CH235921A - Process for the preparation of a stilbene dye. - Google Patents

Process for the preparation of a stilbene dye.

Info

Publication number
CH235921A
CH235921A CH235921DA CH235921A CH 235921 A CH235921 A CH 235921A CH 235921D A CH235921D A CH 235921DA CH 235921 A CH235921 A CH 235921A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
stilbene
parts
acid
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 CH235921A publication Critical patent/CH235921A/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

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  • 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,    welches dadurch     .ge-          kennzeichnet    ist, dass man     2-(4-Amino-          phenyl)-(naphtho-1',2'    :

       4,5-triazol)-5',7'-di-          sulfonsäure,    2 - (4 -     Aminophenyl)    -     (naphtho.-          1',2'    :     4,5-triazol)-6'-sulfonsäure    und     4,4'-D-          nitrostilben    - 2,2' -     ,disulfonsäure        kondensiert.     Zur     Reinigung    des     Farbstoffes    kann auch  eine Behandlung mit einer     Natriumhypo-          chloritlösüng    angeschlossen werden.

      <I>Beispiel:</I>  42 Teile     2-(4-Aminophenyl)-(naphtho-          1',    2' : 4,5 -     triazol)    - 5',<B>V-</B>     .disulfousäure,    34  Teile     2-(4-Aminophenyl)-(naphtho--1',2'    :

       4,5--          triazal)-6'-sulTonsäure    und 47;4 Teile     4,4'-di-          nitrostilben-2,2'-disulfonsaures        Natrium    wer  den mit 500 Teilen     Wasser    und<B>.80</B>     Teilen     Natronlauge     36'B6    12-15 Stunden rück  fliessend kondensiert und das     Kondensations-          produkt    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     Natriumhypochlorit          (12; o    Cl) zugegeben, 3     -Stunden    auf 90 bis  100  erhitzt und nach     Beendigung    der Reak  tion     mit    Kochsalz     ausgesalzen.     



  Der     getrocknete        ungereinigte    Farbstoff  stellt ein     orangebraunes    Pulver dar; er löst  sich .in Wasser mit gelber, in konzentrierter  Schwefelsäure mit     blauroter    Farbe und färbt  Baumwolle     und        regenerierte        Cellulose    in  lichtechten     .rotsticbäg    gelben Tönen.     Der        mit          Hypocblorit    behandelte Farbstoff färbt       Baumwolle    in     etwas        grünstichigerem,    reine  rem Gelb.



      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, which is characterized in that 2- (4-aminophenyl) - (naphtho-1 ', 2':

       4,5-triazole) -5 ', 7'-disulfonic acid, 2 - (4 - aminophenyl) - (naphtho.-1', 2 ': 4,5-triazole) -6'-sulfonic acid and 4,4 '-D- nitrostilbene - 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) - 5 ', <B> V- </B> .disulfous acid, 34 parts 2- (4-aminophenyl) - (naphtho - 1 ', 2':

       4,5-- triazal) -6'-sulfonic acid and 47; 4 parts of 4,4'-di-nitrostilben-2,2'-disulfonic acid sodium with 500 parts of water and <B> .80 </B> parts Sodium hydroxide solution 36'B6 is refluxed for 12-15 hours and the condensation product is precipitated with sodium chloride and filtered off.

           For cleaning, 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 (12; o Cl) are added, the mixture is heated to 90 to 100 hours for 3 hours and the reaction is complete salted out with table salt.



  The dried, unpurified dye is an orange-brown powder; it dissolves in water with a yellow color, in concentrated sulfuric acid with a blue-red color and dyes cotton and regenerated cellulose in lightfast, red-stained yellow tones. The dye treated with Hypocblorit dyes cotton in a slightly greener, pure yellow.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Stilben- farbstoffes, dadurch gekennzeichnet, dass man 2 - (4-Amino@phenylj- (naphtho -1',2' : 4,5 -tri" azol)-5',7'-dis@ulfons@äure, 2-(4-Aminophenyl)- (nap@htho-1',2' : 4,5-triazol)-6'-sulfons.äure und 4,4'-Dinitro-stilben-2,2'-disulfonsäure konden siert. PATENT CLAIM: Process for the preparation of a stilbene dye, characterized in that 2 - (4-Amino @ phenylj- (naphtho -1 ', 2': 4,5 -tri "azole) -5 ', 7'-dis @ sulfonic acid, 2- (4-aminophenyl) - (nap @ htho-1 ', 2': 4,5-triazole) -6'-sulfonic acid and 4,4'-dinitro-stilbene-2,2 ' -disulfonic acid condensed. Der getrocknete Farbstoff .stellt ein orangebraunes Pulver dar; er löst sich in Wasser mit gelber, in konzentrierter Schwe felsäure mit blauroter Farbe und färbt Baumwolle und regenerierte Cellulose in lichtechten gelben Tönen. UNTERANSPRUCH: erfahren nach Patentanspruch, dadurch gekennzeichnet, dass der Farbstoff zur Rei- ; nigung einer Behandlung mit Hypoehlorit unterworfen wird. The dried dye represents an orange-brown powder; it dissolves in water with a yellow color, in concentrated sulfuric acid with a blue-red color and dyes cotton and regenerated cellulose in lightfast yellow tones. SUBCLAIM: Learned according to claim, characterized in that the dye is used for rubbing; treatment with hypoehlorit.
CH235921D 1940-11-28 1940-11-28 Process for the preparation of a stilbene dye. CH235921A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH231890T 1940-11-28
CH235921T 1940-11-28

Publications (1)

Publication Number Publication Date
CH235921A true CH235921A (en) 1944-12-31

Family

ID=25727644

Family Applications (1)

Application Number Title Priority Date Filing Date
CH235921D CH235921A (en) 1940-11-28 1940-11-28 Process for the preparation of a stilbene dye.

Country Status (1)

Country Link
CH (1) CH235921A (en)

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