CH311496A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH311496A
CH311496A CH311496DA CH311496A CH 311496 A CH311496 A CH 311496A CH 311496D A CH311496D A CH 311496DA CH 311496 A CH311496 A CH 311496A
Authority
CH
Switzerland
Prior art keywords
disazo dye
parts
red
preparation
water
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH311496A publication Critical patent/CH311496A/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
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/28—Disazo dyes characterised by the tetrazo component the tetrazo component containing two aryl nuclei linked by at least one of the groups —CON<, —SO2N<, —SO2—, or —SO2—O—

Landscapes

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 309566.    Verfahren zur Herstellung eines     Disazofarbstoffes.       Es wurde gefunden, dass man zu einem  wertvollen     Disazofarbstoff    gelangt, wenn man       tetrazotiertes    4,4' -     Diamino    -     diphenylsulfon     beidseitig mit     2-Aminonaphthalin-3,6-disulfon-          säure    vereinigt.  



  Der neue     Disazofarbstoff    bildet ein rotes  Pulver, das sieh in Wasser mit     rotoranger     Farbe löst und das Wolle aus saurem Bade  in besonders lichtechten, rotorangen Tönen  färbt.  



  Über die Herstellung der zu verwenden  den     Tetrazoverbindungen    und über die Kupp  lungsbedingungen gibt das Hauptpatent Aus  kunft.  



  <I>Beispiel:</I>  6,2 Teile     4,4'-Diaminodiphenylsulfon    wer  den in 75 Teilen Wasser suspendiert     und     durch Zugabe von 25     Volumteilen        30o/oiger     Salzsäure gelöst und hierauf in einigen Sekun  den bei 0 bis 10  mit 12,5     Volumteilen        4n-Na-          triumnitritlösung        tetrazotiert.    15,2 Teile     2-          Aminonaphthälin-3,6-disulfonsäure    werden als       Dinatriumsalz    in 400 Teilen Wasser gelöst,

    worauf noch 100     Volumteile        4n-Natriumace-          tatlösung    und 5 Teile Essigsäure zugegeben    werden. Man lässt nun obige     Tetrazolösung     in einer halben Stunde zu dieser Lösung bei  20 bis 25  unter Rühren zufliessen. Nach 16  Stunden wird der orange Farbstoff     abfil-          triert,    in 300 Teilen siedendem Wasser gelöst  und bei 40  durch Zusatz von 160     Volumtei-          len    gesättigter     Natriumchloridlösung    wieder  ausgefällt und     abfiltriert.  



      Additional patent to main patent No. 309566. Process for the production of a disazo dye. It has been found that a valuable disazo dye is obtained if tetrazotized 4,4'-diamino-diphenylsulfone is combined on both sides with 2-aminonaphthalene-3,6-disulfonic acid.



  The new disazo dye forms a red powder, which dissolves in water with a red-orange color and dyes the wool from an acid bath in particularly lightfast, red-orange tones.



  The main patent provides information about the manufacture of the tetrazo compounds to be used and the coupling conditions.



  <I> Example: </I> 6.2 parts of 4,4'-diaminodiphenylsulfone are suspended in 75 parts of water and dissolved by adding 25 parts by volume of 30% hydrochloric acid and then in a few seconds at 0 to 10 with 12, 5 parts by volume of 4N sodium nitrite solution tetrazotized. 15.2 parts of 2-aminonaphthalene-3,6-disulfonic acid are dissolved as the disodium salt in 400 parts of water,

    whereupon 100 parts by volume of 4N sodium acetate solution and 5 parts of acetic acid are added. The above tetrazole solution is now allowed to flow into this solution at 20 to 25 in the course of half an hour while stirring. After 16 hours, the orange dyestuff is filtered off, dissolved in 300 parts of boiling water and, at 40, precipitated again by adding 160 parts by volume of saturated sodium chloride solution and filtered off.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes 4,4' - Diamino - diphenylsulfon beidseitig mit 2-Aminonaphthalin-3,6-disul- fonsäure vereinigt. Der neue Disazofarbstoff bildet ein rotes Pulver, das sich in Wasser mit rotoranger Farbe löst und das Wolle aus saurem Bade in besonders lichtechten, rotorangen Tönen färbt. PATENT CLAIM: A process for the production of a disazo dye, characterized in that tetrazotized 4,4'-diamino-diphenylsulfone is combined on both sides with 2-aminonaphthalene-3,6-disulfonic acid. The new disazo dye forms a red powder that dissolves in water with a red-orange color and dyes the wool from an acid bath in particularly lightfast, red-orange shades. UNTERANSPRUCH: Verfahren gemäss Patentanspruch, da durch gekennzeichnet, dass die Kupplung in saurem Medium vorgenommen wird. SUBClaim: Method according to claim, characterized in that the coupling is carried out in an acidic medium.
CH311496D 1952-12-16 1952-12-16 Process for the preparation of a disazo dye. CH311496A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH311496T 1952-12-16
CH309566T 1952-12-16

Publications (1)

Publication Number Publication Date
CH311496A true CH311496A (en) 1955-11-30

Family

ID=25735607

Family Applications (1)

Application Number Title Priority Date Filing Date
CH311496D CH311496A (en) 1952-12-16 1952-12-16 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH311496A (en)

Similar Documents

Publication Publication Date Title
CH311496A (en) Process for the preparation of a disazo dye.
CH311497A (en) Process for the preparation of a disazo dye.
CH311498A (en) Process for the preparation of a disazo dye.
CH311499A (en) Process for the preparation of a disazo dye.
CH220748A (en) Process for the preparation of a new pyrazolone derivative.
CH229360A (en) Process for the preparation of a trisazo dye.
CH229356A (en) Process for the preparation of a trisazo dye.
CH167032A (en) Process for the production of a new azo dye.
CH302028A (en) Process for the preparation of a trisazo dye.
CH261066A (en) Process for the preparation of a polyazo dye.
CH229358A (en) Process for the preparation of a trisazo dye.
CH147694A (en) Process for the production of a new metal-containing dye.
CH162636A (en) Process for the production of a new chromium-containing dye.
CH241145A (en) Process for the preparation of a new disazo dye.
CH224119A (en) Process for the preparation of a new pyrazolone derivative.
CH296539A (en) Process for the preparation of a trisazo dye.
CH302027A (en) Process for the preparation of a trisazo dye.
CH237130A (en) Process for the production of a new azo dye.
CH238518A (en) Process for the production of a new azo dye.
CH202747A (en) Process for the preparation of an azo dye.
CH311495A (en) Process for the preparation of a disazo dye.
CH202743A (en) Process for the preparation of an azo dye.
CH268077A (en) Process for the preparation of an azo dye.
CH234948A (en) Process for the production of a new azo dye.
CH296538A (en) Process for the preparation of a trisazo dye.