CH192038A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH192038A
CH192038A CH192038DA CH192038A CH 192038 A CH192038 A CH 192038A CH 192038D A CH192038D A CH 192038DA CH 192038 A CH192038 A CH 192038A
Authority
CH
Switzerland
Prior art keywords
azo dye
production
new azo
new
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 CH192038A publication Critical patent/CH192038A/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
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 190423.    Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man die     Diazover-          bindung    des     1-Aminobenzol-2-benzyl-4-äthyl-          disulfons    in saurer Lösung mit     1-Amino-5-          oxynaphthalin-2-sulfonsäure    vereinigt. Der  neue Farbstoff bildet ein dunkles Pulver, das  sich in Wasser mit blauer Farbe löst und  Wolle aus saurem Bade in echten blauen  Tönen färbt.

           Beispiel:       339 Teile     1-Aminobenzol-2-benzyl-4-äthyl-          disulfon    werden in verdünnter Essigsäure mit  250 Teilen Salzsäure vom spezifischen Ge  wicht<B>1,16</B> verrührt und langsam mit einer  konzentrierten Lösung von 69 Teilen Natrium  nitrit versetzt. In diese durch Zusatz von Eis  gekühlte     Diazolösung    lässt man eine neutra  lisierte Lösung von 239 Teilen     1-Amino-5-          oxynaphthalin-2-sulfonsäure        zutropfen.    Die       Farbstoffbildung    kann durch Zusatz neutra-         lisierender    Mittel, wie z.

   B.     Natriumacetat     oder     Natriumformiat,    beschleunigt werden.  Man kann die Umsetzung auch bei mässig  erhöhter Temperatur durchführen. Der ent  standene     Farbstoff    wird     abfiltriert,    durch  Lösen in heissem Wasser und Zugabe eines       Alkalis,Aussalzen        undFiltrieren    und Trocknen  isoliert.



      Additional patent to main patent No. 190423. Process for the production of a new azo dye. It has been found that a new azo dye is obtained if the diazo compound of 1-aminobenzene-2-benzyl-4-ethyl-disulfone is combined in acidic solution with 1-amino-5-oxynaphthalene-2-sulfonic acid. The new dye forms a dark powder that dissolves in water with a blue color and dyes wool from an acid bath in true blue tones.

           Example: 339 parts of 1-aminobenzene-2-benzyl-4-ethyl-disulfone are stirred in dilute acetic acid with 250 parts of hydrochloric acid with a specific weight of 1.16 and slowly mixed with a concentrated solution of 69 parts of sodium nitrite added. A neutralized solution of 239 parts of 1-amino-5-oxynaphthalene-2-sulfonic acid is added dropwise to this diazo solution, cooled by the addition of ice. The dye formation can be achieved by adding neutralizing agents, such as

   B. sodium acetate or sodium formate, are accelerated. The reaction can also be carried out at a moderately elevated temperature. The resulting dye is filtered off, isolated by dissolving in hot water and adding an alkali, salting out and filtering and drying.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung des 1-Aminobenzol- 2-benzyl-4-äthyldisulfons in saurem Medium mit 1-Amino-5-oxynaphthalin-2-sulfonsäure vereinigt. Der neue Farbstoff bildet ein dunkles Pulver, das sich in Wasser mit blauer Farbe löst und Wolle aus saurem Bade in echten blauen Tönen färbt. PATENT CLAIM Process for the preparation of a new azo dye, characterized in that the diazo compound of 1-aminobenzene-2-benzyl-4-ethyldisulfone is combined with 1-amino-5-oxynaphthalene-2-sulfonic acid in an acidic medium. The new dye forms a dark powder that dissolves in water with a blue color and dyes wool from an acid bath in true blue tones.
CH192038D 1935-09-07 1935-09-07 Process for the production of a new azo dye. CH192038A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH192038T 1935-09-07
CH190423T 1935-09-07

Publications (1)

Publication Number Publication Date
CH192038A true CH192038A (en) 1937-07-15

Family

ID=25721978

Family Applications (1)

Application Number Title Priority Date Filing Date
CH192038D CH192038A (en) 1935-09-07 1935-09-07 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH192038A (en)

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