CH141767A - Process for the preparation of an alkaline cotton dye of the stilbene series. - Google Patents

Process for the preparation of an alkaline cotton dye of the stilbene series.

Info

Publication number
CH141767A
CH141767A CH141767DA CH141767A CH 141767 A CH141767 A CH 141767A CH 141767D A CH141767D A CH 141767DA CH 141767 A CH141767 A CH 141767A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
alkaline
acid
stilbene
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
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 Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH141767A publication Critical patent/CH141767A/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)
  • Coloring (AREA)

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 125479.    Verfahren zur Darstellung     eines        alkaliechten    Baumwollfarbstoffes der     Stilbenreihe.       Es     wurde    gefunden, dass man zu einem       alkaliechten    Baumwollfarbstoff der     Stilben-          reihe    gelangen kann, wenn man das gelb  orange färbende Kondensationsprodukt der  pp' -     Dinitrostilben    -     oo'    -     disulfosäure    mit       Amidoazobenzolsulfosäure    der Formel:

    
EMI0001.0013     
    mit einem Oxydationsmittel, wie zum Bei  spiel     Hypochl.orit,    behandelt.         Beispiel:       50 kg des nach dem deutschen Reichspatent  Nr. 204212 hergestellten gelborange färben  den Kondensationsproduktes aus     pp'-Dinitro-          stilben-oo'-disulfosäure    und     Amidoazobenzol-          sulfosäure    der Formel:

    
EMI0001.0020     
    werden durch Aufkochen mit 200 Liter  Wasser und 10 kg Soda in feine Verteilung    gebracht, auf 30   gekühlt und mit 200 Liter       10%iger        Natriumhypochloritlösung    erhitzt,  einige Stunden bei 30       gerührt,    dann er  wärmt, mit Salzsäure neutralisiert und der  Farbstoff     ausgesalzen.     



  Der Farbstoff stellt ein rotes Pulver dar,  das sich in Wasser mit oranger Farbe, in  konzentrierter Schwefelsäure mit     rotstichig     blauer Farbe löst und Baumwolle in rot  stichig gelbem Ton anfärbt. Die Färbungen  sind     klarer,        gelbstichiger    und     alkaliechter     als diejenigen des     unoxydierten    Farbstoffes.



      Additional patent to main patent no. 125479. Process for the preparation of an alkaline cotton dye of the stilbene series. It has been found that an alkaline-fast cotton dye of the stilbene series can be obtained if the yellow-orange condensation product of pp '- dinitrostilbene - oo' - disulfonic acid is mixed with amidoazobenzenesulfonic acid of the formula:

    
EMI0001.0013
    treated with an oxidizing agent such as Hypochl.orit. Example: 50 kg of the yellow-orange produced according to the German Reich Patent No. 204212 color the condensation product of pp'-dinitro-stilbene-oo'-disulfonic acid and amidoazobenzene sulfonic acid of the formula:

    
EMI0001.0020
    are brought into fine distribution by boiling with 200 liters of water and 10 kg of soda, cooled to 30 and heated with 200 liters of 10% sodium hypochlorite solution, stirred for a few hours at 30, then he warmed, neutralized with hydrochloric acid and salted out the dye.



  The dye is a red powder that dissolves in water with an orange color, in concentrated sulfuric acid with a reddish blue color and dyes cotton in a reddish yellow shade. The colorations are clearer, more yellowish and more alkaline than those of the unoxidized dye.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines alkali- echten Stilbenfarbstöffes, dadurch gekenn zeichnet, dass man das gelborange färbende Kondensationsprodukt, das durch Konden sation von pp'-Dinitrostilben-oo'-disulfosäure mit Amidoazobenzolsulfosäure der Formel: EMI0001.0035 gewonnen wird, mit einem Oxydationsmittel behandelt. Der Farbstoff stellt ein rotes Pulver dar, das sich in Wasser mit oranger Farbe, in konzentrierter Schwefelsäure mit rotstickig blauer Farbe löst und Baumwolle in rot stickig gelbem Ton anfärbt. PATENT CLAIM: Process for the preparation of an alkali-true stilbene dye, characterized in that the yellow-orange condensation product, which is formed by condensation of pp'-dinitrostilbene-oo'-disulfonic acid with amidoazobenzenesulfonic acid of the formula: EMI0001.0035 is obtained, treated with an oxidizing agent. The dye is a red powder that dissolves in water with an orange color, in concentrated sulfuric acid with a red sticky blue color and dyes cotton in a red sticky yellow shade. Die Färbungen sind klarer, gelbstickiger und alkaliechter als diejenigen des unoxydierten Farbstoffes. The colorations are clearer, more yellowish and more alkaline than those of the unoxidized dye.
CH141767D 1929-01-17 1929-01-17 Process for the preparation of an alkaline cotton dye of the stilbene series. CH141767A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH141767T 1929-01-17
CH125479T 1929-01-17

Publications (1)

Publication Number Publication Date
CH141767A true CH141767A (en) 1930-08-15

Family

ID=25710493

Family Applications (1)

Application Number Title Priority Date Filing Date
CH141767D CH141767A (en) 1929-01-17 1929-01-17 Process for the preparation of an alkaline cotton dye of the stilbene series.

Country Status (1)

Country Link
CH (1) CH141767A (en)

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