CH220751A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH220751A
CH220751A CH220751DA CH220751A CH 220751 A CH220751 A CH 220751A CH 220751D A CH220751D A CH 220751DA CH 220751 A CH220751 A CH 220751A
Authority
CH
Switzerland
Prior art keywords
azo dye
production
new azo
new
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH220751A publication Critical patent/CH220751A/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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/02—Disazo dyes
    • C09B33/12—Disazo dyes in which the coupling component is a heterocyclic compound

Landscapes

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

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man 1     Mol    der       Diphenyl    - 4', 4 "-     di    - (3 -     methyl    - 5 -     pyrazolon)-          2',2"-disulfonsäure    mit 2     Mol    der     Diazover-          bindung    des 1-     Amino    - 4-     chlorbenzols    ver  einigt.  



  Der neue     Farbstoff    stellt ein gelbes Pul  ver dar, das Wolle aus saurem Bade in  reinen gelben Tönen von bemerkenswerter  Waschechtheit färbt.  



  Die     Diphenyl-4',4"-di-(3-methyl-5-pyrazo-          lon)-2',2"-disulfonsäure    kann erhalten werden  durch     Tetrazotieren    der     4,4'-Diaminodiphenyl-          2,2'-disulfonsäure,    Reduzieren der     Tetrazo-          verbindung    mit     Natriumbisulfit,    Verseifen der  so erhältlichen     Hydrazin-N-sulfonsäure    zum       Dihydrazin    und Kondensieren desselben mit  2     Mol        Acetessigester.     



  <I>Beispiel:</I>  Man löst 12,7     Teile        1-Amino-4-chlorben-          zol    in 90 Teilen     Salzsäure    von 10'/o, kühlt  durch Zufügen von Eis auf 0<B>1</B> und     diazotiert       mit einer Lösung von 7 Teilen     Natriumnitrit     in 30 Teilen Wasser.

   Diese     Diazolösung     giesst man in eine mit Eis     gekühlte    Lösung;  von 25,3 Teilen     Diphenyl-4',4"-di-(3-methyl-          5-pyrazolon)-2',2"-disulfonsäure,    in 200 Teilen  Wasser und 18 Teilen     Natriumcarbonat.    Nach       beendigter    Kupplung wird der     Farbstoff    aus  gesalzen,     filtriert    und     getrocknet.            GESELLSCHAFT    FÜR  CHEMISCHE INDUSTRIE IN BASEL.



  Process for the production of a new azo dye. It has been found that a new azo dye is obtained if 1 mole of the diphenyl - 4 ', 4 "- di - (3 - methyl - 5 - pyrazolone) - 2', 2" -disulfonic acid is mixed with 2 moles of the diazo compound of 1-amino-4-chlorobenzene united.



  The new dye is a yellow powder that dyes wool from an acid bath in pure yellow shades of remarkable washfastness.



  The diphenyl-4 ', 4 "-di (3-methyl-5-pyrazolone) -2', 2" -disulfonic acid can be obtained by tetrazotizing the 4,4'-diaminodiphenyl-2,2'-disulfonic acid, Reduction of the tetrazo compound with sodium bisulfite, saponification of the hydrazine-N-sulfonic acid obtainable in this way to form dihydrazine and condensation of the same with 2 mol of acetoacetic ester.



  <I> Example: </I> 12.7 parts of 1-amino-4-chlorobenzene are dissolved in 90 parts of 10% hydrochloric acid, and the mixture is cooled to 0 <B> 1 </B> by adding ice diazotized with a solution of 7 parts of sodium nitrite in 30 parts of water.

   This diazo solution is poured into a solution cooled with ice; of 25.3 parts of diphenyl-4 ', 4 "-di (3-methyl-5-pyrazolone) -2', 2" -disulfonic acid, in 200 parts of water and 18 parts of sodium carbonate. After coupling is complete, the dye is salted out, filtered and dried. SOCIETY FOR CHEMICAL INDUSTRY IN BASEL.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man 1 Mol der Diphenyl-4',4"-di-(3-methyl- 5-pyrazolon)-2',2"-disulfonsäure mit 2 Mol der Diazoverbindung des 1-Amino-4-ohlorbenzols vereinigt. Der neue Farbstoff stellt ein gelbes Pul ver dar, das Wolle aus saurem Bade in reinen gelben Tönen von bemerkenswerter Wasch echtheit färbt. Claim: A process for the preparation of a new azo dye, characterized in that 1 mol of diphenyl-4 ', 4 "-di (3-methyl-5-pyrazolone) -2', 2" -disulfonic acid is mixed with 2 mol of the diazo compound des 1-Amino-4-chlorobenzene combined. The new dye is a yellow powder that dyes wool from an acid bath in pure yellow shades that are remarkably fast to wash.
CH220751D 1941-03-29 1941-03-29 Process for the production of a new azo dye. CH220751A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH220751T 1941-03-29

Publications (1)

Publication Number Publication Date
CH220751A true CH220751A (en) 1942-04-30

Family

ID=4451821

Family Applications (1)

Application Number Title Priority Date Filing Date
CH220751D CH220751A (en) 1941-03-29 1941-03-29 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH220751A (en)

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