CH198054A - Process for the preparation of a polyazo dye. - Google Patents

Process for the preparation of a polyazo dye.

Info

Publication number
CH198054A
CH198054A CH198054DA CH198054A CH 198054 A CH198054 A CH 198054A CH 198054D A CH198054D A CH 198054DA CH 198054 A CH198054 A CH 198054A
Authority
CH
Switzerland
Prior art keywords
molecule
disulfonic acid
preparation
dye
combined
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals 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 Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH198054A publication Critical patent/CH198054A/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
    • C09B35/38—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

  

  Zusatzpatent zum-     Hauptpatent    Nr. 194457.    Verfahren zur Darstellung eines     Polyazofarbstoffes.       Das vorliegende Patent betrifft ein Ver  fahren zur Darstellung eines blauen     Trisazo-          farbstoffes    und ist dadurch gekennzeichnet,  dass man ein Molekül     Tetrazobenzidin    in  saurer Lösung mit einem Molekül     1,8-Amino-          naphtol-3,6-disulfonsäure    kombiniert, das Zwi  schenprodukt zuerst mit einem     Molekül        Di-          azobenzol-2,5-disulfonsäure    in :

  alkalischer Lö  sung kuppelt und hierauf mit einem Molekül       N-Paratoluolsulfoyl-1,8-aminonaphtol-3,6-di-          sulfonsäure    vereinigt.  



  <I>Beispiel:</I>  18,4 Teile     Benzidin    werden in der übli  chen Weise     tetrazotiert    und mit 34,1 Teilen       1,8-Aminonaphtol-3,6-disulfonsäure    (Monoaa  triumsalz) mineralsauer gekuppelt. Ist die  Bildung des Zwischenproduktes beendet, so  wird es mit der     Diazoverbindung    aus 25,2  Teilen     Aminobenzol-2,5-disulfonsäure    Soda  alkalisch vereinigt. Nach erfolgter Kupplung  zum     Disazofarbstoff    lässt man eine alkalische  Lösung von 47,3 Teilen     N-Parätoluolsulfoyl-          1,8-aminonaphtol-3,6-disulfonsäure    zufliessen.

    Die Kupplung erfolgt rasch und der Farb  stoff wird durch     Aussalzen    der angesäuerten  Kupplungsflüssigkeit     ausgeschieden.    Die nach    der Filtration erhaltene saure     Farbstoffpaste     wird neutralisiert und zur Trockne verdampft.  



  Der neue- Farbstoff stellt ein grauschwar  zes, etwas bronzierendes, in Wasser mit tief  blauer Farbe lösliches Pulver dar und färbt  Leder verschiedenster     Gerbungsart    in schönen  blauen Tönen an.



  Additional patent to the main patent No. 194457. Process for the preparation of a polyazo dye. The present patent relates to a process for the preparation of a blue trisazo dye and is characterized in that one molecule of tetrazobenzidine in acidic solution is combined with one molecule of 1,8-amino-naphthol-3,6-disulfonic acid, the intermediate product first one molecule of diazobenzene-2,5-disulfonic acid in:

  alkaline solution and then combined with a molecule of N-paratoluenesulfoyl-1,8-aminonaphthol-3,6-disulfonic acid.



  <I> Example: </I> 18.4 parts of benzidine are tetrazotized in the usual way and coupled with 34.1 parts of 1,8-aminonaphthol-3,6-disulfonic acid (monoa trium salt) mineral acid. When the formation of the intermediate has ended, it is combined in an alkaline manner with the diazo compound from 25.2 parts of aminobenzene-2,5-disulfonic acid soda. After coupling to the disazo dye, an alkaline solution of 47.3 parts of N-parätoluenesulfoyl-1,8-aminonaphthol-3,6-disulfonic acid is allowed to flow in.

    The coupling takes place quickly and the dye is eliminated by salting out the acidified coupling fluid. The acidic dye paste obtained after filtration is neutralized and evaporated to dryness.



  The new dye is a gray-black, somewhat bronzing powder that is soluble in water with a deep blue color and dyes leather of various types of tanning in beautiful blue tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines blauen Trisazofarbstoffes, dadurch gekennzeichnet, dass man ein Molekül Tetrazobenzidin in sau rer Lösung mit einem Molekül 1,8-Amino- naphtol-3,6-disulfonsäure kombiniert, das Zwi schenprodukt zuerst mit einem Molekül Di- azobenzol-2,5-disulfonsäure in alkalischer Lö sung kuppelt und hierauf mit einem Molekül N-Paratoluolsulfoyl-1;8-aminonaphtol-3,6-di- sulfonsäure vereinigt. PATENT CLAIM: Process for the preparation of a blue trisazo dye, characterized in that one molecule of tetrazobenzidine in acidic solution is combined with one molecule of 1,8-amino-naphthol-3,6-disulfonic acid, the intermediate product first with a molecule of di-azobenzene 2,5-disulfonic acid couples in alkaline solution and then combined with a molecule of N-paratoluenesulfoyl-1; 8-aminonaphthol-3,6-disulfonic acid. Der neue Farbstoff stellt ein grauschwar zes, etwas bronzierendes, in Wasser mit tief blauer Farbe lösliches Pulver dar und färbt Leder verschiedenster Gerbungsart in schönen blauen Tönen an. The new dye is a gray-black, somewhat bronzing powder that is soluble in water with a deep blue color and colors leather of various types of tanning in beautiful blue tones.
CH198054D 1937-03-13 1937-03-13 Process for the preparation of a polyazo dye. CH198054A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH198054T 1937-03-13
US1170174XA 1955-09-14 1955-09-14

Publications (1)

Publication Number Publication Date
CH198054A true CH198054A (en) 1938-05-31

Family

ID=25723053

Family Applications (1)

Application Number Title Priority Date Filing Date
CH198054D CH198054A (en) 1937-03-13 1937-03-13 Process for the preparation of a polyazo dye.

Country Status (1)

Country Link
CH (1) CH198054A (en)

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