CH211827A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH211827A
CH211827A CH211827DA CH211827A CH 211827 A CH211827 A CH 211827A CH 211827D A CH211827D A CH 211827DA CH 211827 A CH211827 A CH 211827A
Authority
CH
Switzerland
Prior art keywords
azo dye
methyloxäthylaminobenzene
preparation
dye
diazo
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 CH211827A publication Critical patent/CH211827A/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

  

  <B>Zusatzpatent</B> zum     Hauptpatent    Nr.     208950,       Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen  wertvollen     Azofarbstoff    erhält, wenn man       i#lethylogäthylaminobenzol,    die     Diazoverbin-          dung    des     1-Amino-2-chlor-4-nitrobenzols    und       Maleinsäureanhydrid    derart aufeinander ein  wirken lässt,

   dass der saure     Maleinsäureester     des     Methyloxäthylaminobenzols    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.  



  <I>Beispiel:</I>  In die     Diazolösung,    die man aus 172,5  Teilen     1-Amino-2-chlor-4-nitrobenzol    herstellt,  trägt man 249 Teile des sauren     Maleinsäure-          esters    des     Methyloxäthylaminobenzols,        erhal-          ien    durch Umsetzung von     Maleinsäureanhy-          drid    mit     111ethy        loxäthylaminobenzol,    der in  Form einer     wässrigen    Lösung eines     Ammo-          niumsalzes    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     Natriumchloridlösung     und stellt mit     Natriumcarbonat    oder mit Am  moniak auf den     Neutralpunkt.  



  <B> Additional patent </B> 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 i # lethylogäthylaminobenzol, the diazo compound of 1-amino-2-chloro-4-nitrobenzene and maleic anhydride can 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.



  <I> Example: </I> 249 parts of the acidic maleic acid ester of methyloxethylaminobenzene, obtained by reaction, are added to the diazo solution which is prepared from 172.5 parts of 1-amino-2-chloro-4-nitrobenzene of maleic anhydride with 111ethyl oxethylaminobenzene, which is in the form of an aqueous solution of an ammonium salt.

   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 adjusted 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-2-chlor-4-nitrobenzols und Maleinsäureanhydrid derart aufeinander ein wirken lässt, dass der saure Maleinsäureester des Methyloxäthylaminobenzols gebildet wird und der Diazorest in 4-Stellung zur tertiären Aminogruppe eintritt. PATENT CLAIM: Process for the production of an azo dye, characterized in that methyloxäthylaminobenzene, the diazo compound of 1-amino-2-chloro-4-nitrobenzene and maleic anhydride act on one another in such a way that the acidic maleic acid ester of methyloxäthylaminobenzene is formed and the diazo radical enters the 4-position to the tertiary amino group. 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. The dye obtained in this way forms a dark powder which, in the form of an alkali salt, dissolves in water with a red color and dyes acetate rayon from an aqueous solution in red shades.
CH211827D 1937-09-18 1937-09-18 Process for the preparation of an azo dye. CH211827A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH208950T 1937-09-18
CH211827T 1937-09-18

Publications (1)

Publication Number Publication Date
CH211827A true CH211827A (en) 1940-10-15

Family

ID=25724618

Family Applications (1)

Application Number Title Priority Date Filing Date
CH211827D CH211827A (en) 1937-09-18 1937-09-18 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH211827A (en)

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