CH231652A - Process for the production of a sulfur dye. - Google Patents

Process for the production of a sulfur dye.

Info

Publication number
CH231652A
CH231652A CH231652DA CH231652A CH 231652 A CH231652 A CH 231652A CH 231652D A CH231652D A CH 231652DA CH 231652 A CH231652 A CH 231652A
Authority
CH
Switzerland
Prior art keywords
sulfur
production
sulfur dye
dye
fastness
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie 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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH231652A publication Critical patent/CH231652A/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
    • C09B49/00—Sulfur dyes
    • C09B49/12—Sulfur dyes from other compounds, e.g. other heterocyclic compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines Schwefelfarbstoffes.         Vorliegendes    Patent bezieht sich auf ein       Verfahren    zur     Herstellung        eines        Schwefel-          farbsto,ffes,        dadurch        gekennzeiehnet"dass    man       Nitrocoeramidtonin,    erhältlich durch Nitrie  ren     des        Coumamidonins    mit etwas mehr als  der berechneten     Menge    :

  Salpetersäure in     kon-          zentrierter        Schwefelsäure,    mit     einem        Alikaln-          Po'lysulfi:d    behandelt.  



       Der    so     erhaltene        Schwefelfarbstoff        ist    ein       .d'uukelgraues        Pulver    und, färbt die pflanz  liche     Faser    aus     dem        SchwefeInatriumbad    in       feldgrauen;    Tönen von guter Echtheit, insbe  sondere von'     guter    Lichtechtheit.  



       Beispiel:          In:    eine     Polysuliidschmelze    aus 70     Teilen          kristallisiertem        Schwefelnatrium,    und' 40 Tei  len-     Schwefel        werden    bei     Kochtemperatur     20 Teile     Niüocopramidlo#nin,

          hergestellt    durch       Nntrieren    des     Coeramidonins    mit etwas     mehr     als     der        berechneten    Menge Salpetersäure in       konzentrierter        Schwefelsäure    eingetragen.

         Bei    einer     TemTeratur    von     118     wird mehrere       Stunden        unter        Rizekfl'uss    gekocht, dann die         Schmelze        eingetrücknet,        anschliessend    die       Temperatur.    auf     2,70         erhöht        und    8     Stunden     bei     270-280     gehalten.

       Nach    dem     Auf-          -schliess'en    des Rohproduktes mit     @Schwefel-          niatrium    und     Natronlauge    wird der     Farbstof    f       aus        seiner        wässerigen        Lösung    durch     An-          säuern        abgeschieden.  



  Process for the production of a sulfur dye. The present patent relates to a process for the production of a sulfur dye, characterized in that one uses nitrocoeramide tonnine, obtainable by nitrating coumamidonine, with a little more than the calculated amount:

  Nitric acid in concentrated sulfuric acid, treated with an alkali polysulphide.



       The sulfur dye obtained in this way is a .d'uukelgraues powder and dyes the vegetable fiber from the sulfur / sodium bath in field gray; Tones of good fastness, especially good light fastness.



       Example: In: a polysilide melt of 70 parts of crystallized sodium sulphide, and 40 parts of sulfur, 20 parts of Niüocopramidlo # nin,

          produced by inerting the coeramidonine with slightly more than the calculated amount of nitric acid in concentrated sulfuric acid.

         At a temperature of 118, the mixture is boiled for several hours under Rizekfl'uss, then the melt is injected, then the temperature. increased to 2.70 and held at 270-280 for 8 hours.

       After the crude product has been broken down with sulfur niatrium and sodium hydroxide solution, the dye is separated out from its aqueous solution by acidification.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines @Schwefel- farbstoffess"dadurch gekennzeichnet, dass- man Nitracoera,im; PATENT CLAIM: Process for the production of a sulfur dye "characterized in that one Nitracoera, im; nd@oniu, erhältlich durch Nitrie ren des Coerami(1#onins mit etwas mehr als der berechneten Menge Salpetersäure in kon- zentrierter Schwefelsäure, mit einem Alkali- Polysulfid behandelt. nd @ oniu, obtainable by nitrating the coerami (1 # onins with a little more than the calculated amount of nitric acid in concentrated sulfuric acid, treated with an alkali polysulphide. Der so erhaltene Schwefelfarbstoff ist ein dunkelgraues Pulver und färbt die pflanz liche Faser aus dem Schwefelnatriumbad in feldgrauen Tönen von , guter Echtheit, insbe sondere von, guter Lichtechtheit. The sulfur dye obtained in this way is a dark gray powder and dyes the vegetable fiber from the sulfur sodium bath in field gray shades of good fastness, in particular of good light fastness.
CH231652D 1941-04-30 1942-03-21 Process for the production of a sulfur dye. CH231652A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE231652X 1941-04-30
CH226453T 1943-03-02

Publications (1)

Publication Number Publication Date
CH231652A true CH231652A (en) 1944-03-31

Family

ID=25726999

Family Applications (1)

Application Number Title Priority Date Filing Date
CH231652D CH231652A (en) 1941-04-30 1942-03-21 Process for the production of a sulfur dye.

Country Status (1)

Country Link
CH (1) CH231652A (en)

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