CH228827A - Process for the preparation of a dye of the stilbene series. - Google Patents

Process for the preparation of a dye of the stilbene series.

Info

Publication number
CH228827A
CH228827A CH228827DA CH228827A CH 228827 A CH228827 A CH 228827A CH 228827D A CH228827D A CH 228827DA CH 228827 A CH228827 A CH 228827A
Authority
CH
Switzerland
Prior art keywords
dye
stilbene
preparation
parts
stilbene series
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 CH228827A publication Critical patent/CH228827A/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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 217235.         Verfahren    zur Herstellung eines     Farbstoffes    der     Stilbenreihe.       Es     wurde        gefunden,        daB        lein    neuer     Farb-          stoff        der        Stilibenmeihe    hergestellt     werden          kann,    wenn man den Farbstoff, der     durch            vorsichtige        Reduktion    von     4,

  4'-Dinitrostilben-          2.,2'-@disul(fonsäure        unter        Verknüpfung        zweier          Moleküle    erhalten     wird,    mit 1     Mol    des     Farb-          stoffes    der Formel  
EMI0001.0028     
         kondensiert.     Der     neue        Farbstoff        stellt    in trockenem       Zustande        ein;

      braunes     Pulver,dar,    das sich     in          Wasser        mit        orangeroter,        in        konzentrierter          Schwefelsäure        mit        blauer        Farbe    löst     und       Baumwolle nach dem     Nachkupferungsver-          fahren        in        braunstichig        roten    Tönen färbt.  



       Der        dem        Verfahren    als     Ausgangsstoff    die  nende     Stilbenfarbstdf    ist als     ein        Gemisch     der     Produkte        ,der        Formeln     
EMI0001.0062     
         und     
EMI0001.0064     
         #        -i        ufzufassen.         Die     Kondensation        kann        beispielsweise     durch     Erhitzen,

          ckr    Komponenten :in     alkali-          schem,        vorzugsweise        ätzalkalischem    Me  dium, offen oder     unter        Druck,    durchgeführt  werden.  



  <I>Beispiel:</I>  11,7 Teile des     Farbstoffes,    der erhalten  wird, wenn man 45     Teile        4,4'-dinitrostilben-          2,2'-disulfons:aumes        Natrium        mit    7     Teilen          Traubenzucker        und    60     Teilen    30 %     iger    Na  tronlauge,     in    etwa 400     Teilen        Wasser    gelöst,

    bei 70     bis    80      reduziert        und    den Farbstoff  in bekannter     Weise    durch     Neutralisieren    und  Zugabe vorn     Natriumchlorid    abscheidet und  6,6 Teile des     Amin-oazofarbstoffes    aus     diazo-          tierter    1-Oxy-2-carboxy-4-a,

  minobenzol-6-sul-         fonsäure    und     1-Methyl-3-amino-4-methoxy-          benzol        werden        untern        Zusatz    von 19     Teilen     30%iger     Natriumhydroxydlösun.g    in 150  Teilen     Wasser    gelöst und etwa 12 Stunden  rückfliessend     gekoeht.    Der nach dem Erkal  ten ausgefallene Farbstoff wird     abfiltriert     und     getrocknet.  



      Additional patent to main patent No. 217235. Process for the production of a dye of the stilbene series. It has been found that a new dye of the stilibs series can be produced if the dye, which is obtained by careful reduction of 4,

  4'-Dinitrostilben- 2., 2 '- @ disulfonic acid is obtained by linking two molecules, with 1 mol of the dye of the formula
EMI0001.0028
         condensed. The new dye sets in the dry state;

      brown powder, which dissolves in water with orange-red, in concentrated sulfuric acid with blue color and colors cotton in brownish red tones after the copper-plating process.



       The stilbene dye used in the process as a starting material is available as a mixture of the products, the formulas
EMI0001.0062
         and
EMI0001.0064
         # -i to be understood. The condensation can be achieved, for example, by heating,

          Components: be carried out in an alkaline, preferably caustic alkaline medium, open or under pressure.



  <I> Example: </I> 11.7 parts of the dye obtained by adding 45 parts of 4,4'-dinitrostilbene-2,2'-disulphone: aumes sodium with 7 parts of grape sugar and 60 parts of 30% strength Sodium hydroxide solution, dissolved in about 400 parts of water,

    reduced at 70 to 80 and the dye is separated in a known manner by neutralizing and adding sodium chloride and 6.6 parts of the amine-oazo dye from diazo-tated 1-oxy-2-carboxy-4-a,

  Minobenzene-6-sulphonic acid and 1-methyl-3-amino-4-methoxy-benzene are dissolved in 150 parts of water with the addition of 19 parts of 30% strength sodium hydroxide solution and refluxed for about 12 hours. The dye which has precipitated out after cooling is filtered off and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Farb stoffes der Stilbenreihe, dadurch gekenn zeichnet, dass man 1 Mol des Farbstoffes, .der durch vorsichtige Reduktion von 4,4'-Dinitro- stil'ben-2, PATENT CLAIM: Process for the production of a dye of the stilbene series, characterized in that 1 mol of the dye, which is obtained by careful reduction of 4,4'-dinitro stilbene-2, 2'-.disullfonsä.u.re unter Verknüpfung zweier Moleküle erhalten wird und der ein Gemisch der folgenden Verbindung dar- stellt, EMI0002.0064 und EMI0002.0066 mit 1 Mol des Farbstoffes der Formel EMI0002.0069 kondensiert. Der neue Farbstoff stellt in trockenem Zustande ein braunes Pulver dar, 2 '-. Disullfonsä.u.re is obtained by linking two molecules and which is a mixture of the following compound, EMI0002.0064 and EMI0002.0066 with 1 mole of the dye of the formula EMI0002.0069 condensed. The new dye is a brown powder when dry, .das sieh in Wasser mit orangerotem, in konzentrierter Schwefelsäure mit blauer Farbe löst und Baumwolle nach dem Nachkupfe:rungsver- fahren in braunstichig -roten Tönen färbt. .that dissolves in water with orange-red color, in concentrated sulfuric acid with blue color, and after the copying process, cotton dyes brownish-red tones.
CH228827D 1940-07-06 1940-07-06 Process for the preparation of a dye of the stilbene series. CH228827A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH228827T 1940-07-06
CH217235T 1941-10-15

Publications (1)

Publication Number Publication Date
CH228827A true CH228827A (en) 1943-09-15

Family

ID=25725974

Family Applications (1)

Application Number Title Priority Date Filing Date
CH228827D CH228827A (en) 1940-07-06 1940-07-06 Process for the preparation of a dye of the stilbene series.

Country Status (1)

Country Link
CH (1) CH228827A (en)

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