CH211835A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH211835A
CH211835A CH211835DA CH211835A CH 211835 A CH211835 A CH 211835A CH 211835D A CH211835D A CH 211835DA CH 211835 A CH211835 A CH 211835A
Authority
CH
Switzerland
Prior art keywords
methoxy
methyl
azo dye
preparation
dye
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 CH211835A publication Critical patent/CH211835A/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  5 -     Methyl    - 2 -     methoxy-N-äthyloxäthylamino        -          benzol,    die     Diazoverbindung    des     1-Amino-2-          cyan-4-nitrobenzols    und     Maleinbsäureanhydrid     derart aufeinander einwirken lässt,

   dass der  saure     Maleinsäureester    es     5-Methyl-2-me-          thoxy-N-äthyloxäthylaminobenzols    gebildet  wird und der     Diazorest    in     4-Stellung    zur ter  tiären     Aminogruppe        eintritt.     



  Der so erhaltene Farbstoff bildet ein  dunkles Pulver,     das    sich in Form eines       Alkalisalzes    in Wasser mit violetter Farbe  löst und     A.cetatkunstseide    aus wässriger Lö  sung in violetten Tönen färbt.  



  <I>Beispiel:</I>  In die     Diazolösung,    die man aus<B>163</B> Tei  len     1-Amino-2-,cyan-4-nitrobenzol    herstellt,       trägt    man 307 Teile des sauren     Maleinsärure-          esters,    des 5 -     Methyl    - 2 -     methoxy    - N-     äthyl    -         oxäthylaminobenzols,    erhalten durch Um  setzung von     Maleinsäureanhydrid    mit     5-Me-          thyl-2-methogy    - N -     äthyloxäthylaminobenzol,

       der in Form einer     wässrigen    Lösung eines       Ammoniumsalzess        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 Ammo  niak auf den     Neutralpunkt.  



      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 5 - methyl - 2 - methoxy-N-ethyloxethylamino - benzene, the diazo compound of 1-amino-2-cyano-4-nitrobenzene and maleic anhydride, are allowed to act on one another in such a way that

   that the acidic maleic acid ester 5-methyl-2-methoxy-N-ethyloxyethylaminobenzene is formed and the diazo radical is in the 4-position to the tertiary amino group.



  The dye obtained in this way forms a dark powder, which dissolves in the form of an alkali salt in water with a violet color and colors A. acetate artificial silk from aqueous solution in violet tones.



  <I> Example: </I> 307 parts of the acidic maleic acid ester are added to the diazo solution, which is produced from <B> 163 </B> parts of 1-amino-2-, cyano-4-nitrobenzene, des 5 - methyl - 2 - methoxy - N - äthyl - oxäthylaminobenzols, obtained by conversion of maleic anhydride with 5-methyl-2-methoxy - N - äthyloxäthylaminobenzol,

       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 5 - Methyl - 2 - methoxy-N-äthyloxäthylamino - benzol, die Diazoverbindung des 1-Amino-2- eyan-4-nitrobenzol: PATENT CLAIM: Process for the production of an azo dye, characterized in that 5 - methyl - 2 - methoxy-N-ethyloxäthylamino - benzene, the diazo compound of 1-amino-2-eyan-4-nitrobenzene: s und Maleinsäureanhydrid derart aufeinander einwirken lässt, dass der saure Maleinsäureester des 5-Methyl-2-me- thoxy-N-äthyloxäthylaminobenzols 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 Alka.lisalzes in Wasser mit violetter Farbe löst und Aoetatkunstsei@de aus wäBriger Lö sung in violetten Tönen färbt. s and maleic anhydride can act on one another in such a way that the acidic maleic acid ester of 5-methyl-2-methoxy-N-ethyloxethylaminobenzene is formed and the diazo radical is in the 4-position to the tertiary amino group. The dye obtained in this way forms a dark powder which dissolves in the form of an alkali salt in water with a violet color and colors acetate artificial silk from aqueous solution in violet tones.
CH211835D 1937-09-18 1937-09-18 Process for the preparation of an azo dye. CH211835A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH208950T 1937-09-18
CH211835T 1937-09-18

Publications (1)

Publication Number Publication Date
CH211835A true CH211835A (en) 1940-10-15

Family

ID=25724626

Family Applications (1)

Application Number Title Priority Date Filing Date
CH211835D CH211835A (en) 1937-09-18 1937-09-18 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH211835A (en)

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