CH212581A - Process for the production of a sulfur dye. - Google Patents

Process for the production of a sulfur dye.

Info

Publication number
CH212581A
CH212581A CH212581DA CH212581A CH 212581 A CH212581 A CH 212581A CH 212581D A CH212581D A CH 212581DA CH 212581 A CH212581 A CH 212581A
Authority
CH
Switzerland
Prior art keywords
sulfur
sulfur dye
production
parts
leucoindophenol
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 CH212581A publication Critical patent/CH212581A/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
    • C09B49/10—Sulfur dyes from diphenylamines, indamines, or indophenols, e.g. p-aminophenols or leucoindophenols

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  • 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  farbstoffes, dadurch gekennzeichnet, dass man  das     Leukoindophenol,    wie es aus     4'-Benzoyl-          aminodiphenyl-1-aminonaphthalin-    8     -sulf        on-          säure    und     p-Aminophenol    erhältlich ist, in  Gegenwart einer     Kupferverbindung    mit     einem          Alkalipolysulfid    behandelt.  



  Der so erhaltene Schwefelfarbstoff ist  ein schwarzes Pulver, das sich in konzen  trierter Schwefelsäure nur schwer mit  schwach     grünstichig    blauer Farbe löst, und  färbt die pflanzliche Faser aus dem     Schwe-          felnatriumbade    in lebhaften     gelbstichig    grü  nen     Tönen    von guten Echtheitseigenschaften.

      <I>Beispiel:</I>    20 Teile des     Leukoindophenols    aus 4'       Benzoylami.nodiphenyl-l-aminonaphthalin-8-          sulfonsäure    und     p-Aminophenol    werden mit  einer wässerigen     Polysulfidlösung    aus 46  Teilen kristallisiertem     Schwefelnatrium    und  47 Teilen Schwefel unter Zusatz von 6 Tei  len Kupfervitriol längere Zeit unter Rück  flusskühlung gekocht. Die     fertige    Schmelze    wird mit etwa 800 Teilen Wasser     verdünnt;     nach Zusatz von 20     Teilen    kristallisiertem  Schwefelnatrium und etwas Kochsalz wird  der Farbstoff mit Luft ausgeblasen und wie  üblich abgeschieden.



  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 the leucoindophenol, as obtainable from 4'-benzoyl-aminodiphenyl-1-aminonaphthalene-8-sulfonic acid and p-aminophenol, is present in the presence treated a copper compound with an alkali polysulfide.



  The sulfur dye obtained in this way is a black powder which is difficult to dissolve in concentrated sulfuric acid and has a slightly greenish blue color, and it dyes the vegetable fibers from the sodium sulfur bath in vivid yellowish green tones with good fastness properties.

      <I> Example: </I> 20 parts of the leucoindophenol from 4 'Benzoylami.nodiphenyl-1-aminonaphthalene-8-sulfonic acid and p-aminophenol are mixed with an aqueous polysulfide solution of 46 parts of crystallized sodium sulfur and 47 parts of sulfur with the addition of 6 parts len copper vitriol boiled under reflux for a long time. The finished melt is diluted with about 800 parts of water; after the addition of 20 parts of crystallized sodium sulphide and a little sodium chloride, the dye is blown out with air and deposited as usual.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Schwe felfarbstoffes, dadurch gekennzeichnet, dass man das Leukoindophenol, wie es aus 4'- Benzoylaminodiphenyl -1- aminonaphthalin-8- sulfonsäure und p-Aminophenol erhältlich ist, in Gegenwart einer Kupferverbindung mit einem Alkalipolysulfid behandelt. PATENT CLAIM: Process for the preparation of a sulfur dye, characterized in that the leucoindophenol, as obtainable from 4'-benzoylaminodiphenyl -1-aminonaphthalene-8-sulfonic acid and p-aminophenol, is treated in the presence of a copper compound with an alkali polysulfide. Der so erhaltene Schwefelfarbstoff ist ein schwarzes Pulver, das sich in konzen trierter Schwefelsäure nur schwer mit schwach grünstichig blauer Farbe löst, und färbt die pflanzliche Faser aus dem Schwe- felnatriumbade in lebhaften gelbstichig grü nen Tönen von guten Echtheitseigenschaften. The sulfur dye obtained in this way is a black powder which is difficult to dissolve in concentrated sulfuric acid and has a slightly greenish blue color, and it dyes the vegetable fibers from the sodium sulfur bath in vivid yellowish green tones with good fastness properties.
CH212581D 1938-02-16 1939-02-07 Process for the production of a sulfur dye. CH212581A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE212581X 1938-02-16
CH207345T 1938-08-19

Publications (1)

Publication Number Publication Date
CH212581A true CH212581A (en) 1940-11-30

Family

ID=25724388

Family Applications (1)

Application Number Title Priority Date Filing Date
CH212581D CH212581A (en) 1938-02-16 1939-02-07 Process for the production of a sulfur dye.

Country Status (1)

Country Link
CH (1) CH212581A (en)

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