CH235920A - Process for the preparation of a stilbene dye. - Google Patents

Process for the preparation of a stilbene dye.

Info

Publication number
CH235920A
CH235920A CH235920DA CH235920A CH 235920 A CH235920 A CH 235920A CH 235920D A CH235920D A CH 235920DA CH 235920 A CH235920 A CH 235920A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
stilbene
orange
yellow
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH235920A publication Critical patent/CH235920A/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

  

  Zusatzpatent zum Hauptpatent Nr. 231890.    Verfahren zur Darstellung eines     Stilbenfarbstoffes.            Gegenstand    des vorliegenden     Zusatz-          patentes    ist ein Verfahren     zur    Darstellung  eines     Stilbenfarbstoffes,    dadurch gekenn  zeichnet, dass     matt    2 - (4 -     Aminophenyl)        -          (naphtho-1',2'    :     4,5-triazol)-6',8'-disulfonsäure          und    4,4' -     Dinitrostilben    - 2, 2' -     @disulfonsäure     kondensiert.

   Zur     Reinigung        desi    Farbstoffes  kann auch eine Behandlung mit     einer        Na-          triumhypochloritlösung        angeschlossen    werden.

    <I>Beispiel:</I>  42 - Teile     2-(4-Aminophenyl)-(naphtho,-          1',2'    :     4,5-triazol)-6',8'-disulfonsäure        und    23,7  Teile 4,4'     --dinitrostilben    - 2,2'-     disulfonsaux-es     Natrium werden     in.    einem     Rührkessel    mit  260 Teilen Wasser und 40 Teilen Natron  lauge von 36      Be    15 Stunden unter     Rückfluss     zum Sieden erhitzt. Das Kondensationspro  dukt wird mit     Kochsalz    ausgefällt und ab  filtriert.  



  Zur Reinigung kann der Farbstoff wie  folgt behandelt     werden:    Er wird in 200  Teilen Wasser und 10 Teilen Natronlauge  36      B6    gelöst, 100 Teile     Natriumhypo,chlorit          (1-2%    Cl) zugegeben, 2 Stunden auf 60 bis  70  erhitzt und nach     Beendigung    der Reak  tion mit Kochsalz     ausgesalzen.       Der     getrocknete    Farbstoff stellt ein       oranges    Pulver dar;

   er löst sich in Wasser  mit     gelboranger,    in     konzentrierter        Schwefel-          säure    mit violetter Farbe     und    färbt Baum  wolle und     regenerierte        Cellulose    in licht  echten gelborangen     Tönen,.  



  Additional patent to main patent no. 231890. 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 matt 2 - (4 - aminophenyl) - (naphtho-1 ', 2': 4,5-triazole) -6 ', 8'- disulfonic acid and 4,4 '- dinitrostilbene - 2, 2' - @ disulfonic acid condensed.

   Treatment with a sodium hypochlorite solution can also be used to clean the dye.

    <I> Example: </I> 42 - parts 2- (4-aminophenyl) - (naphtho, - 1 ', 2': 4,5-triazole) -6 ', 8'-disulfonic acid and 23.7 parts 4 , 4'-dinitrostilbene-2,2'-disulfonsaux-es sodium are refluxed for 15 hours in a stirred kettle with 260 parts of water and 40 parts of sodium hydroxide solution of 36 Be. The condensation product is precipitated with common salt and filtered off.



  For purification, the dye can be treated as follows: It is dissolved in 200 parts of water and 10 parts of sodium hydroxide solution 36 B6, 100 parts of sodium hypochlorite (1-2% Cl) are added, the mixture is heated to 60 to 70 for 2 hours and the reaction is complete Salted out with table salt. The dried dye is an orange powder;

   it dissolves in water with a yellow-orange color, in concentrated sulfuric acid with a violet color and dyes cotton and regenerated cellulose in real yellow-orange tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Stilben- farbstoffes, dadurch gekennzeichnet, dass man 2-(4-Aminophenyl)-(naphtho-1',2' :4,5- triazol,)-6',8'-cEsulfonsäure und 4,4'-Dinitro@- stilben-2,2@-.disulfonsäure kondensiert. Der getrocknete Farbstoff stellt ein oran ge Pulver dar; PATENT CLAIM: Process for the preparation of a stilbene dye, characterized in that 2- (4-aminophenyl) - (naphtho-1 ', 2': 4,5-triazole,) - 6 ', 8'-cesulfonic acid and 4, 4'-Dinitro @ - stilbene-2,2 @ -. Disulfonic acid condensed. The dried dye is an orange powder; er löst sieh in Wasser mit gelboranger, in konzentrierter Schwefelsäure mit violetter Farbe und färbt Baumwolle und und regenerierte Gellulose in lichtechten gelborangen Tönen. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass der Farbstoff zur Rei nigung einer Behandlung mit Hypochlorit unterworfen wird. it dissolves in water with yellow-orange color, in concentrated sulfuric acid with violet color and dyes cotton and regenerated gelulose in lightfast yellow-orange tones. SUBClaim: Method according to claim, characterized in that the dye is subjected to a treatment with hypochlorite for cleaning.
CH235920D 1940-11-28 1940-11-28 Process for the preparation of a stilbene dye. CH235920A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH231890T 1940-11-28
CH235920T 1940-11-28

Publications (1)

Publication Number Publication Date
CH235920A true CH235920A (en) 1944-12-31

Family

ID=25727643

Family Applications (1)

Application Number Title Priority Date Filing Date
CH235920D CH235920A (en) 1940-11-28 1940-11-28 Process for the preparation of a stilbene dye.

Country Status (1)

Country Link
CH (1) CH235920A (en)

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