CH228830A - 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
CH228830A
CH228830A CH228830DA CH228830A CH 228830 A CH228830 A CH 228830A CH 228830D A CH228830D A CH 228830DA CH 228830 A CH228830 A CH 228830A
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 CH228830A publication Critical patent/CH228830A/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.     21723e.       Verfahren zur Herstellung eines Farbstoffes der     Stilbenreihe.       Es     wurde        gedunden,        dass    ein neuer Farb  stoff     dex        Stil!benrelhe    'hergestellt     werdren     kann, wenn     man    dem Farbstoff, der durch    vorsichtige     Reduktion    von     4,4'-Dinitrostilben,          2,2'-.düulfon;

  siäure        unter        Verknüpfung        zweier          Moleküle    erhalten     wird,        mit    1     Mol        des    Farb  stoffes     dler        Formel     
EMI0001.0025     
         kondensiert.     Der neue Farbstoff stellt .getrocknet     ein     braunes Pulver dar,     das    sieh     in        konzentrIer-          ter        Sohwefelsäure    mit     blauer,

      in     Waeser        mit          brauno,rani-er    Farbe löst     und        Baumwolle    bei    Gegenwart von Kupfersalzen in echten, brau  nen Tönen     färbt.     



  Dar     dem        Verfahren        als    Ausgangsstoff       dienende         -Stilben.farbstoff    ist     als    ein     Gemisch          der    Produkte der     Formeln     
EMI0001.0049     
         aufzufassen.         Die     Kon@dlensation    kann     beispielsweise     durch Erhitzen der Komponenten in alka  lischem, vorzugsweise     ätzalkalisehem    Me  dium, offen oder unter     Druck,    durchgeführt       werden.     



       Beispiel:     18     Teile    des Farbstoffes, der erhalten  wird,     wenn    man 45 Teile     4,4'-,diuitrostilben-          2,2'.disulfonsaures    Natrium mit 7 Teilen       Traubenzucker        und    60 Teilen 30 %     iger    Na  tronlauge,     in        etwa    400 Teilen     Wasser    ge  löst, bei 70     bis    80      reduziert    und den Farb  stoff in bekannter     Weise    durch Neutralisie  ren und Zugabe von     Natriumachlorid    abschei  det,

       und    6 Teile ödes     Natriumsalzes:    .der       4-.        Amino    -     4'-oxy    -     ä'-        methylazobenzol    - 5'-     car-          bonsäure    werden in 200 Teilen Wasser und  18 Teilen     f0    %     iger        Natriumhydroxydlösung            gelöst    und 12 Stunden     rückfliessend        gekocht.     Nach dem Erkalten wird     Jer        ausgefallene     Farbstoff  <RTI  

   ID="0002.0038">   abfiltriert;    sollte er noch etwas     un-          veränderten        Monoazofarbstoff    enthalten, so       wird    er unter Zusatz von etwas Natrium  hydroxyd in heissem Wasser gelöst und durch  Zusatz von     ca.    5 %     Chlornatrium    wieder aus  gefällt.



      Additional patent to main patent No. 21723e. Process for the preparation of a dye of the stilbene series. It was invented that a new dye dex Stil Benrelhe 'could be produced if the dye, which was obtained by careful reduction of 4,4'-dinitrostilbene, 2,2' -. Düulfon;

  Acid is obtained by linking two molecules, with 1 mole of the dye of the formula
EMI0001.0025
         condensed. When dried, the new dye is a brown powder that looks in concentrated sulfuric acid with blue,

      Dissolves in water with brown, rani-er color and dyes cotton in the presence of copper salts in real, brown tones.



  The -stilbene dye, which serves as the starting material for the process, is available as a mixture of the products of the formulas
EMI0001.0049
         understand. The condensation can be carried out, for example, by heating the components in an alkaline, preferably caustic alkali, medium, openly or under pressure.



       Example: 18 parts of the dye obtained when 45 parts of 4,4 ', diuitrostilbene 2,2'.disulfonic acid sodium with 7 parts of grape sugar and 60 parts of 30% sodium hydroxide solution are dissolved in about 400 parts of water , reduced at 70 to 80 and the dye separated in the known manner by neutralizing and adding sodium chloride,

       and 6 parts of the desolate sodium salt: the 4-. Amino-4'-oxy-ä'-methylazobenzene-5'-carboxylic acid are dissolved in 200 parts of water and 18 parts of f0% sodium hydroxide solution and refluxed for 12 hours. After cooling, the precipitated dye becomes <RTI

   ID = "0002.0038"> filtered off; should it still contain some unchanged monoazo dye, it is dissolved in hot water with the addition of a little sodium hydroxide and precipitated out again by adding about 5% sodium chloride.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Farb stoffes der Stilben.reihe, dadurch gekenn zeichnet, daB man 1 Mal des Farbstoffes, der durch vorsiehtigeReduktion von 4,4'-Dinitro- stil'ben-2,2'-,disul!foneäu,re unter Verknüpfung zweier Moleküle erhalten wird und der ein Gemisch der folgenden Verbindungen dar stellt, EMI0002.0051 mit 1 Mol .des Farbstoffes der Formel EMI0002.0054 Der neue Farbstoff stellt getrocknet ein braunes Pulver,dar, PATENT CLAIM: Process for the production of a dye of the stilbene series, characterized in that one time the dye, which is obtained by the intended reduction of 4,4'-dinitro-stilbene-2,2 '-, disul! Foneäu, re is obtained by linking two molecules and which is a mixture of the following compounds, EMI0002.0051 with 1 mole of the dye of the formula EMI0002.0054 The new dye, when dried, is a brown powder, das sich in konzentrier ter Schwefelsäure mit blauer, in Wasser mit bra.unoranger Farbe löst und Baumwolle bei Gegenwart von Kupfersalzen in echten, braunen Tönen färbt. which dissolves in concentrated sulfuric acid with a blue color, in water with a brownish-orange color and dyes cotton in the presence of copper salts in real, brown tones.
CH228830D 1940-07-06 1940-07-06 Process for the preparation of a dye of the stilbene series. CH228830A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH228830T 1940-07-06
CH217235T 1941-10-15

Publications (1)

Publication Number Publication Date
CH228830A true CH228830A (en) 1943-09-15

Family

ID=25725977

Family Applications (1)

Application Number Title Priority Date Filing Date
CH228830D CH228830A (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) CH228830A (en)

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