CH235456A - Process for the preparation of a water-soluble monoazo dye. - Google Patents

Process for the preparation of a water-soluble monoazo dye.

Info

Publication number
CH235456A
CH235456A CH235456DA CH235456A CH 235456 A CH235456 A CH 235456A CH 235456D A CH235456D A CH 235456DA CH 235456 A CH235456 A CH 235456A
Authority
CH
Switzerland
Prior art keywords
water
preparation
monoazo dye
soluble monoazo
sulfonic acid
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH235456A publication Critical patent/CH235456A/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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
    • C09B29/08—Amino benzenes

Landscapes

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

Description

  

  Verfahren zur Herstellung eines wasserlöslichen     Monoäzofarbstoffes.       Nach dem im Hauptpatent beschriebenen  Verfahren erhält man einen Leder in gelb  braunen Tönen einheitlich durchfärbenden  Farbstoff von guter Licht-, Säure- und  Wasserechtheit, wenn man     1-Amino-2-chlor-          4-nitrobenzol-6-sulfosäure        diazotiert    und die       Diazoverbindung    mit     Phenylaminodi        (äthan-          sulfonsäure    der Formel  
EMI0001.0009     
    kuppelt.

    Wie nun weiter gefunden wurde, erhält  man einen Farbstoff von ähnlichen Eigen  schaften, wenn man     1-Amino-2-chlor-6-nitro-          benzol-4-sulfosäure        diazotiert    und die     Diazo-          verbindung    mit der     Phenylaminodi        (äthan-          sulfonsäure)    kuppelt.  



       Beispiel:     27,5 Teile     1-amino-2-chlor-6-nitrobenzol-          4-sulfonsaures    Natrium werden in 200 Teilen       warmem    Wasser gelöst und unter     Rühren     auf Eis und 50 Teile Salzsäure von 12'B6  gegossen. Bei einer Temperatur von 0-5     giesst man eine     wässrige    Lösung von 7 Teilen       Natriumnitrit    dazu. Die     Diazotierung    ist in  etwa 1/2 Stunde beendet.

   Hierauf giesst man  die     Diazoverbindung    in eine mit Eis ver  setzte,     wässrige    Lösung des     Natriumsälzes     der     Phenylaminodi        (äthansulfonsäure)    und       stumpft    zur     Beendigung    der     Kupplung    mit       Natriumacetat    ab. Der Farbstoff färbt  Leder in braunroten Tönen wasserecht durch.



  Process for the preparation of a water-soluble monoazo dye. The process described in the main patent gives a leather in yellow-brown shades uniformly through-dyed dye of good light, acid and water fastness, if 1-amino-2-chloro-4-nitrobenzene-6-sulfonic acid is diazotized and the diazo compound with phenylaminodi (ethane sulfonic acid of the formula
EMI0001.0009
    clutch.

    As has now been further found, a dye with similar properties is obtained if 1-amino-2-chloro-6-nitrobenzene-4-sulfonic acid is diazotized and the diazo compound is coupled with the phenylamino di (ethane sulfonic acid).



       Example: 27.5 parts of 1-amino-2-chloro-6-nitrobenzene-4-sulfonic acid sodium are dissolved in 200 parts of warm water and poured onto ice and 50 parts of hydrochloric acid of 12'B6 with stirring. At a temperature of 0-5, an aqueous solution of 7 parts of sodium nitrite is poured in. The diazotization is complete in about 1/2 hour.

   The diazo compound is then poured into an aqueous solution of the sodium salt of phenylamino di (ethanesulphonic acid) set with ice and blunted with sodium acetate to terminate the coupling. The dye dyes leather in brown-red tones water-fast.

Claims (1)

PATENTANSPRÜCH: Verfahren zur Herstellung eines wasser löslichen Monoazofarbstoffes, dadurch ge kennzeichnet, dass man 1-Amino-2-cblor-6- nitrobenzol-4-sulfosäure diazotiert und die Diazoverbindung mit Phenylaminodi (äthan- sulfonsäure) der Formel EMI0001.0044 kuppelt. Der neue Farbstoff färbt Leder in braun roten Tönen wasserecht durch. PATENT CLAIM: Process for the preparation of a water-soluble monoazo dye, characterized in that 1-amino-2-chloro-6-nitrobenzene-4-sulfonic acid is diazotized and the diazo compound is diazotized with phenylamino di (ethane sulfonic acid) of the formula EMI0001.0044 clutch. The new dye dyes leather in brown-red tones water-fast.
CH235456D 1939-08-24 1942-12-11 Process for the preparation of a water-soluble monoazo dye. CH235456A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE235456X 1939-08-24
CH232888T 1942-12-11

Publications (1)

Publication Number Publication Date
CH235456A true CH235456A (en) 1944-11-30

Family

ID=25727770

Family Applications (1)

Application Number Title Priority Date Filing Date
CH235456D CH235456A (en) 1939-08-24 1942-12-11 Process for the preparation of a water-soluble monoazo dye.

Country Status (1)

Country Link
CH (1) CH235456A (en)

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