CH211826A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH211826A
CH211826A CH211826DA CH211826A CH 211826 A CH211826 A CH 211826A CH 211826D A CH211826D A CH 211826DA CH 211826 A CH211826 A CH 211826A
Authority
CH
Switzerland
Prior art keywords
azo dye
dye
preparation
diazo
nitrobenzene
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH211826A publication Critical patent/CH211826A/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
    • C09B43/00—Preparation of azo dyes from other azo compounds
    • C09B43/18—Preparation of azo dyes from other azo compounds by acylation of hydroxyl group or of mercapto group
    • C09B43/20—Preparation of azo dyes from other azo compounds by acylation of hydroxyl group or of mercapto group with monocarboxylic acids, carbamic acid esters or halides, mono- isocyanates or haloformic acid esters
    • C09B43/202—Aliphatic, cycloaliphatic, araliphatic carboxylic acids

Description

       

      Zusatzpatent    zum Hauptpatent Nr. 208950.    Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen  wertvollen     Azofarbstoff    erhält,     wenn    man       Methyloxäthylaminobenzol,    die     Diazoverbin-          dung    des     1-Amino-4-nitrobenzols    und     Malein-          säureanhydrid    derart aufeinander einwirken  lässt,

   dass der saure     Maleinsäureester    des     Me-          thyloxäthylaminobenzols    gebildet wird und  der     Diazorest    in     4-Stellung    zur tertiären       Aminogruppe    eintritt.  



  Der so erhaltene Farbstoff bildet ein  dunkles Pulver, das sich in Form eines Al  kalisalzes in Wasser mit roter Farbe löst und       Acetatkunstseide    aus wässriger Lösung in  roten Tönen färbt.         Beispiel:     In die     Diazolösung,    die man aus 139 Tei  len     1-Amino-4-nitrobenzol    herstellt, trägt  man 249 Teile des sauren     Maleinsäureesters     des     Methyloxäthylaminobenzols,    erhalten  durch Umsetzung von     Maleinsäureanhydrid     mit     Methyloxäthylaminobenzol,    der in Form  einer     wässrigen    Lösung eines Ammonium  salzes vorliegt, ein.

   Man führt die Kupplung  durch längeres Rühren zu Ende und kann    auch allenfalls neutralisierende Mittel, wie  z.     B.        Natriumacetat,    zugeben. Der Farbstoff  wird dann     abfiltriert    und etwas     mit    Wasser  gewaschen. Man verrührt ihn dann mit einer       Natriumcbloridlösung    und stellt mit Natrium  carbonat oder mit Ammoniak auf den Neu  tralpunkt.



      Additional patent to main patent no. 208950. Process for the production of an azo dye. It has been found that a new valuable azo dye is obtained if methyloxethylaminobenzene, the diazo compound of 1-amino-4-nitrobenzene and maleic anhydride are allowed to act on one another in such a way that

   that the acidic maleic acid ester of methyloxäthylaminobenzols is formed and the diazo radical occurs in the 4-position to the tertiary amino group.



  The dye thus obtained forms a dark powder which dissolves in the form of an alkali salt in water with a red color and dyes acetate rayon from aqueous solution in red tones. Example: 249 parts of the acidic maleic ester of methyloxethylaminobenzene, obtained by reacting maleic anhydride with methyloxethylaminobenzene, which is in the form of an aqueous solution of an ammonium salt, are added to the diazo solution, which is produced from 139 parts of 1-amino-4-nitrobenzene. one.

   The coupling is completed by prolonged stirring and, if necessary, neutralizing agents, such as. B. sodium acetate, add. The dye is then filtered off and washed a little with water. It is then stirred with a sodium chloride solution and brought to the neutral point with sodium carbonate or with ammonia.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man Methyloxäthylaminobenzol, die Diazoverbin- dung des 1-Amino-4-nitrobenzols und Malein- säureanhydrid derart aufeinander einwirken lässt, PATENT CLAIM: A process for the production of an azo dye, characterized in that methyloxäthylaminobenzene, the diazo compound of 1-amino-4-nitrobenzene and maleic anhydride are allowed to act on one another in such a way that dass der saure Maleinsäureester des Me- thylogäthylaminobenzols gebildet wird und der Diazorest in 4-Stellung zur tertiären Aminogruppe eintritt. Der so erhaltene Farbstoff bildet ein dunkles Pulver, das sich in Form eines Al kalisalzes in Wasser mit roter Farbe löst und Acetatkunstseide aus wäseeriger Lösung in roten Tönen färbt. that the acidic maleic acid ester of methyloethylaminobenzene is formed and the diazo radical is in the 4-position to the tertiary amino group. The dye thus obtained forms a dark powder which dissolves in the form of an alkali metal salt in water with a red color and dyes acetate artificial silk from an aqueous solution in red shades.
CH211826D 1937-09-18 1937-09-18 Process for the preparation of an azo dye. CH211826A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH208950T 1937-09-18
CH211826T 1937-09-18

Publications (1)

Publication Number Publication Date
CH211826A true CH211826A (en) 1940-10-15

Family

ID=25724617

Family Applications (1)

Application Number Title Priority Date Filing Date
CH211826D CH211826A (en) 1937-09-18 1937-09-18 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH211826A (en)

Similar Documents

Publication Publication Date Title
CH211822A (en) Process for the preparation of an azo dye.
CH211826A (en) Process for the preparation of an azo dye.
CH211820A (en) Process for the preparation of an azo dye.
CH211832A (en) Process for the preparation of an azo dye.
CH211817A (en) Process for the preparation of an azo dye.
CH211819A (en) Process for the preparation of an azo dye.
CH211806A (en) Process for the preparation of an azo dye.
CH211821A (en) Process for the preparation of an azo dye.
CH211827A (en) Process for the preparation of an azo dye.
CH211814A (en) Process for the preparation of an azo dye.
CH211811A (en) Process for the preparation of an azo dye.
CH211808A (en) Process for the preparation of an azo dye.
CH211824A (en) Process for the preparation of an azo dye.
CH211812A (en) Process for the preparation of an azo dye.
CH211831A (en) Process for the preparation of an azo dye.
CH211807A (en) Process for the preparation of an azo dye.
CH211805A (en) Process for the preparation of an azo dye.
CH211802A (en) Process for the preparation of an azo dye.
CH211816A (en) Process for the preparation of an azo dye.
CH208950A (en) Process for the preparation of an azo dye.
CH211830A (en) Process for the preparation of an azo dye.
CH211818A (en) Process for the preparation of an azo dye.
CH211815A (en) Process for the preparation of an azo dye.
CH211809A (en) Process for the preparation of an azo dye.
CH211833A (en) Process for the preparation of an azo dye.