CH151869A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH151869A
CH151869A CH151869DA CH151869A CH 151869 A CH151869 A CH 151869A CH 151869D A CH151869D A CH 151869DA CH 151869 A CH151869 A CH 151869A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
parts
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 CH151869A publication Critical patent/CH151869A/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

  

      Zusat--patent    zum Hauptpatent     Nr-.    149405.    Verfahren zur Darstellung eines     Azofarbstoffes.       Im Hauptpatent ist ein Verfahren zur  Darstellung eines     Azofarbstoffes    angegeben,  bei dem     diazotiertes        p-Nitranilin    mit     Äthyl-          (co-oxäthyl)anilin    gekuppelt wird.  



  Es wurde nun gefunden,     dass    man in ana  loger Weise ebenfalls einen     Azofarbstoff    von  wertvollen Eigenschaften erhält, wenn man       diazotiertes        2.6-Dichlor-4-nitranilin    mit     Me-          thyl-(co-oxäthyl)-anilin    kuppelt.  



  Der erhaltene Farbstoff ist zum Färben  von Lacken geeignet und liefert auf     Acetat-          seide    braune, sehr licht-,     wasser-    und wasch  echte, rein weiss     ätzbare    Färbungen.    <I>Beispiel:</I>  <B>20,7</B> Teile     2.6-Dichlor-4-nitraiiilin    werden  in<B>30</B> Teilen Schwefelsäure von<B><I>660</I></B><I> B6</I> bei  zirka<B>50</B>     11   <B>C</B> gelöst. Die Lösung wird auf<B>5 0 C</B>  abgekühlt Lind mit einer 4,7 Teilen     HN02     entsprechenden Menge     NitrosvIschwefelsäure     versetzt.

   Nachdem die     Diazoierung    beendet  ist,     lässt    man das Gemisch in Eis einlaufen,  worauf man eine Lösung von<B>15,5</B> Teilen       Methyl-(co-oxäthyl)-aniliii,    erhalten zum Bei-    spiel durch Einwirkung von     Glykolchlor-          hydrin    auf     Monomethylanilin,    in 20 Teilen  Eisessig in dünnem Strahl einlaufen     lässt.     Nach kurzer Zeit ist die     Farbstoffbildung     vollendet. Man saugt ab und     wäscht'so    lange  mit Wasser nach, bis das Waschwasser neu  tral reagiert.

   Der Farbstoff wird dann ent  weder in üblicher Weise in eine zum Färben  geeignete     Pastenform    gebracht oder bei zirka  <B>50 " 0</B> getrocknet. Er     lässt    sich aus Alkohol       umkristallisieren.  



      Additional patent for the main patent no. 149405. Process for the preparation of an azo dye. The main patent specifies a process for the preparation of an azo dye in which diazotized p-nitroaniline is coupled with ethyl (co-oxethyl) aniline.



  It has now been found that an azo dye of valuable properties is likewise obtained in an analogous manner if diazotized 2,6-dichloro-4-nitroaniline is coupled with methyl (co-oxethyl) aniline.



  The dye obtained is suitable for dyeing lacquers and, on acetate silk, provides brown, very lightfast, waterfast and washable, pure white etchable dyeings. <I> Example: </I> <B> 20.7 </B> parts of 2,6-dichloro-4-nitraiiilin become <B> <I> 660 </ I in <B> 30 </B> parts of sulfuric acid > </B> <I> B6 </I> solved at around <B> 50 </B> 11 <B> C </B>. The solution is cooled to 5 ° C. and an amount of nitrosulfuric acid corresponding to 4.7 parts of HNO2 is added.

   After the diazoation has ended, the mixture is run into ice, whereupon a solution of 15.5 parts of methyl (co-oxoethyl) aniliii, obtained, for example, by the action of glycol chlorine hydrin on monomethylaniline, poured in 20 parts of glacial acetic acid in a thin stream. The dye formation is complete after a short time. It is suctioned off and rewashed with water until the wash water reacts neutrally.

   The dye is then either brought into a paste form suitable for dyeing in the usual way or dried at about 50 "0. It can be recrystallized from alcohol.

Claims (1)

PATENTANSPRUCII: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man diazotiertes 2.6-Dichlor-4-nitranilin mit Me- thyl-(m-oxäthyl)-anilin kuppelt. Der erhaltene Farbstoff ist zum Färben von Lacken geeignet und liefert auf Aoetat- seide braune, sehr licht-, wasser- und wasch echte, rein weiss ätzbare Färbungen. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that diazotized 2,6-dichloro-4-nitroaniline is coupled with methyl (m-oxäthyl) aniline. The dye obtained is suitable for dyeing lacquers and provides brown, very lightfast, waterfast and washable, pure white etchable dyeings on acetate silk.
CH151869D 1930-08-12 1930-08-12 Process for the preparation of an azo dye. CH151869A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH151869T 1930-08-12
CH149405T 1932-03-26

Publications (1)

Publication Number Publication Date
CH151869A true CH151869A (en) 1931-12-31

Family

ID=25715409

Family Applications (1)

Application Number Title Priority Date Filing Date
CH151869D CH151869A (en) 1930-08-12 1930-08-12 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH151869A (en)

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