CH131270A - 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
CH131270A
CH131270A CH131270DA CH131270A CH 131270 A CH131270 A CH 131270A CH 131270D A CH131270D A CH 131270DA CH 131270 A CH131270 A CH 131270A
Authority
CH
Switzerland
Prior art keywords
derivative
dichlorothioindigo
preparation
vat dye
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 CH131270A publication Critical patent/CH131270A/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)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines Derivates eines     Kiipenfarbstof%s.       Es wurde gefunden, dass man ein Derivat       eines        liüpenfarbstoffes    erhält, wenn man  die     Leukoverbindung    des     6,6'-Dichlorthio-          indigos    mit einer     Monohalogenessigsäure    be  handelt.  



  Die neue Verbindung bildet ein braunes  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 brauner Farbe. Durch Erwärmen  in saurem oder alkalischem Medium in  Gegenwart von Oxydationsmitteln, wie Ei  senchlorid oder     Ferricyankalium,    lässt sich  das Produkt. zum     6,6'-Dichlorthioindigo    zu  rückverwandeln.

           Beispiel:       Zu einer Lösung von<B>30O</B> Teilen     Leuko-          6,6'-Dichlorthioindigo    in .t00 Teilen Na  triumhydroxyd und     12Q0    Teilen Wasser  werden 260 Teile Chloressigsäure, gelöst  in 1400 Teilen Wasser unter Zusatz von    <B>180</B> Teilen Soda., zugegeben und das Ge  misch. während einer Stunde auf 75 bis 80 "  erwärmt.

   Hierauf wird von wenig unver  ändertem     Leuko-6,6'-Dichlorthioindigo    ab  filtriert und das Filtrat mit 600 Teilen kon  zentrierter Salzsäure angesäuert, wobei das  Kondensationsprodukt in Form eines brau  nen Pulvers sich. abscheidet, welches     ab-          filtriert,    mit Wasser ausgewaschen., ge  trocknet und gemahlen wird.



  Process for the preparation of a derivative of a stone dye. It has been found that a derivative of a liuene dye is obtained if the leuco compound of 6,6'-dichlorothioindigo is treated with a monohaloacetic acid.



  The new compound forms a 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 brown color. By heating in an acidic or alkaline medium in the presence of oxidizing agents such as iron chloride or potassium ferricyanide, the product can be. to convert back to 6,6'-dichlorothioindigo.

           Example: 260 parts of chloroacetic acid, dissolved in 1,400 parts of water with the addition of 180, are added to a solution of 30 parts of leuco-6,6'-dichlorothioindigo in 100 parts of sodium hydroxide and 120 parts of water </B> Parts of soda., Added and the mixture. heated to 75 to 80 "for one hour.

   Thereupon, little unchanged leuco-6,6'-dichlorothioindigo is filtered off and the filtrate is acidified with 600 parts of concentrated hydrochloric acid, the condensation product being in the form of a brown powder. is deposited, which is filtered off, washed out with water., dried and ground.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Deri vates eines Iiüpenfarbstoffes, dadurch ge kennzeichnet, dass man den Leuko-6,6'-Di- chlorthioindigo mit einer Monohalogenessig- säure behandelt. Die neue Verbindung bildet ein braunes 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 Laube mit brauner Farbe. PATENT CLAIM: Process for the production of a derivative of a liquid dye, characterized in that the leuco-6,6'-dichlorothioindigo is treated with a monohaloacetic acid. The new compound forms a 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 leaves with a brown color. Durch- Erwärmen in saurem oder alkalischem Medium, in Gegen wart von Oxydationsmitteln, lässt sich das Produkt zum 6,6'-Dichlorthioindigo zurück verwandeln. The product can be converted back to the 6,6'-dichlorothioindigo by heating it in an acidic or alkaline medium in the presence of oxidizing agents.
CH131270D 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye. CH131270A (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.
CH131270T 1927-06-08

Publications (1)

Publication Number Publication Date
CH131270A true CH131270A (en) 1929-01-31

Family

ID=25711284

Family Applications (1)

Application Number Title Priority Date Filing Date
CH131270D CH131270A (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) CH131270A (en)

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