CH129589A - 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
CH129589A
CH129589A CH129589TA CH129589A CH 129589 A CH129589 A CH 129589A CH 129589T A CH129589T A CH 129589TA CH 129589 A CH129589 A CH 129589A
Authority
CH
Switzerland
Prior art keywords
derivative
vat dye
preparation
parts
water
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 to CH129589T priority Critical patent/CH129589A/en
Priority to CH131270D priority patent/CH131270A/en
Priority to CH131272D priority patent/CH131272A/en
Priority to CH131269D priority patent/CH131269A/en
Priority to CH131271D priority patent/CH131271A/en
Publication of CH129589A publication Critical patent/CH129589A/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
    • C09B9/00—Esters or ester-salts of leuco compounds of vat dyestuffs
    • C09B9/04—Esters or ester-salts of leuco compounds of vat dyestuffs of indigoid dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Description

  

  Verfahren zur Herstellung eines Derivates eines     Küpenfarbstoffes.       Es wurde gefunden, dass man ein Derivat  eines     Küpenfarbstoffes    erhält, wenn man die       Leukoverbindung    des     Thioindigos    mit einer       1Zonohalogenessigsäure    behandelt.  



  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 starker blauer Fluoreszenz. Durch  Erwärmen in saurem oder alkalischem Me  dium, in Gegenwart von Oxydationsmitteln,  wie Eisenchlorid oder     Ferricyankalium,    lässt  sich das Produkt zum     Thioindigo    zurück  verwandeln.

      <I>Beispiel:</I>    Zu einer Lösung von 350 Teilen     Leuko-          thioindigo    in 150 Teilen     Natriumhydroxyd     und 350 Teilen Wasser     werden    830 Teile  Chloressigsäure, gelöst in 1500 Teilen Was  ser, unter Zusatz von 200 Teilen Soda, zu  gegeben und das Gemisch während einer  Stunde auf 75 bis 80   erwärmt. Hierauf  wird von wenig unverändertem Leukothio-    Indigo     abfiltriert    und das Filtrat mit 200  Teilen konzentrierter Salzsäure angesäuert,  wobei das Kondensationsprodukt in Form  eines orangegelben Pulvers sich abscheidet,  welches     abfiltriert,    mit Wasser ausgewa  schen, getrocknet und gemahlen wird.



  Process for the preparation of a derivative of a vat dye. It has been found that a derivative of a vat dye is obtained if the leuco compound of thioindigo is treated with a zonohaloacetic 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, but very easily soluble in cold, dilute lye with strong blue fluorescence. The product can be converted back to thioindigo by heating in an acidic or alkaline medium in the presence of oxidizing agents such as iron chloride or potassium ferricyanide.

      <I> Example: </I> To a solution of 350 parts of leukothioindigo in 150 parts of sodium hydroxide and 350 parts of water, 830 parts of chloroacetic acid, dissolved in 1500 parts of water, with the addition of 200 parts of soda, are added and the mixture heated to 75 to 80 for one hour. Thereupon little unchanged leukothio indigo is filtered off and the filtrate is acidified with 200 parts of concentrated hydrochloric acid, the condensation product separating out in the form of an orange-yellow powder, which is filtered off, washed out with water, dried and ground.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung- eines Deri vates eines Küpenfarbstoffes, dadurch ge kennzeichnet, dass man den Leukothioindigo mit einer Monohalogenessigsäure behandelt. 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 starker blauer Fluoreszenz. Durch Erwärmen in saurem oder alkalischem Me dium, in Gegenwart von Oxydationsmitteln, lässt sich das Produkt zum Thioindigo zu- rückvem-andeln. PATENT CLAIM: Process for the production of a derivative of a vat dye, characterized in that the leukothioindigo 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, but very easily soluble in cold, dilute lye with strong blue fluorescence. The product can be converted back to thioindigo by heating in an acidic or alkaline medium in the presence of oxidizing agents.
CH129589T 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye. CH129589A (en)

Priority Applications (5)

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.
CH131270D CH131270A (en) 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye.
CH131272D CH131272A (en) 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye.
CH131269D CH131269A (en) 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye.
CH131271D CH131271A (en) 1927-06-08 1927-06-08 Process for the preparation of a derivative of a vat dye.

Applications Claiming Priority (1)

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.

Publications (1)

Publication Number Publication Date
CH129589A true CH129589A (en) 1928-12-17

Family

ID=4387976

Family Applications (1)

Application Number Title Priority Date Filing Date
CH129589T CH129589A (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) CH129589A (en)

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