CH231648A - Process for the production of a sulfur dye. - Google Patents

Process for the production of a sulfur dye.

Info

Publication number
CH231648A
CH231648A CH231648DA CH231648A CH 231648 A CH231648 A CH 231648A CH 231648D A CH231648D A CH 231648DA CH 231648 A CH231648 A CH 231648A
Authority
CH
Switzerland
Prior art keywords
production
sulfur
dye
sulfur 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 CH231648A publication Critical patent/CH231648A/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)
  • Pyridine Compounds (AREA)

Description

  

      Zusatzpatent        zum        Hauptpatent    Nr. 226453.         Verfahren    zur Herstellung eines Schwefelfarbstoffes.    Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung eines Schwefel  farbstoffes, dadurch     gekennzeichnet,    dass man       14-Methylcoeramidonin    mit einem     Alkali-          Polysulfid    in Gegenwart eines Kupfersalzes  behandelt.  



  Der so erhaltene Farbstoff ist ein schwärz  liches Pulver und färbt die pflanzliche Faser  aus dem     Schwefelnatriumbad    in     braunstichig     oliven Tönen von guter Echtheit, insbeson  dere von guter Lichtechtheit.  



  <I>Beispiel:</I>  In eine     Polysulfidschmelze    aus 70 Teilen  kristallisiertem     Schwefelnatrium    und 40 Tei  len Schwefel werden bei Kochtemperatur 20  Teile     14-Methyleoeramidonin,    hergestellt zum  Beispiel nach dem Verfahren der deutschen  Patentschrift Nr. 126444, und 5 Teile     Kup-          fervitriol    eingetragen. Bei einer Temperatur  von 118  wird mehrere Stunden     unter    Rück-         fluss    gekocht, dann die Schmelze eingetrock  net; anschliessend die Temperatur auf     etwa     270  erhöht und 8 Stunden bei 270 bis 280   gehalten.

   Nach dem Aufschliessen des Roh  produktes mit Schwefelnatrium und Natron  lauge wird der Farbstoff aus seiner     wässrigen     Lösung durch Ansäuern abgeschieden.



      Additional patent to main patent No. 226453. Process for the production of a sulfur dye. The present patent relates to a process for the preparation of a sulfur dye, characterized in that 14-methylcoeramidonine is treated with an alkali polysulfide in the presence of a copper salt.



  The dye obtained in this way is a blackish powder and dyes the vegetable fiber from the sulfur-sodium bath in brownish olive tones of good fastness, in particular good light fastness.



  <I> Example: </I> In a polysulfide melt of 70 parts of crystallized sodium sulphide and 40 parts of sulfur, 20 parts of 14-methyleoeramidonine, prepared for example according to the method of German patent specification No. 126444, and 5 parts of copper vitriol are added at the boiling temperature registered. At a temperature of 118, the mixture is refluxed for several hours, then the melt is dried up; then the temperature was increased to about 270 and held at 270 to 280 for 8 hours.

   After the raw product has been broken down with sodium sulphide and sodium hydroxide solution, the dye is separated from its aqueous solution by acidification.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Schwefel farbstoffes, dadurch gekennzeichnet, dass man 14-Methylcoeramidonin mit einem Alkali- Polysulfid in Gegenwart eines Kupfersalzes behandelt. Der so erhaltene Farbstoff ist einschwärz liches Pulver und färbt die pflanzliche Faser aus dem Schwefelnatriumbad in braunstichig oliven Tönen von guter Echtheit, insbeson dere von guter Lichtechtheit. PATENT CLAIM: Process for the production of a sulfur dye, characterized in that 14-methylcoeramidonine is treated with an alkali polysulfide in the presence of a copper salt. The dye obtained in this way is a blackish powder and dyes the vegetable fiber from the sulfur-sodium bath in brownish olive tones of good fastness, in particular good light fastness.
CH231648D 1941-04-30 1942-03-21 Process for the production of a sulfur dye. CH231648A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE231648X 1941-04-30
CH226453T 1943-03-02

Publications (1)

Publication Number Publication Date
CH231648A true CH231648A (en) 1944-03-31

Family

ID=25726995

Family Applications (1)

Application Number Title Priority Date Filing Date
CH231648D CH231648A (en) 1941-04-30 1942-03-21 Process for the production of a sulfur dye.

Country Status (1)

Country Link
CH (1) CH231648A (en)

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