CH198058A - Process for the preparation of a polyazo dye. - Google Patents

Process for the preparation of a polyazo dye.

Info

Publication number
CH198058A
CH198058A CH198058DA CH198058A CH 198058 A CH198058 A CH 198058A CH 198058D A CH198058D A CH 198058DA CH 198058 A CH198058 A CH 198058A
Authority
CH
Switzerland
Prior art keywords
molecule
dye
preparation
combined
acid
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 CH198058A publication Critical patent/CH198058A/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     Polyazo-          farbstoffes    und ist dadurch gekennzeichnet,  dass man ein Molekül     Tetrazobenzidin    in  saurer Lösung mit einem Molekül     1,8-Amino-          naphthol    - 3,6 - dis     ulfonsäure    kombiniert, das  Zwischenprodukt mit einem Molekül     Diazo-          benzolparasulfonsäure    in     -alkalischer    Lösung  kuppelt,

   hierauf mit einem Molekül     1,8-          Aminonaphtol    - 3,6 -     disulfonsäure    alkalisch  vereinigt und. den erhaltenen Farbstoff mit       Phosgengas    behandelt.    <I>Beispiel:</I>    18,4 Teile     Benzidin    werden in der üblichen  Weise     tetrazotiert    und mit 34,1 Teilen 1,8       Aminonaphtol.3,6.disulforrsäure(Mononatrium-          salz)    mineralsauer gekuppelt.

   Ist die Bildung  des     Zwischenproduktes    beendet, so wird es mit  der     Diazoverbindung    aus 17,3 Teilen     Amino-          benzolpärasulfonsäure        sodaalkalisch    vereinigt.  Zu dem entstandenen     Disazofarbstoff    lässt man  eine     sodaalkalische    Lösung von 31,9 Teilen       1,8-Aminonaphtol-3,6-disulfonsäure    zufliessen.    'Nach erfolgter Kupplung fügt man zu der  Flüssigkeit 5,5 Teile Soda, erwärmt auf<B>700</B>  und leitet bei dieser Temperatur so lange       Phosgengas    durch die Flüssigkeit, bis dieselbe       schwach    sauer reagiert.

   Durch Versetzen der  sauer gewordenen Lösung mit Kochsalz wird  der Farbstoff gefällt; er wird     abgenutscht,     mit etwas Wasser angerührt, reit Soda neutral  gestellt und zur Trockne verdampft.  



  Der neue Farbstoff stellt ein in kaltem  Wasser leicht lösliches, graues,     bronzierendes     Pulver dar. In der Lichtechtheit     übertrifft    er  den nicht mit     Phosgen    behandelten,     rotstichig-          blauen    -Farbstoff; der am Licht stark nach  Grün verschiesst, sehr wesentlich. Er färbt  Leder verschiedenster     Gerbungsart    in schönen  blauen Tönen an.



      Additional patent to main patent No. 194457. Process for the preparation of a polyazo dye. The present patent relates to a method for the preparation of a blue polyazo 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 with a Molecule of diazo-benzenesulfonic acid in alkaline solution couples,

   then combined with a molecule of 1,8-aminonaphthol-3,6-disulfonic acid and alkaline. treated the dye obtained with phosgene gas. <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.disulforric acid (monosodium salt) with mineral acid.

   When the formation of the intermediate product has ended, it is combined with the diazo compound from 17.3 parts of aminobenzene para-sulfonic acid in an alkaline-soda manner. A soda-alkaline solution of 31.9 parts of 1,8-aminonaphthol-3,6-disulfonic acid is allowed to flow into the disazo dye formed. After coupling has taken place, 5.5 parts of soda are added to the liquid, heated to 700 and phosgene gas is passed through the liquid at this temperature until the liquid reacts slightly acidic.

   The dye is precipitated by adding common salt to the acidic solution; it is sucked off, mixed with a little water, made neutral with soda and evaporated to dryness.



  The new dye is a gray, bronzing powder that is easily soluble in cold water. In terms of lightfastness, it exceeds the reddish-blue dye that has not been treated with phosgene; which shoots strongly towards green in the light, very essential. He dyes leather of various types of tanning in beautiful blue tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines blauen Polyazofarbstoffes, dadurch gekennzeichnet, dass man ein Molekül Tetrazobenzidin in saurer Lösung mit einem Molekül 1,8-Amino- näphtol - 3,6 - disulfönsäure kombiniert, das Zwischenprodukt mit einem Molekül Diazo- benzolparasulfonsäure in alkalischer Lösung kuppelt, hierauf mit einem Molekül I,8- Aminonaphtol-3,6-disulfonsäure alkalisch ver einigt und den erhaltenen Farbstoff mit Phosgengas behandelt. PATENT CLAIM: Process for the preparation of a blue polyazo 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 is coupled with a molecule of diazobenzene-parasulfonic acid in alkaline solution , then combined with a molecule of I, 8-aminonaphthol-3,6-disulfonic acid alkaline ver and treated the dye obtained with phosgene gas. Der neue Farbstoff stellt ein in kaltem Wasser leicht lösliches, graues, bronzierendes Pulver dar und färbt Leder verschiedenster Gerbungsart in schönen blauen Tönen an. The new dye is a gray, bronzing powder that is easily soluble in cold water and colors leather of various types of tanning in beautiful blue tones.
CH198058D 1937-03-13 1937-03-13 Process for the preparation of a polyazo dye. CH198058A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH198058T 1937-03-13
US1170174XA 1955-09-14 1955-09-14

Publications (1)

Publication Number Publication Date
CH198058A true CH198058A (en) 1938-05-31

Family

ID=25723057

Family Applications (1)

Application Number Title Priority Date Filing Date
CH198058D CH198058A (en) 1937-03-13 1937-03-13 Process for the preparation of a polyazo dye.

Country Status (1)

Country Link
CH (1) CH198058A (en)

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