CH228821A - Process for the preparation of a stilbene dye. - Google Patents

Process for the preparation of a stilbene dye.

Info

Publication number
CH228821A
CH228821A CH228821DA CH228821A CH 228821 A CH228821 A CH 228821A CH 228821D A CH228821D A CH 228821DA CH 228821 A CH228821 A CH 228821A
Authority
CH
Switzerland
Prior art keywords
dye
red
preparation
brown
acid
Prior art date
Application number
Other languages
German (de)
Inventor
J R Geigy A G
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH228821A publication Critical patent/CH228821A/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
    • C09B56/00—Azo dyes containing other chromophoric systems
    • C09B56/04—Stilbene-azo dyes

Landscapes

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

Description

       

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 217234.         'Verfahren    zur Darstellung eines     Stilbenfarbstoffes.       Gegenstand :des     vorliegenden    Zusatzpaten  tes ist ein Verfahren zur Darstellung eines       Stilbenfarbstoffes,    dadurch .gekennzeichnet,  dass man     4,4'-Dinitros        @tilben-2,2'-disulfonsäure          mit,dem        Azofarbstoff        4-Nitro-2-amino-l-ogy-          benzol        ->-        3'-Amino-C-phenyl-1,2-N-imi:

  d-          a@zolo-5-ogynaphtha-Iin-i7-isulfons!äure        konden-          siert        u        id    :das     Kondensationsprodukt        anschlie-          ssend    mit     kup:ferabgebendenMittelnbehandelt.     <I>Beispiel:</I>  52 Teile des Farbstoffes, hergestellt     durch     Kuppeln von     diazotiertem        4-Nitro-2-amino-l-          ogybenzol    mit     3'-Amino-C-phenyl-1,2-N-imid-          azalo:-5-:

  ogynaphthalin-7-isulfonsäure    werden  mit 47,4 Teilen     4,4'-idi-nitroistilben-2,2'-@disul-          fonsaurem.    Natrium     in    500 Teilen Wasser und  80 Teilen Natronlauge von 36      B6    während  10-12     Stunden    bei 100-105      unter    Rück  fluss     kondensiert.    Nach     :dem    Erkalten     wird          die    Natronlauge mit     Salzsäure        neutralisiert,     dann     wird    der Farbstoff mit     Kochsalz     vollends ausgefällt und filtriert;

   anschliessend  wird er mit     kupferabgebenden        Mitteln        in    übli-    eher     Weise        in        :die        Kupferverbindung        überge-          führt.     



  Der neue     Farbstoff        stellt        ein,dunkelbrau-          nes    Pulver :dar, das sich in Wasser mit rot  brauner,     in        konzentrierter    Schwefelsäure mit       rotvioletter    Farbe löst und     Cellulosefasern    in  rotbraunen Tönen von sehr guter Lichtecht  heit färbt.



  <B> Additional patent </B> to main patent no. 217234. 'Process for the preparation of a stilbene dye. The subject of the present additional patent is a process for the preparation of a stilbene dye, characterized in that 4,4'-dinitros @ tilbene-2,2'-disulfonic acid is used, the azo dye 4-nitro-2-amino-l-ogy - benzene -> - 3'-amino-C-phenyl-1,2-N-imi:

  d- a @ zolo-5-ogynaphtha-lin-i7-isulphonic acid condenses u id: the condensation product is then treated with copper-releasing agents. <I> Example: </I> 52 parts of the dye, prepared by coupling diazotized 4-nitro-2-amino-l-ogybenzene with 3'-amino-C-phenyl-1,2-N-imidazalo: -5-:

  ogynaphthalene-7-isulphonic acid with 47.4 parts of 4,4'-idi-nitroistilbene-2,2 '- @ disulphonsaurem. Sodium condensed in 500 parts of water and 80 parts of sodium hydroxide solution of 36 B6 for 10-12 hours at 100-105 under reflux. After: cooling, the sodium hydroxide solution is neutralized with hydrochloric acid, then the dye is completely precipitated with common salt and filtered;

   then it is converted into the copper compound in the usual way with copper-releasing agents.



  The new dye is a dark brown powder: which dissolves in water with a red-brown color, in concentrated sulfuric acid with a red-violet color and dyes cellulose fibers in red-brown shades of very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Stilben- farbstoffes, dadurch gekennzeichnet, :dass man 4,4'-Dinitrostilben-2,2'-,disulfons,äure mit dem Azofarbs.toff 4-Nitro-2-.amino-l-ogybenzol 3'-A@mino-C-phenyl-1, 2-N-imidazolo-5- ogynaphthaHn-7-ssulfons: PATENT CLAIM: Process for the preparation of a stilbene dye, characterized in that: 4,4'-dinitrostilbene-2,2 '-, disulfonic acid is mixed with the azo dye 4-nitro-2-amino-1-ogybenzene 3 '-A @ mino-C-phenyl-1,2-N-imidazolo-5- ogynaphthaHn-7-ssulfons: äure kondensiert. und das Kondensationsprodukt anschliessend mit kupferabgebenden Mitteln behandelt. Der neue Farbstoff stellt ein Junkelbrau- nes Pulver dar, das sich in Wasser mit rot brauner, in, acid condensed. and the condensation product is then treated with copper-releasing agents. The new dye is a junk brown powder that turns red-brown in water, in, konzentrierter .Schwefelsäure mit rotvioletter Farbe löset und Cellulosefasern in rotbraunen Tönen von sehr guter Lichtecht- heit färbt. concentrated sulfuric acid with a red-violet color dissolves and dyes cellulose fibers in red-brown shades of very good lightfastness.
CH228821D 1939-07-03 1939-07-03 Process for the preparation of a stilbene dye. CH228821A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH228821T 1939-07-03
CH217234T 1940-11-20

Publications (1)

Publication Number Publication Date
CH228821A true CH228821A (en) 1943-09-15

Family

ID=25725949

Family Applications (1)

Application Number Title Priority Date Filing Date
CH228821D CH228821A (en) 1939-07-03 1939-07-03 Process for the preparation of a stilbene dye.

Country Status (1)

Country Link
CH (1) CH228821A (en)

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