CH110421A - Process for the preparation of an indigoid dye. - Google Patents

Process for the preparation of an indigoid dye.

Info

Publication number
CH110421A
CH110421A CH110421DA CH110421A CH 110421 A CH110421 A CH 110421A CH 110421D A CH110421D A CH 110421DA CH 110421 A CH110421 A CH 110421A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
indigoid dye
indigoid
chloro
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
Publication of CH110421A publication Critical patent/CH110421A/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
    • C09B7/00—Indigoid dyes
    • C09B7/10—Bis-thionapthene indigos

Landscapes

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

Description

  

  Verfahren zur Darstellung eines     indigoiden        Farbstoffes.       Es wurde gefunden, dass man einen     indi-          golden    Farbstoff erhalten kann,     wenn,        mau     das     1-Chlor-2,3-niaphththioindoxyl    mit oxy  dierend wirkenden Mitteln behandelt.  



  Der Farbstoff stellt ein     violettblaues    Pul  ver dar, das sich in     Schwefelsäuremonohydrat     mit grüner Farbe löst. Mit     Hydrosulfit    und  Natronlauge gibt er eine     olivebraune        Küpe,     aus welcher     Baumwolle    in blauen Farbtönen  von sehr guter Echtheit gefärbt wird.  



  <I>Beispiel:</I>  235 Teile     1-Chlor-2,3-naphththioindoxyl     werden in 6000 Teilen 5     %iger    Natronlauge  gelöst. Durch die Lösung wird unter Rüh  ren bei 70 bis<B>80'</B> ein Luftstrom geleitet, bis  die Oxydation     beendigt    ist. Der abgeschie  dene Farbstoff wird     filtriert,    mit Wasser ge  waschen und getrocknet.    Zu demselben Farbstoff gelangt     man    auch,  wenn man     statt        Sauerstoff    andere     oxydierend     wirkende Mittel, wie zum Beispiel     Ferricyan-          kalium,        verwendet.  



  Process for the preparation of an indigoid dye. It has been found that an indi-golden dye can be obtained if the 1-chloro-2,3-niaphthioindoxyl is treated with oxidizing agents.



  The dye is a violet-blue powder that dissolves in sulfuric acid monohydrate with a green color. With hydrosulfite and caustic soda, he gives an olive-brown vat from which cotton is dyed in blue shades of very good fastness.



  <I> Example: </I> 235 parts of 1-chloro-2,3-naphththioindoxyl are dissolved in 6000 parts of 5% sodium hydroxide solution. An air stream is passed through the solution with stirring at 70 to 80 'until the oxidation is complete. The deposited dye is filtered, washed with water and dried. The same dye can also be obtained if other oxidizing agents, such as ferricyanopotassium, are used instead of oxygen.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines indigoi- den Farbstoffes, dadurch gekennzeichnet, dass man das 1-Chlor-2,3-naphththioindoxyl mit oxydierend wirkenden Mitteln behandelt. PATENT CLAIM: Process for the preparation of an indigoid dye, characterized in that the 1-chloro-2,3-naphththioindoxyl is treated with oxidizing agents. Der Farbstoff stellt ein violettblaues Pulver dar, das sich in Schwefelsäuremono- hydrat mit grüner Farbe löst, mit Hydro- sulfit und Natronlauge gibt er eine olive- bnaune Küpe, aus welcher Baumwolle in blauen Farbtönen von sehr guter Echtheit gefärbt wird. The dye is a violet-blue powder that dissolves in sulfuric acid monohydrate with a green color; with hydrosulphite and caustic soda it gives an olive-brown vat from which cotton is dyed in blue shades of very good fastness.
CH110421D 1923-12-18 1923-12-18 Process for the preparation of an indigoid dye. CH110421A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH110421T 1923-12-18
CH109483T 1923-12-18

Publications (1)

Publication Number Publication Date
CH110421A true CH110421A (en) 1925-06-01

Family

ID=25707577

Family Applications (1)

Application Number Title Priority Date Filing Date
CH110421D CH110421A (en) 1923-12-18 1923-12-18 Process for the preparation of an indigoid dye.

Country Status (1)

Country Link
CH (1) CH110421A (en)

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