CH267871A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH267871A
CH267871A CH267871DA CH267871A CH 267871 A CH267871 A CH 267871A CH 267871D A CH267871D A CH 267871DA CH 267871 A CH267871 A CH 267871A
Authority
CH
Switzerland
Prior art keywords
acid
dye
production
azo dye
new azo
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH267871A publication Critical patent/CH267871A/en

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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
    • C09B35/38—Trisazo dyes ot the type
    • C09B35/44—Trisazo dyes ot the type the component K being a hydroxy amine
    • C09B35/46—Trisazo dyes ot the type the component K being a hydroxy amine the component K being an amino naphthol
    • C09B35/463—D being derived from diaminodiphenyl

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 264602.    verfahren zur Herstellung eines neuen     Azofarbstoffes.       Das vorliegende Patent betrifft ein Ver  fahren zur Herstellung eines neuen     Azofarb-          stoffes    und ist dadurch gekennzeichnet, dass  man die Zwischenverbindung aus     4,4'-Tetrazo-          diphenyl    und 1     Mol        Salicylsäure    mit dem     Ace-          tylaminoazofarbstoff,    den man durch saure  Kupplung von dianotierter     Anilin-2,5-disttl-          fonsäure    mit.

       2,8-Atninonaphthol-6-sulfon-          säure    und nachfolgende     Aeetylierung    erhält,  vereinigt. und das erhaltene Kopplungspro  dukt zwecks     Verseifung    der     Acetylamino-          gruppe    mit     verseifenden        Mitteln    behandelt.  <I>Beispiel:</I>  18,4 Teile     Zenzidin    werden in     bekannter     Weise     tetrazotiert    und mit 13,8 Teilen     Sali-          cylsäure    in alkalischer     Lösung-    zur Zwischen  verbindung vereinigt.

   Zu der     orangebraunen     Suspension derselben lässt     tnan    in Gegenwart  von 20 Teilen     calc.    Soda die wässerige Lösung  von 52 Teilen des     Monoazofarbstoffes,    den man  durch Vereinigung von     diazotierter        Anilin-2,5-          disulfonsäure    mit     2,8-Aminonaphthol-6-sulfoti-          säure    in saurem Medium und nachfolgende       Acet,ylierung    erhält, bei 5 bis 100 zufliessen.  Der entstehende Farbstoff geht mit violett-    brauner Farbe in Lösung. Nach beendeter  Kupplung wird     ausgesalzen,    filtriert und ge  trocknet.

   Der so erhaltene     Trisazofarbstoff,     ein dunkles Pulver, färbt Baumwolle in licht  echten     violettbraunen    Tönen.  



  Durch Verseifen in     l0o/oiger        Sodalösung     bei     90     erhält man den entsprechenden     Amino-          azofarbstoff,    der Baumwolle in     gelbstichig     braunen, schweiss- und säureechten Nuancen  von     -uter        Lichtechtheit.    färbt.



  <B> Additional patent </B> to main patent no. 264602. Process for the production of a new azo dye. The present patent relates to a process for the production of a new azo dye and is characterized in that the intermediate compound of 4,4'-tetrazodiphenyl and 1 mole of salicylic acid with the acetylaminoazo dye, which is obtained by acidic coupling of dianotated aniline -2,5-distl- fonic acid with.

       2,8-Atninonaphthol-6-sulfonic acid and subsequent acetylation obtained, combined. and the coupling product obtained is treated with saponifying agents for the purpose of saponifying the acetylamino group. <I> Example: </I> 18.4 parts of zenzidine are tetrazotized in a known manner and combined with 13.8 parts of salicylic acid in an alkaline solution to form the intermediate compound.

   The orange-brown suspension of the same can be added in the presence of 20 parts of calc. Soda the aqueous solution of 52 parts of the monoazo dye, which is obtained by combining diazotized aniline-2,5-disulfonic acid with 2,8-aminonaphthol-6-sulphonic acid in an acidic medium and subsequent acetylation, at 5 to 100 flow in . The resulting dye goes into solution with a violet-brown color. After the coupling has ended, the mixture is salted out, filtered and dried.

   The trisazo dye obtained in this way, a dark powder, dyes cotton in light, genuine violet-brown shades.



  Saponification in 10% soda solution at 90 gives the corresponding amino azo dye, cotton in yellow-tinged brown, sweat- and acid-fast shades of good lightfastness. colors.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man die Zwischenverbindung aus 4,4'-Tetrazo- cliphettyl und 1 Mol Salieylsäure mit dem Ace- . <B> PATENT CLAIM: </B> Process for the production of a new azo dye, characterized in that the intermediate compound of 4,4'-tetrazo-cliphettyl and 1 mol of salicic acid is mixed with the ace-. tylaminoazofarbstoff, den man durch saure Kupplung von dianotierter Anilin-2,5-disul- fonsäure mit 2,8-Amino tiapltt,hol-6-stilfonsäure und nachfolgende Acetylierung erhält, verei nigt und das erhaltene Kupplungsprodukt zwecks Verseifung der Acetylaminogruppe mit verseifenden Mitteln behandelt. Der neue Farbstoff, ein dunkles Pulver, färbt Baumwolle in gelbstichig braunen Tönen von guter Licht-, Schweiss- und Säureechtheit. tylaminoazo dye, which is obtained by acid coupling of dianotated aniline-2,5-disulphonic acid with 2,8-amino tiapltt, hol-6-stilfonsäure and subsequent acetylation, combined and the coupling product obtained is treated with saponifying agents for the purpose of saponifying the acetylamino group . The new dye, a dark powder, dyes cotton in yellow-tinged brown shades with good light, perspiration and acid fastness.
CH267871D 1947-01-17 1947-01-17 Process for the production of a new azo dye. CH267871A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH267871T 1947-01-17
CH264602T 1947-01-17

Publications (1)

Publication Number Publication Date
CH267871A true CH267871A (en) 1950-04-15

Family

ID=25730753

Family Applications (1)

Application Number Title Priority Date Filing Date
CH267871D CH267871A (en) 1947-01-17 1947-01-17 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH267871A (en)

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