CH211838A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH211838A
CH211838A CH211838DA CH211838A CH 211838 A CH211838 A CH 211838A CH 211838D A CH211838D A CH 211838DA CH 211838 A CH211838 A CH 211838A
Authority
CH
Switzerland
Prior art keywords
dye
methyl
azo dye
preparation
brown
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 CH211838A publication Critical patent/CH211838A/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

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

Description

  

  Zusatzpatent zum     Flauptpatent        Nr.    208950.    Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde ,gefunden,     .dass    man einen     neuen     wertvollen     Azofarbstoff    erhält, wenn man  5 -     Methyl    - N -     äthyloxäthylaminobenzal,    die       Diazoverbind'ung    des     1-Amino-2,6-dichlor-4-          nitrobenzols    und     Maleinsäureanhydrid    derart  aufeinander einwirken lässt,

   dass der saure       Maleinsäureester    des 5 -     Methyl    - N -     äthyl        -          oxäthylaminobenzols    gebildet wird und der       Diazorest    in     4-Stellung    zur     tertiären        Amino-          gruppe        eintritt.     



  Der     eo    erhaltene Farbstoff bildet ein       dunkles    Pulver, das sich in Form     eines          Alkalisälzes        2n        Wasser    mit     brauner    Farbe  löst und     Acotatkunstseide    aus     wässriger    Lö  sung in braunen Tönen färbt.  



       Beispiel:     In die     Diazolösung,    die man aus 207 Tei  len     1-Amino-2,6-dichlor-4=nitrobenzol    her  stellt, trägt man 277 Teile     des        sauren        Ma-          leinsäureesters        .des    5-DZethyl-N-äthyloxäthyl-         aminobenzols,    erhalten durch Umsetzung von       Maleinsäureanhydrid    mit     5-Me@thyl-N-äthyl-          oxäthylaminobenzol,

      der in     Form    einer     wäss-          rigen    Lösung eines     Ammoniumsalzes    vor  liegt, ein. Man     führt        edie    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 .ge  waschen.

   Man verrührt ihn     dann    mit einer       Natriumchloridlösung    und     stellt    mit Na  triumcarbonat oder mit     Ammoniak    auf den       Neutralpunkt.  



  Additional patent to Flaupt patent no. 208950. Process for the production of an azo dye. It has been found that a new valuable azo dye is obtained if 5 - methyl - N - äthyloxäthylaminobenzal, the diazo compound of 1-amino-2,6-dichloro-4-nitrobenzene and maleic anhydride are allowed to act on one another in such a way that

   that the acidic maleic acid ester of 5 - methyl - N - ethyl - oxäthylaminobenzols is formed and the diazo radical occurs in the 4-position to the tertiary amino group.



  The dye obtained forms a dark powder which dissolves in the form of an alkali salt in 2N water with a brown color and dyes acotate artificial silk from aqueous solution in brown tones.



       Example: In the diazo solution, which is made from 207 parts of 1-amino-2,6-dichloro-4-nitrobenzene, 277 parts of the acidic maleic acid ester of 5-DZethyl-N-ethyloxethyl aminobenzene are obtained by reacting maleic anhydride with 5-methyl-N-ethyl-oxäthylaminobenzol,

      which is in the form of an aqueous solution of an ammonium salt. The coupling is completed by prolonged stirring and neutralizing agents, such as e.g. 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 neutral using sodium carbonate or ammonia.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 5 - Methyl - N - äthyloxäthylaminobenzol, die Diazoverbindung : PATENT CLAIM: Process for the production of an azo dye, characterized in that 5 - methyl - N - äthyloxäthylaminobenzol, the diazo compound: des 1-Amino-,2,6-dichlor-4- nitrobenzols und Haleinsäureanhydridderart aufeinander einwirken lässt, dass der saure Maleinsäureester des 5 -Methyl-N-äthyl- oxäthylaminobenzols gebildet wird und der Diazorest in 4-Stellung zur tertiären Amino- gruppe eintritt. Der so erhaltene Farbstoff bildet ein dunkles Pulver, of 1-amino-, 2,6-dichloro-4-nitrobenzene and haleinic anhydride can act on one another in such a way that the acidic maleic acid ester of 5-methyl-N-ethyl-oxäthylaminobenzols is formed and the diazo radical enters the 4-position to the tertiary amino group . The dye thus obtained forms a dark powder, das sich in Form eines Alkalisa.lzes in Wasser mit brauner FärbE löst und Aeetatkunstseide aus wässriger Lö sung in braunen Tönen färbt. which dissolves in the form of an alkali metal in water with a brown dye and dyes acetate artificial silk from an aqueous solution in brown tones.
CH211838D 1937-09-18 1937-09-18 Process for the preparation of an azo dye. CH211838A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH208950T 1937-09-18
CH211838T 1937-09-18

Publications (1)

Publication Number Publication Date
CH211838A true CH211838A (en) 1940-10-15

Family

ID=25724629

Family Applications (1)

Application Number Title Priority Date Filing Date
CH211838D CH211838A (en) 1937-09-18 1937-09-18 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH211838A (en)

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