CH152773A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH152773A
CH152773A CH152773DA CH152773A CH 152773 A CH152773 A CH 152773A CH 152773D A CH152773D A CH 152773DA CH 152773 A CH152773 A CH 152773A
Authority
CH
Switzerland
Prior art keywords
preparation
monoazo dye
dye
monoazo
diazotized
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 CH152773A publication Critical patent/CH152773A/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
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid

Landscapes

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 150616.    Verfahren     zur    Darstellung eines     Monoazofarbstoifes.       Durch das     DR.P.    305522 ist ein Verfahren  zur Darstellung von     Monoazofarbstoffen    ge  schützt, darin bestehend, dass man die durch  Kuppeln von     4-Nitro-l-aminoberizol-2-sulfalkyl-,          aryl-    oder     aralkyl-amiden    erhaltenen     DTono-          azofarbstoffe    mit alkalischen Reduktionsmit  teln behandelt.  



  Es wurde nun gefunden, dass man zu  einem wertvollen     Azofarbstoff    gelangt, wenn  man     5-Acetylamino-l-amiriobenzol=2-snlf-          äthylanilid        diazotiert    und mit     2-Methylamino-          8-naphthol-6-sulfosäure    kuppelt.  



  <I>Beispiel:</I>  333 Gewichtsteile     5-Acetylamino-l-amino-          benzol-2-sulfäthylanilid    (Schmelzpunkt 129 bis  130,5  ) werden mit 69 Gewichtsteilen Na-         triumnitrit    und Salzsäure     diazotiert    und essig  sauer mit 253 Gewichtsteilen     2-Methylamino-          8-naphthol-6-sulfosäure    gekuppelt.  



  Der Farbstoff ist ein dunkelrotes Pulver,  das Wolle aus saurem Bade     bordo    färbt.



      Additional patent to main patent no. 150616. Process for the preparation of a monoazo dye. Through the DR.P. 305522 is a method for the preparation of monoazo dyes ge, consisting in treating the DTonozo dyes obtained by coupling 4-nitro-1-aminoberizole-2-sulfalkyl, aryl or aralkyl amides with alkaline reducing agents.



  It has now been found that a valuable azo dye is obtained if 5-acetylamino-1-amiriobenzene = 2-snlf-ethylanilide is diazotized and coupled with 2-methylamino-8-naphthol-6-sulfonic acid.



  <I> Example: </I> 333 parts by weight of 5-acetylamino-1-aminobenzene-2-sulfethylanilide (melting point 129 to 130.5) are diazotized with 69 parts by weight of sodium nitrite and hydrochloric acid and acetic acid with 253 parts by weight of 2- Methylamino-8-naphthol-6-sulfonic acid coupled.



  The dye is a dark red powder that dyes wool from acid bath bordo.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Monoazo- farbstoffes, dadurch gekennzeichnet, dass man 5-Acetylarnino-l-aminobenzol-2-sulfäthylanilid diazotiert, und mit 2-Methylamino-8-naphthol- 6-sulfosäure kuppelt. Der Farbstoff ist ein dunkelrotes Pulver, das Wolle aus saurem Bade bordo färbt. PATENT CLAIM: Process for the preparation of a monoazo dye, characterized in that 5-acetylamino-1-aminobenzene-2-sulfethylanilide is diazotized and coupled with 2-methylamino-8-naphthol-6-sulfonic acid. The dye is a dark red powder that dyes wool from acid bath bordo.
CH152773D 1931-09-08 1931-09-08 Process for the preparation of a monoazo dye. CH152773A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH152773T 1931-09-08
CH150616T 1931-09-08

Publications (1)

Publication Number Publication Date
CH152773A true CH152773A (en) 1932-02-15

Family

ID=25715675

Family Applications (1)

Application Number Title Priority Date Filing Date
CH152773D CH152773A (en) 1931-09-08 1931-09-08 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH152773A (en)

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