CH257039A - Process for the preparation of a nitro dye. - Google Patents

Process for the preparation of a nitro dye.

Info

Publication number
CH257039A
CH257039A CH257039DA CH257039A CH 257039 A CH257039 A CH 257039A CH 257039D A CH257039D A CH 257039DA CH 257039 A CH257039 A CH 257039A
Authority
CH
Switzerland
Prior art keywords
nitro
preparation
brown
nitro dye
dye
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 CH257039A publication Critical patent/CH257039A/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)

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'-Nitro-4'-chlor-benzo-          phenon-2-carbonsäure    mit     4-Amino-diphenyl-          amin-2-sulfonsäure    umsetzt.  



  Der so erhaltene     Farbstoff    ist ein dunkel  braunes Pulver, das sich in Wasser mit     braun-          oranger    Farbe löst und Wolle aus saurem  Bade in braunorangen Tönen von guter Licht  echtheit färbt.  



  <I>Beispiel:</I>  61,1 Teile     3'-Nitro-4'-chlor-benzophenon-          2-carbonsäure    werden mit Soda in 500 Teilen  Wasser neutral gelöst. Anderseits werden  52,8 Teile     4-Amino-diphenylamin-2-sulfon-          säure    ebenfalls     mit    Soda in 500 Teilen Was-         ser    neutral gelöst.     Beide        Lösungen    werden  vereinigt und nach Zugabe von 15 Teilen     calc.     Soda :etwa 20 Stunden am     Rückfluss    gekocht.  Dann     wird,der    gebildete Farbstoff durch Zu  gabe 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'-nitro-4'-chlorobenzophenone-2-carboxylic acid is reacted with 4-aminodiphenylamine-2-sulfonic acid.



  The dye obtained in this way is a dark brown powder which dissolves in water with a brown-orange color and dyes wool from an acid bath in brown-orange shades with good lightfastness.



  <I> Example: </I> 61.1 parts of 3'-nitro-4'-chloro-benzophenone-2-carboxylic acid are dissolved neutrally in 500 parts of water with soda. On the other hand, 52.8 parts of 4-aminodiphenylamine-2-sulfonic acid are also dissolved in 500 parts of water in a neutral manner using soda. Both solutions are combined and, after adding 15 parts of calc. Soda: refluxed for about 20 hours. Then the dye formed is deposited by adding sodium chloride.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines. Nitrofarb- stoffes, dadurch gekennzeichnet, dass man 3' Nitro-4'-chlor-benzophenon-2-carbonsäure mit 4-Amino-diphenylamin-2-sulfonsäure umsetzt. Der so erhaltene Farbstoff ist ein dunkel braunes Pulver, das sich in Wasser mit braun oranger Farbe löst und Wolle aus saurem .Bade in braunorangen Tönen von guter Licht echtheit färbt. PATENT CLAIM: Process for producing a. Nitro dyes, characterized in that 3 'nitro-4'-chloro-benzophenone-2-carboxylic acid is reacted with 4-amino-diphenylamine-2-sulfonic acid. The dye obtained in this way is a dark brown powder which dissolves in water with a brown-orange color and dyes wool from acidic baths in brown-orange shades of good lightfastness.
CH257039D 1943-10-11 1943-10-11 Process for the preparation of a nitro dye. CH257039A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH240226T 1943-10-11
CH257039T 1943-10-11

Publications (1)

Publication Number Publication Date
CH257039A true CH257039A (en) 1948-09-15

Family

ID=25728500

Family Applications (1)

Application Number Title Priority Date Filing Date
CH257039D CH257039A (en) 1943-10-11 1943-10-11 Process for the preparation of a nitro dye.

Country Status (1)

Country Link
CH (1) CH257039A (en)

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