CH222697A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH222697A
CH222697A CH222697DA CH222697A CH 222697 A CH222697 A CH 222697A CH 222697D A CH222697D A CH 222697DA CH 222697 A CH222697 A CH 222697A
Authority
CH
Switzerland
Prior art keywords
acid
red
amino
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 CH222697A publication Critical patent/CH222697A/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     1Vlonoazofarbstoifes.       Gegenstand des vorliegenden Zusatz  patentes ist ein Verfahren zur Herstellung  eines     Monoazofarbstoffes,    welches dadurch  gekennzeichnet ist,     dass        diazotierte        2-Amino-          4'-chlor-diphenylsulfon-3'-sulfonsäure    in sau  rem Medium mit     2-Amino-8-ogynaphthalin-          6-sulfonsäure    gekuppelt wird.  



  Der neue Farbstoff, ein rotes Pulver,  welches sieh in Wasser mit     gelbstichig    roter,  in     konz.    Schwefelsäure mit     violettroter    Farbe  löst, liefert auf Wolle aus saurem Bade  gleichmässige rote Färbungen, die sich durch  sehr gute Lichtechtheit     auszeichnen.     



       Beispiel:          34,75    Teile     2-Amino-4'-chlor-diphenyl-          sulfon-3'-sulfonsäure    werden nach     bekannten     Methoden indirekt     diazotiert.    Die     Diazonium-          verbindung    gibt man zu einer kongosauren  Suspension von 24 Teilen     2-Amino-8-ogy-          xiaphthalin-6-sulfonsäure    und stumpft dar  auf die Mineralsäure in üblicher     Weise    bis  zur schwach kongosauren Reaktion ab. Die         Kupplung    ist in kurzer Zeit beendet.

   Man  erhält einen Farbstoff, der nach dem Fil  trieren und Trocknen ein rotes Pulver bildet,  das sich in Wasser mit     gelbstichig    roter, in       konz.    Schwefelsäure mit     violettroter    Farbe  löst und auf Wolle aus saurem Bade gleich  mässige rote     Färbungen.    liefert, die sich durch  sehr gute Lichtechtheit auszeichnen.



  Process for the preparation of a 1Vlonoazo dye. The subject of the present additional patent is a process for the production of a monoazo dye, which is characterized in that diazotized 2-amino-4'-chloro-diphenylsulphone-3'-sulphonic acid in an acidic medium with 2-amino-8-ogynaphthalene- 6- sulfonic acid is coupled.



  The new dye, a red powder, which looks yellowish red in water, in conc. Sulfuric acid dissolves with a violet-red color, provides uniform red colorations on wool from an acid bath, which are characterized by very good lightfastness.



       Example: 34.75 parts of 2-amino-4'-chloro-diphenylsulfone-3'-sulfonic acid are diazotized indirectly by known methods. The diazonium compound is added to a Congo acid suspension of 24 parts of 2-amino-8-ogyxiaphthalene-6-sulfonic acid and blunted to the mineral acid in the usual way until a weak Congo acid reaction occurs. The coupling is completed in a short time.

   A dye is obtained which, after Filtrate and drying, forms a red powder which, in water with a yellowish red, in conc. Sulfuric acid dissolves with a violet-red color and uniform red colorations on wool from an acid bath. supplies, which are characterized by very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Mono- azofarbstoffes, dadurch gekennzeichnet, dass diazotierte 2-Amino-4'-chlor-diphenylsulfon- säure in saurem Medium mit 2-Amino-8-ogy- naphthalin-6-sulfonsäure gekuppelt wird. Der neue Farbstoff, ein rotes Pulver, welches sich in Wasser mit gelbstichig roter, in konz. Schwefelsäure mit violettroter Farbe löst, liefert auf Wolle aus saurem Bade gleichmässige rote Färbungen, PATENT CLAIM: Process for the production of a monoazo dye, characterized in that diazotized 2-amino-4'-chloro-diphenylsulphonic acid is coupled with 2-amino-8-ogynaphthalene-6-sulphonic acid in an acid medium. The new dye, a red powder, which turns yellowish red in water, in conc. Sulfuric acid dissolves with a violet-red color, provides uniform red dyes on wool from an acid bath, die sich durch sehr gute Lichtechtheit auszeichnen. which are characterized by very good lightfastness.
CH222697D 1940-04-26 1940-04-26 Process for the preparation of a monoazo dye. CH222697A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH219931T 1940-04-26
CH222697T 1940-04-26

Publications (1)

Publication Number Publication Date
CH222697A true CH222697A (en) 1942-07-31

Family

ID=25726369

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222697D CH222697A (en) 1940-04-26 1940-04-26 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH222697A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4918183A (en) * 1982-08-04 1990-04-17 Ciba-Geigy Corporation Monoazo dyes, process for their preparation, and the use thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4918183A (en) * 1982-08-04 1990-04-17 Ciba-Geigy Corporation Monoazo dyes, process for their preparation, and the use thereof

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