CH131269A - Process for the preparation of a derivative of a vat dye. - Google Patents

Process for the preparation of a derivative of a vat dye.

Info

Publication number
CH131269A
CH131269A CH131269DA CH131269A CH 131269 A CH131269 A CH 131269A CH 131269D A CH131269D A CH 131269DA CH 131269 A CH131269 A CH 131269A
Authority
CH
Switzerland
Prior art keywords
derivative
preparation
vat dye
dibromothioindigo
parts
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
Priority claimed from CH129589T external-priority patent/CH129589A/en
Publication of CH131269A publication Critical patent/CH131269A/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
    • C09B7/00—Indigoid dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Indole Compounds (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Description

  

  Verfahren zur Herstellung eines Derivates eines     Kiipenfarbstoffes.       Es wurde gefunden, dass man ein Derivat  eines     Küpenfarbstoffes    erhält, wenn man die       Leukoverbindung    des     5,5'-Dibromthioindigos     mit einer     Monohalogenessigsäure    behandelt.  



  Die neue Verbindung bildet ein rot  braunes Pulver; sie ist in Alkohol sehr  schwer löslich, in Äther,     Benzol,    Chloroform,  Wasser und verdünnten Säuren unlöslich, da  gegen sehr leicht löslich in kalter, verdünnter  Lauge mit gelbbrauner Farbe. Durch Er  wärmen in saurem oder alkalischem Medium  in Gegenwart von     Oxydationsmitteln,    wie  Eisenchlorid oder     Ferricyankalium,    lässt sich  das Produkt zum     5,5'-Dibromthioindigo        zu-          rückverwandeln.     



       Beispiel:     Zu einer Lösung von 300 Teilen     Leuko-          5,5'-Dibromthioindigo    in 160 Teilen Natrium  hydroxyd und 7000 Teilen Wasser werden  180 Teile Chloressigsäure, gelöst in 1200  Teilen Wasser unter Zusatz von 120 Teilen  Soda, zugegeben und das Gemisch während  einer Stunde auf 75 bis 80   erwärmt.

   Hier  auf wird von wenig unverändertem Leuko-         5,5'-Dibromthioindigo        abfiltriert    und das Fil  trat mit 500 Teilen     konzentrierter        ,Salzsäure          angesäuert,    wobei das     Kondensationsprodukt     in Form eines rotbraunen Pulvers sich ab  scheidet, welches     abfiltriert,    mit Wasser aus=  gewaschen.,     getrocknet    und gemahlen wird.



  Process for the preparation of a derivative of a stone dye. It has been found that a derivative of a vat dye is obtained if the leuco compound of 5,5'-dibromothioindigo is treated with a monohaloacetic acid.



  The new compound forms a red-brown powder; it is very sparingly soluble in alcohol, insoluble in ether, benzene, chloroform, water and dilute acids, as it is very easily soluble in cold, dilute lye with a yellow-brown color. By heating it in an acidic or alkaline medium in the presence of oxidizing agents such as iron chloride or potassium ferricyanide, the product can be converted back to 5,5'-dibromothioindigo.



       Example: 180 parts of chloroacetic acid dissolved in 1200 parts of water with the addition of 120 parts of soda are added to a solution of 300 parts of leuco 5,5'-dibromothioindigo in 160 parts of sodium hydroxide and 7000 parts of water, and the mixture is dissolved for one hour 75 to 80 heated.

   Here on the little unchanged leuco 5,5'-dibromothioindigo is filtered off and the Fil was acidified with 500 parts of concentrated hydrochloric acid, the condensation product separating out in the form of a red-brown powder, which is filtered off, washed out with water., Dried and is ground.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Derivates eines güpenfarbstoffes, dadurch gekenn zeichnet, dass man den Leuko-5,5'=Dibrom- thioindigo mit einer Monohalogenessigsäure behandelt. PATENT CLAIM: Process for the preparation of a derivative of a quality dye, characterized in that the leuco-5,5 '= dibromothioindigo is treated with a monohaloacetic acid. Die neue Verbindung bildet ein rotbraunes Pulver; sie ist in Alkohol sehr schwer lös lich, in Äther, Benzol, Chloroform, Wasser und verdünnten .Säuren unlöslich, dagegen sehr leicht löslich in kalter, verdünnter Lauge mit gelbbrauner Farbe. Durch Erwärmen in saurem oder alkalischem Medium, in Gegen wart von Oxydationsmitteln, lässt sich das Produkt .zum 5,5'-Di'bromthioindigo zurück- verwandeln, The new compound forms a red-brown powder; it is very sparingly soluble in alcohol, insoluble in ether, benzene, chloroform, water and dilute acids, but very easily soluble in cold, dilute lye with a yellow-brown color. By heating in an acidic or alkaline medium in the presence of oxidizing agents, the product can be converted back to the 5,5'-di'bromothioindigo,
CH131269D 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye. CH131269A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH129589T CH129589A (en) 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye.
CH131269T 1927-06-08

Publications (1)

Publication Number Publication Date
CH131269A true CH131269A (en) 1929-01-31

Family

ID=25711283

Family Applications (1)

Application Number Title Priority Date Filing Date
CH131269D CH131269A (en) 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye.

Country Status (1)

Country Link
CH (1) CH131269A (en)

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