CH293003A - Process for the preparation of a nitro dye. - Google Patents

Process for the preparation of a nitro dye.

Info

Publication number
CH293003A
CH293003A CH293003DA CH293003A CH 293003 A CH293003 A CH 293003A CH 293003D A CH293003D A CH 293003DA CH 293003 A CH293003 A CH 293003A
Authority
CH
Switzerland
Prior art keywords
nitro
preparation
nitro dye
dye
weight
Prior art date
Application number
Other languages
German (de)
Inventor
Michael Dr Erlenbach
Adolf Dr Sieglitz
Original Assignee
Michael Dr Erlenbach
Adolf Dr Sieglitz
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 Michael Dr Erlenbach, Adolf Dr Sieglitz filed Critical Michael Dr Erlenbach
Publication of CH293003A publication Critical patent/CH293003A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren     zur        Herstellung    eines Nitrofarbstoffes.    Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung eines  Nitrofarbstoffes, welches dadurch gekenn  zeichnet ist, dass man     1-Halogen-2-nitro-4-          trifluormethylbenzol    mit     4-Aminodiphenyl-          äther-2-sulfonsäure    kondensiert.

      <I>Beispiel:</I>  In einen     Autoklaven    werden 11 Gewichts  teile     Natriumcarbonat,    54     Gewiehtsteile        4-          @lminodiphenyläther    - 2 -     sulfonsäure,    45 Ge  wichtsteile     1-Chlor-2-nitro-4-trifluormethyl-          ben7ol,    40 Gewichtsteile Schlämmkreide und  \?00 Gewichtsteile Wasser verrührt. Dann  wird mehrere Stunden bei einer Temperatur  von l20  C weiter gerührt, bis die Umsetzung  beendet ist.

   Danach wird die verdünnte,       seliwaeh        alkaliseh    gestellte Lösung geklärt und       der    Farbstoff     ausgesalzen.     



  An Stelle von Wasser kann auch Alkohol  verwendet werden. In gleicher Weise     kann       auch     1-Brom-2-nitro-4-trifluormethylbenzol     eingesetzt werden.  



  Das so erhaltene Produkt stellt ein gelbes  kristallines Pulver dar, das Wolle in     rotstichig     gelben Tönen von guten Echtheitseigenschaf  ten, insbesondere von sehr guter Lichtechtheit,  färbt.



  Process for the preparation of a nitro dye. The subject of the present additional patent is a process for the production of a nitro dye, which is characterized in that 1-halo-2-nitro-4-trifluoromethylbenzene is condensed with 4-aminodiphenyl ether-2-sulfonic acid.

      <I> Example: </I> In an autoclave are 11 parts by weight of sodium carbonate, 54 parts by weight of 4- @ lminodiphenyl ether - 2 - sulfonic acid, 45 parts by weight of 1-chloro-2-nitro-4-trifluoromethylben7ol, 40 parts by weight of chalk and \? 00 parts by weight of water stirred. Stirring is then continued for several hours at a temperature of 120 ° C. until the reaction has ended.

   Then the diluted, seliwaeh alkaline solution is clarified and the dye is salted out.



  Instead of water, alcohol can also be used. 1-Bromo-2-nitro-4-trifluoromethylbenzene can also be used in the same way.



  The product thus obtained is a yellow crystalline powder which dyes wool in reddish yellow tones with good fastness properties, in particular very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Nitro- farbstoffes, dadurch gekennzeichnet, dass man 1-Halogen-2-nitro-4-trifltlormethylbenzol mit 4-Aminodiphenyläther-2-stdfonsäure konden siert. Das so erhaltene Produkt stellt ein gelbes kristallines Pulver dar, das Wolle in rotstichig gelben Tönen von guten Echtheitseigenschaf ten, insbesondere von sehr guter Lichteehtheit, färbt. Claim: Process for the production of a nitro dye, characterized in that 1-halo-2-nitro-4-trifloromethylbenzene is condensed with 4-aminodiphenyl ether-2-stdfonic acid. The product obtained in this way is a yellow crystalline powder which dyes wool in reddish yellow shades with good fastness properties, in particular very good lightfastness.
CH293003D 1949-11-07 1950-10-17 Process for the preparation of a nitro dye. CH293003A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE293003X 1949-11-07
CH289072T 1950-10-17

Publications (1)

Publication Number Publication Date
CH293003A true CH293003A (en) 1953-08-31

Family

ID=25732859

Family Applications (1)

Application Number Title Priority Date Filing Date
CH293003D CH293003A (en) 1949-11-07 1950-10-17 Process for the preparation of a nitro dye.

Country Status (1)

Country Link
CH (1) CH293003A (en)

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