CH227295A - 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
CH227295A
CH227295A CH227295DA CH227295A CH 227295 A CH227295 A CH 227295A CH 227295D A CH227295D A CH 227295DA CH 227295 A CH227295 A CH 227295A
Authority
CH
Switzerland
Prior art keywords
dye
stilbene
preparation
mole
parts
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 CH227295A publication Critical patent/CH227295A/en

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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. 217235.    Verfahren zur Herstellung eines Farbstoffes der     Stilbenr        eihe.       Es wurde gefunden, dass ein neuer Farb  stoff der     Stilbenreihe    hergestellt werden kann,  wenn man den Farbstoff, der durch vorsich  tige Reduktion von 4,4'-Dinitrostilben-2,2'-         disulfonsäure    unter Verknüpfung zweier Mole  küle erhalten wird, mit 1     Mol    des Farbstoffes  der Formel:  
EMI0001.0007     
    kondensiert.

    Der neue Farbstoff stellt in     trockenem     Zustande ein dunkles Pulver dar, das sich  in konzentrierter Schwefelsäure mit blauer,  in     _N,#'asser    mit oranger Farbe löst und Baum  wolle aus     glaubersalzhaltigem    Bade in orangen    Tönen färbt, die beim     Behandeln    mit Kupfer  salzen noch etwas röter und sehr gut wasch  echt werden.  



  Der dem Verfahren als     Ausgangsstoff     dienende     Stilbenfarbstoff    ist als ein Gemisch  der Produkte der Formeln    
EMI0002.0001     
    aufzufassen.  Die Kondensation kann beispielsweise  durch Erhitzen der Komponenten in alkali  schem, vorzugsweise     ätzalkalischem    Medium,  offen oder unter Druck, durchgeführt werden.

    <I>Beispiel:</I>  6 Teile des     Farbstoffes,    der erhalten wird,  wenn man 45 Teile     4,4'-dinitrostilben-2,2'-          disulfonsaures    Natrium mit 7 Teilen Trauben  zucker und 60 Teilen 30      /oiger    Natronlauge,  in etwa 400 Teilen Wasser gelöst, bei 70  bis<B>80'</B> reduziert und den Farbstoff in be  kannter Weise durch Neutralisieren und Zu  gabe von     Natriumehlorid    abscheidet, und  5,6 Teile des     Natriumsalzes    des Farbstoffes  aus     diazotierter    4-Amino-4'-oxy-1,1'-azobenzol-         3'-carbonsäure    und     1-(3'-Amino-5'-carboxy-4'-          oxyphenyl)

  -3-methyl-.5-pyrazolon        (sodaalkali-          scheKupplung)    werden in 100 Teilen heissem  Wasser gelöst und nach Zugabe von 16 Tei  len 30      %oiger    Natronlauge 20 Stunden unter       Rückflusskühlung"'gekocht.    Man lässt erkalten  filtriert den ausgeschiedenen     Farbstoff    ab und  löst ihn aus verdünnter Natronlauge um.



      Additional patent to the 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 stilbene series can be produced if the dye, which is obtained by careful reduction of 4,4'-dinitrostilbene-2,2'-disulfonic acid by linking two molecules, has 1 mol of the dye of the formula:
EMI0001.0007
    condensed.

    When dry, the new dye is a dark powder that dissolves in concentrated sulfuric acid with a blue color, in _N, # 'water with an orange color, and colors cotton from a bath containing Glauber's salt in orange tones, which are a little redder when treated with copper salts and very well wash real.



  The stilbene dye used as starting material for the process is available as a mixture of the products of the formulas
EMI0002.0001
    understand. The condensation can be carried out, for example, by heating the components in an alkaline, preferably caustic, medium, openly or under pressure.

    <I> Example: </I> 6 parts of the dye which is obtained when 45 parts of 4,4'-dinitrostilbene-2,2'-disulfonic acid sodium are mixed with 7 parts of grape sugar and 60 parts of 30% sodium hydroxide solution in about 400 parts of water dissolved, reduced at 70 to <B> 80 '</B> and the dye in a known manner by neutralizing and adding sodium chloride, and 5.6 parts of the sodium salt of the dye from diazotized 4-amino 4'-oxy-1,1'-azobenzene-3'-carboxylic acid and 1- (3'-amino-5'-carboxy-4'-oxyphenyl)

  -3-methyl-.5-pyrazolone (soda-alkaline coupling) are dissolved in 100 parts of hot water and, after addition of 16 parts of 30% sodium hydroxide solution, refluxed for 20 hours. The dye which has separated out is allowed to cool, filtered off and dissolved convert it from dilute caustic soda.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Farb stoffes der Stilbenreihe, dadurch gekennzeich net, dass man 1 Mol des Farbstoffes, der durch vorsichtige'Reduktion von 4,4'-Dinitro- stilben-2,2'-disulfonsäure unter Verknüpfung zweier Moleküle erhalten wird und der ein Gemisch der folgenden Verbindungen darstellt: EMI0002.0025 mit 1 Mol des Farbstoffes der Formel: EMI0002.0028 kondensiert. PATENT CLAIM: A process for the production of a dye of the stilbene series, characterized in that one mole of the dye which is obtained by careful reduction of 4,4'-dinitro-stilbene-2,2'-disulfonic acid by linking two molecules and which is a mixture of the following compounds: EMI0002.0025 with 1 mole of the dye of the formula: EMI0002.0028 condensed. Der neue I'arbstoff stellt in trockenem Zustand ein dunkles Pulver dar, das sich in konzentrierter Schwefelsäure mit blauer, in Wasser mit oranger Farbe löst und Baum wolle aus glaubersalzhaltigem Bade in orangen Tönen färbt, die beim Behandeln mit Xupfer- salzen noch etwas röter und sehr gut wasch echt werden. When dry, the new dye is a dark powder that dissolves in concentrated sulfuric acid with a blue color, in water with an orange color and colors cotton from a bath containing Glauber's salt in orange tones, which when treated with copper salts are a little redder and very well wash real.
CH227295D 1940-07-06 1940-07-06 Process for the preparation of a dye of the stilbene series. CH227295A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH227295T 1940-07-06
CH217235T 1941-10-15

Publications (1)

Publication Number Publication Date
CH227295A true CH227295A (en) 1943-05-31

Family

ID=25725971

Family Applications (1)

Application Number Title Priority Date Filing Date
CH227295D CH227295A (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) CH227295A (en)

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