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CH222695A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH222695A
CH222695A CH222695DA CH222695A CH 222695 A CH222695 A CH 222695A CH 222695D A CH222695D A CH 222695DA CH 222695 A CH222695 A CH 222695A
Authority
CH
Switzerland
Prior art keywords
sulfonic acid
red
acid
monoazo dye
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH222695A publication Critical patent/CH222695A/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 Darstellung eines     bfonoazofarlostoifes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung eines       Monoazofarbstoffes,    welches dadurch gekenn  zeichnet ist, dass     diazotierte    2-Aminobenzol-l       sulfonsäure-N-äthvl-N-phenylamid-3'-sulfon-          säure    in saurem Medium mit     2-Amino-8-oxy-          naphtbalin-6-sulfonsäure    gekuppelt wird.  



  Der neue     Farbstoff,    ein     violettrotes    Pulver,  welches sich in Wasser mit roter, in konzen  trierter Schwefelsäure mit trüb roter Farbe  löst, liefert auf Wolle aus saurem Bade gleich  mässige rote Färbungen, die sich durch sehr  gute Lichtechtheit auszeichnen.  



  <I>Beispiel:</I>  35,6 Teile     2-Aminobenzol-l-sulfonsäure-N-          äthyl-N-phenylamid-3'-sulfonsäure    werden  nach bekannten Methoden indirekt     diazotiert.     Die     Diazoniumverbindung    gibt man zu  einer kongosauren Suspension von 24 Teilen       2-Amino-8-oxynaphthalin-6-sulfonsäure    und  stumpft darauf die     Mineralsäure    in üblicher  Weise bis zur sehwach kongosauren Reaktion    ab. Die Kupplung ist in kurzer Zeit beendet.

    Man erhält einen     Farbstoff,    der nach dem  Filtrieren und Trocknen ein     violettrotes    Pulver  bildet, das sich in Wasser mit roter, in kon  zentrierter Schwefelsäure mit trüb roter Farbe  löst und auf Wolle aus saurem Bade gleich  mässig rote Färbungen     liefert,    die sich durch  sehr gute Lichtechtheit auszeichnen.



  Method for the representation of a bfonoazofarlostoifes. The subject of the present additional patent is a process for the production of a monoazo dye, which is characterized in that diazotized 2-aminobenzene-l-sulfonic acid-N-ether-N-phenylamide-3'-sulfonic acid in acidic medium with 2-amino 8-oxynaphtbalin-6-sulfonic acid is coupled.



  The new dye, a violet-red powder, which dissolves in water with red, in concentrated sulfuric acid with a cloudy red color, provides uniform red dyeings on wool from an acid bath, which are characterized by very good lightfastness.



  <I> Example: </I> 35.6 parts of 2-aminobenzene-1-sulfonic acid-N-ethyl-N-phenylamide-3'-sulfonic acid are indirectly diazotized by known methods. The diazonium compound is added to a Congo-acid suspension of 24 parts of 2-amino-8-oxynaphthalene-6-sulfonic acid and the mineral acid is then blunted in the usual way until the Congo-acid reaction is weak. The coupling is completed in a short time.

    A dye is obtained which, after filtering and drying, forms a violet-red powder which dissolves in water with red, in concentrated sulfuric acid with a cloudy red color and gives evenly red dyeings on wool from an acid bath, which are very lightfast distinguish.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Monoazo- farbstoffes, dadurch gekennzeichnet, dass di- azotierte 2-Aminobenzol-l-sulfonsäure-N-äthyl- N-pheriylamid-3'-sulfonsäure in sauremMedium mit 2-Amino-8-oxynaphthalin-6-sulfonsäure ge kuppelt wird. Der neue Farbstoff, ein violettrotes Pulver, das sich in Wasser mit roter, in konzentrierter Schwefelsäure mit trüb roter Farbe löst, liefert auf Wolle aus saurem Bade gleich mässig rote Färbungen, die sich durch sehr gute Lichtechtheit auszeichnen. PATENT CLAIM: Process for the production of a monoazo dye, characterized in that diazotized 2-aminobenzene-l-sulfonic acid-N-ethyl-N-pheriylamide-3'-sulfonic acid in acidic medium with 2-amino-8-oxynaphthalene-6- sulfonic acid is coupled. The new dye, a violet-red powder that dissolves in water with a red color and in concentrated sulfuric acid with a cloudy red color, provides evenly red colorations on wool from an acid bath, which are characterized by very good lightfastness.
CH222695D 1940-04-26 1940-04-26 Process for the preparation of a monoazo dye. CH222695A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH222695T 1940-04-26
CH219931T 1940-04-26

Publications (1)

Publication Number Publication Date
CH222695A true CH222695A (en) 1942-07-31

Family

ID=25726367

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222695D CH222695A (en) 1940-04-26 1940-04-26 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH222695A (en)

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