CH257041A - Process for the preparation of a nitro dye. - Google Patents

Process for the preparation of a nitro dye.

Info

Publication number
CH257041A
CH257041A CH257041DA CH257041A CH 257041 A CH257041 A CH 257041A CH 257041D A CH257041D A CH 257041DA CH 257041 A CH257041 A CH 257041A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
nitro dye
brown
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 CH257041A publication Critical patent/CH257041A/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
    • C09B51/00—Nitro or nitroso dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 240226.         Verfahren    zur Herstellung eines     Nitrofarbstoffes.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung eines     Nitrofarb-          stoffes.    Das Verfahren ist dadurch gekenn  zeichnet,     dass    man     3',5'-Dinitro-4'-chlor-benzo-          phenon-2-carbonsäure    mit     4-Amino-diphenyl-          amin-2-sulfonsäure    umsetzt.  



  Der so erhaltene Farbstoff ist ein braunes  Pulver, das sich in Wasser mit brauner Farbe  löst und Wolle aus     saurem    Bade in orange  braunen Tönen von guter Lichtechtheit färbt.         Beispiel:       70,1 Teile     3',5'-Dinitro-4'-chlor-benzo-          phenon-2-carbonsäure    werden mit Soda in 500  Teilen Wasser neutral gelöst. Anderseits wer  den 52,8 Teile     4-Amino-diphenylamin-2-sul-          fonsäure    ebenfalls mit Soda     in    500 Teilen    Wasser neutral gelöst. Beide Lösungen wer  den vereinigt und nach Zugabe von 15 Teilen       calc.    Soda etwa 20 Stunden am     Rüekfluss     gekocht.

   Dann wird der gebildete Farbstoff  durch Zugabe von Kochsalz abgeschieden.



      Additional patent to main patent no. 240226. Process for the production of a nitro dye. The subject of the present patent is a process for the production of a nitro dye. The process is characterized in that 3 ', 5'-dinitro-4'-chloro-benzophenone-2-carboxylic acid is reacted with 4-aminodiphenylamine-2-sulfonic acid.



  The dye thus obtained is a brown powder which dissolves in water with a brown color and dyes wool from an acid bath in orange-brown shades of good lightfastness. Example: 70.1 parts of 3 ', 5'-dinitro-4'-chlorobenzophenone-2-carboxylic acid are dissolved neutrally in 500 parts of water with soda. On the other hand, the 52.8 parts of 4-aminodiphenylamine-2-sulphonic acid are also dissolved neutrally with soda in 500 parts of water. Both solutions who combined and calc after the addition of 15 parts. Soda boiled on the backflow for about 20 hours.

   Then the dye formed is deposited by adding common salt.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Nitrofarb- stoffes, dadurch gekennzeichnet, dass man 3', 5'-Dinitro - 4'- chlor-benzophenon - 2 - carbon- säure mit 4 - Amino - diphenylamin- 2 - sulfon- säure umsetzt. Der so erhaltene Farbstoff ist ein braunes Pulver, das sich in Wasser mit brauner Farbe löst und Wolle aus saurem Bade in orange braunen Tönen von guter Lichtechtheit färbt. PATENT CLAIM: Process for producing a nitro dye, characterized in that 3 ', 5'-dinitro-4'-chlorobenzophenone-2-carboxylic acid is reacted with 4-amino-diphenylamine-2-sulfonic acid. The dye thus obtained is a brown powder which dissolves in water with a brown color and dyes wool from an acid bath in orange-brown shades of good lightfastness.
CH257041D 1943-10-11 1943-10-11 Process for the preparation of a nitro dye. CH257041A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH257041T 1943-10-11
CH240226T 1943-10-11

Publications (1)

Publication Number Publication Date
CH257041A true CH257041A (en) 1948-09-15

Family

ID=25728502

Family Applications (1)

Application Number Title Priority Date Filing Date
CH257041D CH257041A (en) 1943-10-11 1943-10-11 Process for the preparation of a nitro dye.

Country Status (1)

Country Link
CH (1) CH257041A (en)

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