CH144490A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH144490A
CH144490A CH144490DA CH144490A CH 144490 A CH144490 A CH 144490A CH 144490D A CH144490D A CH 144490DA CH 144490 A CH144490 A CH 144490A
Authority
CH
Switzerland
Prior art keywords
sulfonic acid
disazo dye
preparation
dye
amino
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 CH144490A publication Critical patent/CH144490A/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
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/08—Disazo dyes from a coupling component "C" containing directive hydroxyl and amino groups

Landscapes

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 142444.    Verfahren zur Herstellung eines     Disazofarbstoffes.       Es wurde     gefunden,    dass man einen neuen       Disazofarbstoff    erhält, wenn man     2-Amino-          naphthalin-5-sulfosäure        diazotiert,    mit     1-          Amino-2-äthoxynaphthalin-6-sulfosäure    ver  einigt, den erhaltenen     Monoazofarbstoff          diazotiert    und mit     2-Phenylamino-5-oxy-          naphthalin-7-sulfosäure    kuppelt.  



  Der neue     Disazofarbstoff    färbt Baum  wolle und die Kunstseiden aus regenerierter  Zellulose, insbesondere     Viskosekunstseide,    in       grünstichig    blauen Tönen.  



       Beispiel:     Die aus 23,3 Teilen     2-Aminonaphthalin-          5-sulfosäure    bereitete     Diazolösung    wird bis  zum Verschwinden der mineralsauren Reak  tion mit     Natriumacetat    versetzt und mit  einer neutralen Lösung von 26,7 Teilen     1-          Amino-2-äthoxynaphthalin-6-sulfosäure    ver  einigt.

   Der gebildete     Monoazofarbstoff        wird     mit 6,9 Teilen     Natriumnitrit    und der nöti  gen Menge     Salzsäure    bei<B>10'</B> weiter     diazo-          tiert    und die     Diazolösung    mit einer sodaalka-    Zischen Lösung von 31,5 Teilen     2-Phenyl-          amino    - 5 -     oxynaphthalin    - 7 -     sulfosäure    ver  einigt. Nach beendeter Kupplung wird der  Farbstoff     ausgesalzen    und filtriert.

   Die  zweite Kupplung kann auch in Gegenwart  von     Pyridin        durchgeführt    werden.



      Additional patent to main patent no. 142444. Process for the preparation of a disazo dye. It has been found that a new disazo dye is obtained if 2-amino-naphthalene-5-sulfonic acid is diazotized, combined with 1-amino-2-ethoxynaphthalene-6-sulfonic acid, the monoazo dye obtained is diazotized and 2-phenylamino-5 -oxynaphthalene-7-sulfonic acid couples.



  The new disazo dye dyes cotton and artificial silk from regenerated cellulose, especially viscose artificial silk, in greenish blue tones.



       Example: The diazo solution prepared from 23.3 parts of 2-aminonaphthalene-5-sulfonic acid is treated with sodium acetate until the mineral acidic reac tion disappears and a neutral solution of 26.7 parts of 1-amino-2-ethoxynaphthalene-6-sulfonic acid ver agree.

   The monoazo dye formed is further diazo- tated with 6.9 parts of sodium nitrite and the necessary amount of hydrochloric acid at <B> 10 '</B> and the diazo solution with a soda-alkali solution of 31.5 parts of 2-phenylamino - 5 - oxynaphthalene - 7 - sulfonic acid combined. When the coupling is complete, the dye is salted out and filtered.

   The second coupling can also be carried out in the presence of pyridine.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Disazofarbstoffes, dadurch gekennzeichnet, dass man 2-Aminonaphthalin-5-sulfosäure diazotiert, mit 1-Amino-2-äthoxynaphthalin-6- sulfosäure vereinigt, den erhaltenen Mono- a.zofarbstoff diazotiert und mit 2-Phenyl- amino-5-oxynaphthalin-7-sulfosäure kuppelt. Claim: Process for the preparation of a new disazo dye, characterized in that 2-aminonaphthalene-5-sulfonic acid is diazotized, combined with 1-amino-2-ethoxynaphthalene-6-sulfonic acid, the resulting mono-a.zo dye is diazotized and with 2-phenyl - amino-5-oxynaphthalene-7-sulfonic acid couples. Der neue Disazofarbstoff färbt Baumwolle und die Kunstseiden aus regenerierter Zellu lose, insbesondere Viskosekunstseide, in grün stichig blauen Tönen. The new disazo dye dyes cotton and artificial silk from regenerated cellulose, especially viscose artificial silk, in green, blue tones.
CH144490D 1929-02-02 1929-02-02 Process for the preparation of a disazo dye. CH144490A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH142444T 1929-02-02
CH144490T 1929-02-02

Publications (1)

Publication Number Publication Date
CH144490A true CH144490A (en) 1930-12-31

Family

ID=25714048

Family Applications (1)

Application Number Title Priority Date Filing Date
CH144490D CH144490A (en) 1929-02-02 1929-02-02 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH144490A (en)

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