CH209561A - Process for the preparation of a water-soluble azo dye. - Google Patents

Process for the preparation of a water-soluble azo dye.

Info

Publication number
CH209561A
CH209561A CH209561DA CH209561A CH 209561 A CH209561 A CH 209561A CH 209561D A CH209561D A CH 209561DA CH 209561 A CH209561 A CH 209561A
Authority
CH
Switzerland
Prior art keywords
water
preparation
azo dye
soluble azo
mol
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH209561A publication Critical patent/CH209561A/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/38—Trisazo dyes ot the type
    • C09B35/44—Trisazo dyes ot the type the component K being a hydroxy amine
    • C09B35/46—Trisazo dyes ot the type the component K being a hydroxy amine the component K being an amino naphthol
    • C09B35/463—D being derived from diaminodiphenyl

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

      Zusatzpatent    zum     Hauptpatent    Nr. 206724.    Verfahren zur Herstellung eines wasserlöslichen     Azofarbstoffes.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines wasser  löslichen     Azofarbstoffes.    Das Verfahren ist  dadurch gekennzeichnet, dass man 1     Mol          tetrazotiertes        Benzidin    in saurem Medium  mit 1     Mol        1-Amino-8-naphthol-3,6-disulfoii-          säure    kuppelt,

   auf den gebildeten     Monoazo-          farbstoff    1     Mol        diazotiertes    Anilin alkalisch  einwirken lässt und anschliessend mit     r-(N-          Methylanilino)-p-ogypropanthiosohwefelsäure     kuppelt.  



  Der neue Farbstoff stellt ein dunkles, in  Wasser leicht lösliches Pulver dar und färbt  Leder und Baumwolle in tiefen schwarzen  Tönen.    <I>Beispiel:</I>  184 Gewichtsteile     Benzidin    werden in der  üblichen Weise     tetrazotiert    und in mineral  saurer Lösung mit 341 Gewichtsteilen des       Monoriatriiimsalzes    der     1-Amino-8-naphthol-          3,6-disulfonsäure    vereinigt. Nach Beendigung  der Reaktion werden 93 Gewichtsteile Anilin  nach bekannter Vorschrift     diazotiert    und zu  gegeben.

   Dann wird unter Kühlen und     la,äf-          tigem    Rühren so lange eine wässerige Soda  lösung     zugetropft,    bis die Kupplungsbrühe  deutlich     sodaalkalisch    reagiert. Sobald die  Reaktion des     Diazobenzols    verschwunden ist,  werden 299 Gewichtsteile     r-(N-methylanilino)-          ,Q-ogypropanthioschwefelsaures    Natrium, ge  löst in Wasser,     zugegeben.    Nach Beendigung  der     Farbstoffbildung    wird das Reaktions  produkt, das die Konstitution  
EMI0001.0032     
      besitzt, durch Aussahen isoliert. Es färbt  Leder und Baumwolle in tiefen Schwarz  tönen an.



      Additional patent to main patent no. 206724. Process for the production of a water-soluble azo dye. The present patent relates to a process for the preparation of a water-soluble azo dye. The process is characterized in that 1 mole of tetrazotized benzidine is coupled with 1 mole of 1-amino-8-naphthol-3,6-disulfoic acid in an acidic medium,

   1 mol of diazotized aniline is allowed to act alkaline on the monoazo dye formed and then coupled with r- (N-methylanilino) -p-ogypropanthiosulfuric acid.



  The new dye is a dark powder that is easily soluble in water and dyes leather and cotton in deep black tones. <I> Example: </I> 184 parts by weight of benzidine are tetrazotized in the usual way and combined in a mineral acidic solution with 341 parts by weight of the monoriimal salt of 1-amino-8-naphthol-3,6-disulfonic acid. After the reaction has ended, 93 parts by weight of aniline are diazotized and added according to known instructions.

   Then, while cooling and stirring vigorously, an aqueous soda solution is added dropwise until the coupling liquor has a distinctly soda-alkaline reaction. As soon as the reaction of the diazobenzene has disappeared, 299 parts by weight of sodium r- (N-methylanilino), Q-ogypropanethiosulfuric acid, dissolved in water, are added. After the formation of the dye has ended, the reaction product, which has the constitution
EMI0001.0032
      owns, isolated by appearance. It stains leather and cotton in deep black tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines wasser löslichen Azofarbstoffes, dadurch gekennzeich net, dass man 1 Mol tetrazotiertes Benzidin in saurem Medium mit 1 Mol 1-Amino-8- naphthol-3,6-disulfonsärrre kuppelt, auf den gebildeten Monoazofarbstoff 1 Mol diazotier- tes Anilin alkalisch einwirken lässt und. an schliessend mit r-(N-MMethylanilino)-p-o$ypro- panthioschwefelsäure kuppelt. PATENT CLAIM: Process for the preparation of a water-soluble azo dye, characterized in that 1 mol of tetrazotized benzidine is coupled in an acidic medium with 1 mol of 1-amino-8-naphthol-3,6-disulfonic acid, and 1 mol of diazotized tes is added to the monoazo dye formed Aniline has an alkaline effect and. then with r- (N-MMethylanilino) -p-o $ ypropanthiosulphuric acid. Der neue Farbstoff stellt ein dunkles, in Wasser leicht lösliches Pulver dar und färbt Leder und Baumwolle in tiefen schwarzen Tönen. The new dye is a dark powder that is easily soluble in water and dyes leather and cotton in deep black tones.
CH209561D 1937-08-19 1938-08-16 Process for the preparation of a water-soluble azo dye. CH209561A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE209561X 1937-08-19
CH206724T 1938-08-16

Publications (1)

Publication Number Publication Date
CH209561A true CH209561A (en) 1940-04-15

Family

ID=25724342

Family Applications (1)

Application Number Title Priority Date Filing Date
CH209561D CH209561A (en) 1937-08-19 1938-08-16 Process for the preparation of a water-soluble azo dye.

Country Status (1)

Country Link
CH (1) CH209561A (en)

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