CH235709A - Process for the production of a sulfur dye. - Google Patents

Process for the production of a sulfur dye.

Info

Publication number
CH235709A
CH235709A CH235709DA CH235709A CH 235709 A CH235709 A CH 235709A CH 235709D A CH235709D A CH 235709DA CH 235709 A CH235709 A CH 235709A
Authority
CH
Switzerland
Prior art keywords
sulfur
production
dianilido
anthraquinone
dye
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 CH235709A publication Critical patent/CH235709A/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
    • C09B49/04—Sulfur dyes from amino compounds of the benzene, naphthalene or anthracene series

Landscapes

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

Description

  

  <B>Zusatzpatent</B>     zum    Hauptpatent Nr. 231495.    Verfahren zur Herstellung     eines    Schwefelfarbstoffes.    Vorliegendes Patent bezieht sich auf ein  Verfahren zur Herstellung     eines    Schwefel  farbstoffes, dadurch gekennzeichnet,-     dass    man       Dinitro-1.5-dianilido-anthrachinon,    hergestellt  durch Nitrieren des 1.5 -     Dianilido    -     anthra-          chinons    mit Salpetersäure in konzentrierter  Schwefelsäure,

   mit einem     schwefelnden    Mit  tel behandelt     und    die dabei erhaltene Roh  schmelze     unter    Verwendung von Schwefel  alkali aufschliesst.  



  Der so erhaltene Farbstoff ist- ein     dunkles     Pulver und färbt die pflanzliche Faser aus  dem     Schwefelnatriumbad    in echten grau  schwarzen Farbtönen, insbesondere von einer  sehr guten Lichtechtheit.  



       Beispiel:     In eine     Polysulfidschmelze    aus 140 Tei  len kristallisiertem     Schwefelnatrium    und  80 Teilen Schwefel werden bei Kochtempera  tur 40 Teile     Dinitro    - 1.5 -     dianilido    -     anthra-          chinon,    hergestellt durch.

   Nitrieren des     1.5-          Dianilido-anthrachinons    mit Salpetersäure in       konzentrierter    Schwefelsäure,     eingetragen.     Bei     einer        Temperatur    von 118'     wird    mehrere         Stunden    unter     Rückfluss    gekocht, dann die  Schmelze     eingetrocknet,    anschliessend     die     Temperatur auf 270  erhöht und 8     Stunden     bei 270 bis 280  gehalten.

   Nach dem Auf  schliessen des Rohproduktes mit Schwefel  natrium und Lauge wird der Farbstoff     .aus     seiner     wässrigen        Lösung    durch     Ansäuern    ab  geschieden.



  <B> Additional patent </B> to main patent no. 231495. 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 - dinitro-1,5-dianilido-anthraquinone, produced by nitrating the 1,5-dianilido-anthraquinone with nitric acid in concentrated sulfuric acid,

   treated with a sulphurizing agent and the crude melt obtained in the process breaks down using alkali sulfur.



  The dye obtained in this way is a dark powder and dyes the vegetable fibers from the sulfur-sodium bath in real gray-black shades, especially of very good lightfastness.



       Example: In a polysulfide melt of 140 parts of crystallized sodium sulfur and 80 parts of sulfur, 40 parts of dinitro - 1.5 - dianilido - anthraquinone are produced by at boiling temperature.

   Nitration of the 1,5-dianilido-anthraquinone with nitric acid in concentrated sulfuric acid, registered. At a temperature of 118 ', the mixture is refluxed for several hours, then the melt is dried, then the temperature is increased to 270 and held at 270 to 280 for 8 hours.

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

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Schwefel farbstoffes, dadurch gekennzeichnet, dass man Dinitro - 1.5 - dianilido - anthrachinon, herge stellt durch Nitrieren des 1.5 - Dianilido- anthrachinons mit Salpetersäure in konzen trierter Schwefelsäure, mit einem schwefeln den Mittel behandelt und die dabei erhaltene Rohschmelze unter Verwendung von Schwe felalkali aufschliesst. PATENT CLAIM: Process for the production of a sulfur dye, characterized in that dinitro - 1.5 - dianilido - anthraquinone, produced by nitrating the 1.5 - dianilido anthraquinone with nitric acid in concentrated sulfuric acid, is treated with a sulfurizing agent and the crude melt obtained in this way digests using sulfur alkali. Der so erhaltene Farb stoff ist ein dunkles Pulver und färbt die pflanzliche Faser aus dem Schwefelnatrium bad in echten grauschwarzen Farbtönen, ins besondere von einer sehr guten Lichtechtheit. The dye obtained in this way is a dark powder and colors the vegetable fibers from the sulfur sodium bath in real gray-black shades, in particular with very good lightfastness.
CH235709D 1941-12-18 1942-12-21 Process for the production of a sulfur dye. CH235709A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE235709X 1941-12-18
CH231495T 1944-03-09

Publications (1)

Publication Number Publication Date
CH235709A true CH235709A (en) 1944-12-15

Family

ID=25727601

Family Applications (1)

Application Number Title Priority Date Filing Date
CH235709D CH235709A (en) 1941-12-18 1942-12-21 Process for the production of a sulfur dye.

Country Status (1)

Country Link
CH (1) CH235709A (en)

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