CH226842A - Process for the preparation of an acidic disazo dye. - Google Patents

Process for the preparation of an acidic disazo dye.

Info

Publication number
CH226842A
CH226842A CH226842DA CH226842A CH 226842 A CH226842 A CH 226842A CH 226842D A CH226842D A CH 226842DA CH 226842 A CH226842 A CH 226842A
Authority
CH
Switzerland
Prior art keywords
dye
acidic
preparation
disazo dye
acid
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 CH226842A publication Critical patent/CH226842A/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/28—Disazo dyes characterised by the tetrazo component the tetrazo component containing two aryl nuclei linked by at least one of the groups —CON<, —SO2N<, —SO2—, or —SO2—O—

Landscapes

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 223541.    Verfahren zur Darstellung eines sauren     Disazofarbstoffes.       Gegenstand des vorliegenden Zusatz  patentes     ist    ein Verfahren zur Darstellung  eines sauren     Disazofarbstoffes,    dadurch ge  kennzeichnet, dass man     4,4'-Diaminodiphenyl-          sulfon        tetrazotiert    und die     Tetrazoverbindung     mit 2     Mol        2-Amino-8-oxynaphthalin-6-sulfon-          säure    in saurer     Lösung    kuppelt.  



  <I>Beispiel:</I>  24,8 Teile     4,4'-Diaminodiphenylsulfon     werden in üblicher Weise     tetrazotiert.    Die       Tetrazoniumlösung    kuppelt man mit 47,8 Tei  len     2-Amino-8-ogynaphthalin-6-sulfonsäure,     die man in 200     Teilen    Wasser mit der nöti  gen     Sodamenge    neutral ,gelöst und wieder mit  Salzsäure durch Ansäuern bis zu kongosaurer  Reaktion ausgefällt hat. Die Kupplung er  folgt langsam, durch Erwärmen und Zusatz  von     Natriumacetat    kann sie jedoch beschleu  nigt werden.

   Nach Beendigung der     Farb-          stoffbildung    stellt man     mit        Sodalösung       kongoneutral, filtriert und trocknet. Der  Farbstoff, ein dunkelrotes Pulver, löst sich  in Wasser blaustichig rot, in konzentrierter  Schwefelsäure     rotviolett    und färbt Wolle aus  saurem Bade in blaustichig     roten,    lichtechten  Tönen.



      Additional patent to main patent No. 223541. Process for the preparation of an acidic disazo dye. The subject of the present additional patent is a process for the preparation of an acidic disazo dye, characterized in that 4,4'-diaminodiphenylsulfone is tetrazotized and the tetrazo compound with 2 moles of 2-amino-8-oxynaphthalene-6-sulfonic acid in acidic Solution couples.



  <I> Example: </I> 24.8 parts of 4,4'-diaminodiphenyl sulfone are tetrazotized in the usual way. The tetrazonium solution is coupled with 47.8 parts of 2-amino-8-ogynaphthalene-6-sulfonic acid, which is neutralized in 200 parts of water with the necessary amount of soda and precipitated again with hydrochloric acid by acidification to a Congo acid reaction. The coupling takes place slowly, but it can be accelerated by heating and adding sodium acetate.

   After the formation of the dye has ended, the product is made Congo neutral with soda solution, filtered and dried. The dye, a dark red powder, dissolves in water with a bluish red, in concentrated sulfuric acid it dissolves red-violet and dyes wool from an acid bath in bluish red, lightfast shades.

Claims (1)

PATENTANSPRUCH; Verfahren zur Darstellung eines sauren Disazofarbstoffes; dadurch gekennzeichnet, dass man 4,4'-Diaminodiphenylsulfon tetrazo- tiert und die Tetrazoverbindung mit 2 Mol 2-Amino - 8 - oxynaphthalin - 6 - sulfonsäure in saurer Lösung kuppelt. PATENT CLAIM; Process for the preparation of an acidic disazo dye; characterized in that 4,4'-diaminodiphenyl sulfone is tetrazo- tated and the tetrazo compound is coupled with 2 moles of 2-amino-8-oxynaphthalene-6-sulfonic acid in acidic solution. Der neue Farbstoff stellt nach .dem Trock nen ein dunkelrotes Pulver dar, das sich in Wasser mit blaustichig roter, in konzentrier ter Schwefelsäure mit rotvioletter Färbe löst und Wolle aus saurem Bade in blaustichig roten, lichtechten Tönen färbt. After drying, the new dye is a dark red powder that dissolves in water with a bluish red dye, in concentrated sulfuric acid with a reddish violet dye and dyes wool from an acid bath in bluish red, lightfast shades.
CH226842D 1941-07-29 1941-07-29 Process for the preparation of an acidic disazo dye. CH226842A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH226842T 1941-07-29
CH223541T 1941-07-29

Publications (1)

Publication Number Publication Date
CH226842A true CH226842A (en) 1943-04-30

Family

ID=25726718

Family Applications (1)

Application Number Title Priority Date Filing Date
CH226842D CH226842A (en) 1941-07-29 1941-07-29 Process for the preparation of an acidic disazo dye.

Country Status (1)

Country Link
CH (1) CH226842A (en)

Similar Documents

Publication Publication Date Title
CH238459A (en) Process for the preparation of a copper-compatible polyazo dye.
CH226842A (en) Process for the preparation of an acidic disazo dye.
CH226844A (en) Process for the preparation of an acidic disazo dye.
CH226843A (en) Process for the preparation of an acidic disazo dye.
CH226846A (en) Process for the preparation of an acidic disazo dye.
CH226845A (en) Process for the preparation of an acidic disazo dye.
CH226840A (en) Process for the preparation of an acidic disazo dye.
CH226841A (en) Process for the preparation of an acidic disazo dye.
CH223541A (en) Process for the preparation of an acidic disazo dye.
CH211847A (en) Process for the preparation of an azo dye.
CH222692A (en) Process for the preparation of a monoazo dye.
CH180582A (en) Process for the production of a new dye.
CH252280A (en) Process for the preparation of an azo dye.
CH222693A (en) Process for the preparation of a monoazo dye.
CH148360A (en) Process for the preparation of an azo dye.
CH243001A (en) Process for the preparation of a copper-compatible polyazo dye.
CH218816A (en) Process for the preparation of a disazo dye.
CH209514A (en) Process for the preparation of a disazo dye.
CH265416A (en) Process for the preparation of a stilbene dye.
CH218814A (en) Process for the preparation of a disazo dye.
CH211844A (en) Process for the preparation of an azo dye.
CH179677A (en) Process for the preparation of a monoazo dye.
CH218813A (en) Process for the preparation of a disazo dye.
CH223709A (en) Process for the production of a new azo dye.
CH252278A (en) Process for the preparation of an azo dye.