CH233354A - Process for the preparation of an o, o'-dioxyazo dye. - Google Patents

Process for the preparation of an o, o'-dioxyazo dye.

Info

Publication number
CH233354A
CH233354A CH233354DA CH233354A CH 233354 A CH233354 A CH 233354A CH 233354D A CH233354D A CH 233354DA CH 233354 A CH233354 A CH 233354A
Authority
CH
Switzerland
Prior art keywords
dye
dioxyazo
red
preparation
parts
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH233354A publication Critical patent/CH233354A/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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B31/00—Workpiece holders or hold-downs in machines for sewing leather
    • D05B31/02—Welt guides

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)

Description

  

  Verfahren zur Darstellung eines     o,o'-Diogyazofarbstoffes.       Gegenstand vorliegenden     Zusatzpatentes     ist ein Verfahren zur Darstellung     eines        o,o'-          Dioxyazofarbstoffes,dadurch    ,gekennzeich  net, dass man     diazotiertes        6-Nitro-4-tert.butyl-          2-aminophenol    mit p -     Sulf        ophenylmethyl-          pyrazolon,    vorzugsweise in Gegenwart von       Pyridin,    kuppelt.

   Der neue     Farbstoff    bildet  ein rotviolettes Pulver, dessen Lösungsfarbe  in Wasser rot, in Schwefelsäure gelborange  ist und der Wolle in sehr echten, gelbstickig  roten Tönen färbt.  



       Beispiel:     21 Teile     6-Nitro-4-tert.butyl-2-amino-          phenol    werden in 200 Teilen Alkohol gelöst,  30 Teile     conc.    Salzsäure zugesetzt und bei  0  mit einer Lösung von 6,9 Teilen Natrium  nitrit     in    10 Teilen Wasser     diazotiert.    Die       Diazolösung    fliesst zu einer Lösung von 25,4  Teilen     p-Sulfophenylmethylpyrazolon    in 300  Teilen Wasser und 22 Teilen Soda als säure-    bindendes Mittel. Der Farbstoff fällt kristal  lisiert     aus..    Nach     beendeter    Kupplung wird       abfiltriert    und getrocknet.  



  Der neue Farbstoff färbt     nachchromiert          ein    gelbstickig Rot. Gewisse Eigenschaften  sind gegenüber     @d-em    Farbstoff aus dem     4-          31Tethylderivat    verbessert, besonders aber und  in hohem Masse das Ziehen nach dem     Einbad-          chromierverfahren.  



  Process for the preparation of an o, o'-diogyazo dye. The present additional patent is a process for the preparation of an o, o'-dioxyazo dye, characterized in that diazotized 6-nitro-4-tert.butyl-2-aminophenol with p-sulfophenylmethylpyrazolone, preferably in the presence of pyridine , clutch.

   The new dye forms a red-violet powder, the solution color of which is red in water and yellow-orange in sulfuric acid and dyes the wool in very genuine, yellowish-red tones.



       Example: 21 parts of 6-nitro-4-tert-butyl-2-aminophenol are dissolved in 200 parts of alcohol, 30 parts of conc. Added hydrochloric acid and diazotized at 0 with a solution of 6.9 parts of sodium nitrite in 10 parts of water. The diazo solution flows into a solution of 25.4 parts of p-sulfophenylmethylpyrazolone in 300 parts of water and 22 parts of soda as an acid-binding agent. The dye precipitates crystallized out .. After coupling is complete, it is filtered off and dried.



  When chromed, the new dye turns a yellowish red. Certain properties are improved compared to @ d-em dye from the 4–31-methyl derivative, but especially and to a large extent the drawing according to the single-bath chroming process.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines o,ö -Di- oxyazofarbstoffes, dadurch gekennzeichnet, dass man diazotiertes 6-Nitro-4-tert.butyl-2- aminophenol mit p-Sulfophenylmethylpyrazo- lon kuppelt. Der neue Farbstoff bildet ein rotviolettes Pulver, dessen Lösungsfarbe in Wasser rot, ,in .Schwefelsäure gelborange ist und der Wolle in sehr echten, gelbstickig roten Tönen färbt. PATENT CLAIM: Process for the production of an o, ö -dioxyazo dye, characterized in that diazotized 6-nitro-4-tert-butyl-2-aminophenol is coupled with p-sulfophenylmethylpyrazolone. The new dye forms a red-violet powder, the solution color of which is red in water, yellow-orange in sulfuric acid and colors the wool in very genuine, yellow-tinged red tones.
CH233354D 1942-07-25 1942-07-25 Process for the preparation of an o, o'-dioxyazo dye. CH233354A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH231067T 1942-07-25
CH233354T 1942-07-25

Publications (1)

Publication Number Publication Date
CH233354A true CH233354A (en) 1944-07-15

Family

ID=25727543

Family Applications (1)

Application Number Title Priority Date Filing Date
CH233354D CH233354A (en) 1942-07-25 1942-07-25 Process for the preparation of an o, o'-dioxyazo dye.

Country Status (1)

Country Link
CH (1) CH233354A (en)

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