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CH222134A - Process for the preparation of a 1,1'-dioxyazo dye. - Google Patents

Process for the preparation of a 1,1'-dioxyazo dye.

Info

Publication number
CH222134A
CH222134A CH222134DA CH222134A CH 222134 A CH222134 A CH 222134A CH 222134D A CH222134D A CH 222134DA CH 222134 A CH222134 A CH 222134A
Authority
CH
Switzerland
Prior art keywords
dye
dioxyazo
preparation
blue
water
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz A G
Original Assignee
Sandoz Ag
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 Sandoz Ag filed Critical Sandoz Ag
Publication of CH222134A publication Critical patent/CH222134A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Herstellung eines     1.1'-Dlogyazofarbstoffes.       Das vorliegende Patent betrifft ein Ver  fahren zur Herstellung eines 1 .     1'-Dioxyazo-          farbstoffes    und ist dadurch gekennzeichnet,  dass man     4-Benzoylamino-2-amino-l-oxyben-          zol-6-suHonsäure        diazotiert    und in konzen  triert     ätzalkalischer    Lösung mit     1-0xynaph-          thalin    vereinigt.  



       Beispiel:     Die isolierte     Diazoverbindung    entspre  chend 61,6 kg     4-Benzoylamino-2-amino-l-          oxybenzol-6-sulfonsäure    wird bei - 2   ein  getragen in eine Aufschlämmung von     1-Oxy-          naphthalin-Natrium    in konzentrierter Na  tronlauge, welche sich dadurch herstellen lässt,  dass die Lösung von 29 kg     1-Oxynaphthalin     in 20     Liter    Wasser und 30 kg 30 %     iger    Na  tronlauge in eine auf 0   gekühlte Lösung von  170 kg     Ätznatron    in 280 Liter Wasser ein  gerührt wird. Die Masse beginnt sich sofort  dunkel zu färben.

   Nach     beendigter    Kupplung  verdünnt man mit 500 Liter Wasser, neu  tralisiert die überschüssige Natronlauge mit  Salzsäure bis zur     Abscheidung    des Farbstof  fes, filtriert ab und reinigt, wenn nötig, durch  Umlösung.    Der getrocknete und gepulverte Farbstoff  stellt ein dunkles Pulver dar und löst sich in  Wasser mit blauer, in konzentrierter Schwe  felsäure mit blauroter Farbe. Er färbt Wolle  nach dem     Naehehromierungs-    oder Einbad  chromverfahren in     grünstichig    marineblauen  Tönen von vorzüglichen     Echtheiten.  



  Process for the preparation of a 1.1'-dlogyazo dye. The present patent relates to a method for producing a 1. 1'-dioxyazo dye and is characterized in that 4-benzoylamino-2-amino-1-oxybenzene-6-suHonic acid is diazotized and combined with 1-oxynaphthalene in a concentrated caustic solution.



       Example: The isolated diazo compound corresponding to 61.6 kg of 4-benzoylamino-2-amino-l-oxybenzene-6-sulfonic acid is carried into a slurry of 1-oxynaphthalene-sodium in concentrated sodium hydroxide solution, which is can be prepared in that the solution of 29 kg of 1-oxynaphthalene in 20 liters of water and 30 kg of 30% sodium hydroxide solution is stirred into a solution of 170 kg of caustic soda in 280 liters of water, cooled to 0. The mass immediately begins to turn dark.

   When the coupling is complete, it is diluted with 500 liters of water, the excess sodium hydroxide solution is neutralized with hydrochloric acid until the dye has separated out, filtered off and, if necessary, purified by dissolving. The dried and powdered dye is a dark powder and dissolves in water with a blue color, in concentrated sulfuric acid with a blue-red color. It dyes wool in greenish navy-blue tones with excellent fastness properties using the chromium-plated or single-bath chrome process.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines 1.1'- Dioxyazofarbstoffes, dadurch gekennzeich net, dass man 4-Benzoylamino-2-amino-l-oxy- benzol-6-sulfonsäure diazotiert und in kon zentriert ätzalkalischer Lösung mit 1-Oxy- naphthalin vereinigt. Der neue Farbstoff stellt ein dunkles Pulver dar und löst sich in Wasser mit blauer, in konzentrierter Schwefelsäure mit blauroter Farbe. Claim: Process for the preparation of a 1.1'-dioxyazo dye, characterized in that 4-benzoylamino-2-amino-1-oxybenzene-6-sulfonic acid is diazotized and combined with 1-oxynaphthalene in concentrated caustic solution. The new dye is a dark powder and dissolves in water with a blue color, in concentrated sulfuric acid with a blue-red color. Er färbt Wolle nach dem Nachchromierungs- oder Einbadchromver- fahren in grünstichig marineblauen Tönen von vorzüglichen Echtheiten. It dyes wool using the post-chrome plating or single-bath chrome process in greenish navy blue shades with excellent fastness properties.
CH222134D 1940-02-22 1940-02-22 Process for the preparation of a 1,1'-dioxyazo dye. CH222134A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH218365T 1940-02-22
CH222134T 1940-02-22

Publications (1)

Publication Number Publication Date
CH222134A true CH222134A (en) 1942-06-30

Family

ID=25726148

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222134D CH222134A (en) 1940-02-22 1940-02-22 Process for the preparation of a 1,1'-dioxyazo dye.

Country Status (1)

Country Link
CH (1) CH222134A (en)

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