CH310692A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH310692A
CH310692A CH310692DA CH310692A CH 310692 A CH310692 A CH 310692A CH 310692D A CH310692D A CH 310692DA CH 310692 A CH310692 A CH 310692A
Authority
CH
Switzerland
Prior art keywords
azo dye
weight
parts
acid
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Farbwerke Hoechst Akt Bruening
Original Assignee
Hoechst 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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH310692A publication Critical patent/CH310692A/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
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/12—Disazo dyes from other coupling components "C"
    • C09B31/14—Heterocyclic components
    • C09B31/143—1,2-Diazoles
    • C09B31/147—Pyrazoles

Landscapes

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

Description

  

  Zusatzpatent zum Hauptpatent Nr. 301813.    Verfahren zur     Herstellung    eines     Azofarbstoffes.       Gegenstand des     vorliegendenZusatzpaten-          tes    ist ein Verfahren zur Herstellung eines       Azofarbstoffes,    welches dadurch gekennzeich  net ist,

   dass man die     Diazoniumverbindung     des durch     Kuppeln    von     diazotierter        1-Amino-          benzol-4-sulfonsäure    mit     4-Amino-2-oxy-ben-          zol-l-carbonsäure    erhaltenen     AzofarbstofFes     mit     1-Phenyl-3-rnethyl-5-pyrazolonvereinigt.            Beispiel:

         196 Gewichtsteile einer     88,4%igen    1  Aminobenzol-4-sulfonsäure werden mit 280  Gewichtsteilen Salzsäure von 24      B6    und  69     Gewichtsteilen        Natriumnitrit        diazotiert     und mit einer Lösung von 153 Gewichtsteilen       4-Amino-2-oxybenzol-l-carbonsäure    in 165  Gewichtsteilen     Ätznatron    und 500 Gewichts  teilen Wasser zum     Azofarbstoff    vereinigt.  Die geklärte     Farbstofflösung    wird mit 69  Gewichtsteilen     Natriumnitrit    versetzt und bei  0  C zu 375 Gewichtsteilen Salzsäure von  24      B6    gegeben.

   Die klare     Diazolösung    lässt  man nun zu einer Lösung von 174 Gewichts  teilen     1-Phenyl-3-methyl-5-pyrazolon    in 165  Gewichtsteilen     Ätznatron    und 500 Gewichts  teilen Wasser fliessen. Nach beendeter Kupp  lung wird     mit    190 Gewichtsteilen Salzsäure    von 24      B6    angesäuert, der gebildete Farb  stoff mit Kochsalz     ausgesalzen,    abgesaugt,       mit    Kochsalzlösung gewaschen und getrock  net.  



  Das so erhaltene Produkt stellt ein braunes  Pulver dar, das Wolle aus saurem Bade in  gelbbraunen Tönen färbt, die beim     Nach-          chromieren    in kräftige Brauntöne von guten  Echtheitseigenschaften, insbesondere von  guter     Dekatur-,        Carbonisier-,        Alkali-    und  Lichtechtheit übergehen.



  Additional patent to main patent No. 301813. Process for the production of an azo dye. The subject of this additional patent is a process for the production of an azo dye, which is characterized by

   that the diazonium compound of the azo dye obtained by coupling diazotized 1-amino-benzene-4-sulfonic acid with 4-amino-2-oxy-benzene-1-carboxylic acid is combined with 1-phenyl-3-methyl-5-pyrazolone. Example:

         196 parts by weight of an 88.4% 1 aminobenzene-4-sulfonic acid are diazotized with 280 parts by weight of hydrochloric acid of 24 B6 and 69 parts by weight of sodium nitrite and with a solution of 153 parts by weight of 4-amino-2-oxybenzene-1-carboxylic acid in 165 parts by weight of caustic soda and 500 parts by weight of water combined to form the azo dye. The clarified dye solution is mixed with 69 parts by weight of sodium nitrite and added at 0 ° C. to 375 parts by weight of 24 B6 hydrochloric acid.

   The clear diazo solution is now allowed to flow into a solution of 174 parts by weight of 1-phenyl-3-methyl-5-pyrazolone in 165 parts by weight of caustic soda and 500 parts by weight of water. After the coupling is complete, it is acidified with 190 parts by weight of hydrochloric acid of 24 B6, the dye formed is salted out with sodium chloride, filtered off with suction, washed with sodium chloride solution and dried.



  The product obtained in this way is a brown powder which dyes wool from an acid bath in yellow-brown shades which, when chromium-plated, change into strong brown shades with good fastness properties, in particular good decatur, carbonization, alkali and light fastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man . die Diazoniumverbindung des durch Kup peln von diazotierter 1-Aminobenzol-4-sul- fonsäure mit 4-Amino-2-oxybenzol-l-carbon- säure erhaltenen Azofarbstoffes mit 1-Phenyl- 3-methyl-5-pyrazolon vereinigt. PATENT CLAIM: Process for the production of an azo dye, characterized in that one. the diazonium compound of the azo dye obtained by coupling diazotized 1-aminobenzene-4-sulphonic acid with 4-amino-2-oxybenzene-1-carboxylic acid is combined with 1-phenyl-3-methyl-5-pyrazolone. Das so erhaltene Produkt stellt ein braunes Pulver dar, das Wolle aus saurem Bade in gelbbraunen Tönen färbt, die bei Nach- chrornieren in kräftige Brauntöne von guten Echtheitseigenschaften, insbesondere von guter Dekatur-, Carbonisier-, Alkali- und Lichtechtheit übergehen. The product obtained in this way is a brown powder which dyes wool from an acid bath in yellow-brown shades which, on post-chromium treatment, change into strong brown shades with good fastness properties, in particular good decatur, carbonization, alkali and light fastness.
CH310692D 1950-10-18 1951-09-27 Process for the preparation of an azo dye. CH310692A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE310692X 1950-10-18
CH301813T 1951-09-27

Publications (1)

Publication Number Publication Date
CH310692A true CH310692A (en) 1955-10-31

Family

ID=25734438

Family Applications (1)

Application Number Title Priority Date Filing Date
CH310692D CH310692A (en) 1950-10-18 1951-09-27 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH310692A (en)

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