CH267877A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH267877A
CH267877A CH267877DA CH267877A CH 267877 A CH267877 A CH 267877A CH 267877D A CH267877D A CH 267877DA CH 267877 A CH267877 A CH 267877A
Authority
CH
Switzerland
Prior art keywords
mol
dye
azo dye
production
new
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 CH267877A publication Critical patent/CH267877A/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
    • C09B35/50—Tetrazo dyes
    • C09B35/52—Tetrazo dyes of the type

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

      Zusatzpatent    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 2     Mol        4,Diazoehlorbenzol    mit 1     Mol    des       Diacetyldiaminoazofarbstoffes,    den man durch  saure Kupplung von 1     Mol        tetrazotierter        Ben-          zidin-3,3'-disulfonsäure    mit 2     Mol        2,

  8-Amino-          naphthol-6-sulfonsäure    und nachfolgende     Ace-          tylierung    erhält, vereinigt und das erhaltene  Kupplungsprodukt zwecks     Verseifung    der       Acetylaminogruppen    mit verseifenden Mitteln  behandelt.  



  <I>Beispiel:</I>  93 Teile des     Diacetyl-disazofarbstoffes,    den  man durch Vereinigung von 1     Mol        tetrazotier-          ter        Benzidin-3,3'-disulfonsäure    mit 2     Mol        2,8-          Aminonaphthol-6-sulfonsäure    in saurem Me  dium und nachfolgende     Acetylierung    erhält,  werden in 800 Teilen Wasser und 40 Teilen       cale.    Soda gelöst und diese deutlich alkalisch  reagierende Lösung bei 0 bis<B>100</B> mit der eis  kalten     Diazolösung    von 25,

  4 Teilen     4-Chlor-          anilin    vereinigt. Nach beendeter Kupplung  salzt man den erhaltenen     Tetrakisazofarbstoff       aus und filtriert. ab. Zur     Verseifung    der     Ace-          tylaminogruppen    erwärmt man während vier  Stunden in 10     oloiger        Sodalösung    auf 900, salzt  dann aus, filtriert und trocknet.  



  Der neue Farbstoff, ein schwarzes Pulver,  färbt Baumwolle in licht- und waschechten  grauen Tönen.



      Additional patent to main patent No. 264602. Process for the production of a new azo dye. The present patent relates to a process for the preparation of a new azo dye and is characterized in that 2 moles of 4, diazoehlorbenzene with 1 mole of the diacetyldiaminoazo dye, which is obtained by acid coupling of 1 mole of tetrazotized benzidine-3,3'- disulfonic acid with 2 moles of 2,

  8-Amino-naphthol-6-sulfonic acid and subsequent acetylation are obtained, combined and the coupling product obtained is treated with saponifying agents for the purpose of saponifying the acetylamino groups.



  <I> Example: </I> 93 parts of the diacetyl disazo dye obtained by combining 1 mol of tetrazotized benzidine-3,3'-disulfonic acid with 2 mol of 2,8-aminonaphthol-6-sulfonic acid in acidic medium and subsequent acetylation are obtained in 800 parts of water and 40 parts of cale. Soda dissolved and this clearly alkaline solution at 0 to <B> 100 </B> with the ice cold diazo solution of 25,

  4 parts of 4-chloroaniline combined. After the coupling has ended, the tetrakisazo dye obtained is salted out and filtered. from. To saponify the acetylamino groups, the mixture is heated to 900 in an oily soda solution for four hours, then salted, filtered and dried.



  The new dye, a black powder, dyes cotton in lightfast and washfast gray tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man 2 Mol 4-Diazochlorbenzol mit 1 Mol des Diaeetyldiaminoazofarbstoffes, den man durch saure Kupplung von 1 Mol tetrazotierter Ben- zidin-3,3'-disulfonsäure mit 2 Mol. 2,8-Amino- naphthol-6-sulfonsäure und nachfolgende Ace- tylierung erhält, PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that 2 mol of 4-diazochlorobenzene are mixed with 1 mol of the diaetyldiaminoazo dye which is obtained by acidic coupling of 1 mol of tetrazotized benzidine-3,3'-disulfonic acid with 2 mol. 8-amino-naphthol-6-sulfonic acid and subsequent acetylation is obtained, vereinigt und das erhaltene Kupplungsprodukt zwecks Verseifung der Acetylaminogruppen mit verseifenden Mitteln behandelt. Der neue Farbstoff, ein schwarzes Pulver, färbt Baumwolle in licht- und waschechten grauen Tönen. combined and treated the coupling product obtained for the purpose of saponification of the acetylamino groups with saponifying agents. The new dye, a black powder, dyes cotton in lightfast and washfast gray tones.
CH267877D 1947-01-17 1947-01-17 Process for the production of a new azo dye. CH267877A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH264602T 1947-01-17
CH267877T 1947-01-17

Publications (1)

Publication Number Publication Date
CH267877A true CH267877A (en) 1950-04-15

Family

ID=25730759

Family Applications (1)

Application Number Title Priority Date Filing Date
CH267877D CH267877A (en) 1947-01-17 1947-01-17 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH267877A (en)

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