH202438D CH202438A (en) 1936-04-11 1937-04-05 Process for the preparation of a water-soluble monoazo dye.

Country Status (1)

Country Link
CH (1) CH202438A (en)

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