CH220124A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH220124A
CH220124A CH220124DA CH220124A CH 220124 A CH220124 A CH 220124A CH 220124D A CH220124D A CH 220124DA CH 220124 A CH220124 A CH 220124A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
amino
nitrobenzene
dichloro
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 CH220124A publication Critical patent/CH220124A/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     Azofarbstoffes.       Gegenstand des Hauptpatentes ist ein Ver  fahren zur Herstellung eines     Azofarbstoffes,     gemäss welchem man     2,6-Dichlor-l-amino-4-          nitrobenzol        diazotiert    und mit     3-(3'-Chlor-          phenylamino-)butanol-(1)    kuppelt.  



  Es wurde nun gefunden, dass man einen  ebenfalls sehr wertvollen     Azofarbstoff    dann  erhält, wenn man     2,6-Dichlor-l-amino-4-nitro-          benzol        diazotiert    und mit     3-(N-Äthyl-phenyl-          amino-)butanol-(1)    kuppelt.  



       Beispiel:     Man bereitet eine     Diazolösung,    indem man  bei     25-301    20,7 Teile     2,6-Dichlor-l-amino-          4-nitrobenzol    in durch Eintragen von 7 Teilen       Natriumnitrit    in 130 Teile     konz.    Schwefelsäure  bereitete     Nitrosylschwefelsäure    einrührt und  die Masse hierauf durch Eingiessen auf Eis  stark     verdiinnt.    Die filtrierte schwefelsaure       Diazolösung    läuft unter Rühren in eine kalte    Lösung von 19,3 Teilen     3-(N-Äthyl-phenyl-          amino-)butanol-(1)

      (erhalten durch Kondensa  tion von     3-Chlorbutanol    mit     Äthylanilin)    in  12 Teile Salzsäure von     231        B6    und 800 Teile  Wasser; man stumpft zur     Beendigung    der  Kupplung mit     Natriumacetat    ab. Der Farb  stoff wird abgesaugt, nachgewaschen und ge  trocknet; er färbt     Acetatseide    sehr lichtecht       orangebraun.  



  Process for the preparation of an azo dye. The main patent relates to a process for the production of an azo dye, according to which 2,6-dichloro-1-amino-4-nitrobenzene is diazotized and coupled with 3- (3'-chlorophenylamino) butanol- (1).



  It has now been found that an also very valuable azo dye is obtained if 2,6-dichloro-1-amino-4-nitrobenzene is diazotized and treated with 3- (N-ethyl-phenylamino) butanol ( 1) couples.



       Example: A diazo solution is prepared by adding 20.7 parts of 2,6-dichloro-1-amino-4-nitrobenzene to 130 parts of conc. Sulfuric acid, stirred in nitrosylsulfuric acid, and the mass is then strongly diluted by pouring onto ice. The filtered sulfuric acid diazo solution runs into a cold solution of 19.3 parts of 3- (N-ethyl-phenyl-amino-) butanol- (1) while stirring

      (Obtained by condensation of 3-chlorobutanol with ethylaniline) in 12 parts of hydrochloric acid of 231 B6 and 800 parts of water; to end the coupling, it is blunted with sodium acetate. The dye is vacuumed off, washed and dried; it dyes acetate silk very lightfast orange-brown.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 2,6- Dichlor-l-amino-4-nitrobenzol diazotiert und mit 3-(N-Äthyl-phenylamino-)butanol-(1); kup pelt. Der erhaltene Farbstoff färbt Acetat seide sehr lichtecht in orangebraunen Tönen. PATENT CLAIM: Process for the production of an azo dye, characterized in that 2,6-dichloro-1-amino-4-nitrobenzene is diazotized and 3- (N-ethylphenylamino) butanol- (1); coupling. The dye obtained dyes acetate silk very lightfast in orange-brown tones.
CH220124D 1939-05-03 1940-04-09 Process for the preparation of an azo dye. CH220124A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE220124X 1939-05-03
CH216417T 1940-04-09

Publications (1)

Publication Number Publication Date
CH220124A true CH220124A (en) 1942-03-15

Family

ID=25725846

Family Applications (1)

Application Number Title Priority Date Filing Date
CH220124D CH220124A (en) 1939-05-03 1940-04-09 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH220124A (en)

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