CH151161A - Process for the preparation of a wool dye. - Google Patents

Process for the preparation of a wool dye.

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Publication number
CH151161A
CH151161A CH151161DA CH151161A CH 151161 A CH151161 A CH 151161A CH 151161D A CH151161D A CH 151161DA CH 151161 A CH151161 A CH 151161A
Authority
CH
Switzerland
Prior art keywords
preparation
parts
wool
dye
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 CH151161A publication Critical patent/CH151161A/en

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

Description

  

  Verfahren     zur    Darstellung eines     Wollfarbstoffes.       Wie gefunden wurde, gelangt man zu  einem neuen wertvollen Farbstoff, der Wolle  in braunen, gut egalisierenden Tönen von  sehr guter Lichtechtheit färbt, wenn man  1     Mol.        3'-Methyl-2.        6-diaminodiphenylamin-          4-sulfosäure    mit 1     Mol.        2.4.6-Trinitro-1-          chlorbenzol    kondensiert.

   Hierbei findet zu  nächst die zu erwartende Reaktion     zwischen     dem Chloratom und einer     Aminogruppe     statt, bei weiterem Erhitzen in Gegenwart  von Alkali tritt dann aber unter     Abspaltung     von     Alkalinitrit    eine innere     Kondensation     ein.  



       Beispiel:     29,3 Teile     3'-Methyl-2.6-diaminodiphe-          nylamin-4-sulfosäure,    erhalten durch Kon  densation von 2. 6 -     Dinitrochlorbenzol    - 4     -          sulfosäure    mit     m-Toluidin    und folgende Re  duktion der     Nitrogruppen,        werden    in 500  Teilen Wasser neutral gelöst und bei 70 bis  80   mit 24 Teilen 2. 4.     6-Trinitrochlorben-          zol,    welches man allmählich unter Rühren    zugibt, kondensiert.

   Gleichzeitig lässt man  eine Lösung von 11 Teilen     Natriumkarbonat     in 110 Teilen Wasser     zutropfea-    Nachdem  alles     Trinitrochlorbenzol    umgesetzt ist, gibt  man noch 6 Teile     Natriumkarbonat    hinzu  und erhitzt eine Stunde auf 90  . Der Farb  stoff wird durch     Aussalzen    abgeschieden und       getrocknet.    Er bildet ein schwarzes Pulver.



  Process for the preparation of a wool dye. As has been found, one arrives at a new valuable dye which dyes wool in brown, well-leveling shades of very good lightfastness, if one mole of 3'-methyl-2. 6-diaminodiphenylamine-4-sulfonic acid condensed with 1 mol. 2.4.6-trinitro-1-chlorobenzene.

   In this case, the reaction to be expected between the chlorine atom and an amino group takes place first, but with further heating in the presence of alkali, internal condensation then occurs with elimination of alkali metal nitrite.



       Example: 29.3 parts of 3'-methyl-2,6-diaminodiphenylamine-4-sulfonic acid, obtained by condensation of 2.6 - dinitrochlorobenzene - 4 - sulfonic acid with m-toluidine and the following reduction of the nitro groups, are in 500 parts Water dissolved neutrally and at 70 to 80 with 24 parts of 2-4 parts of 6-trinitrochlorobenzene, which is gradually added with stirring, condensed.

   At the same time, a solution of 11 parts of sodium carbonate in 110 parts of water is added dropwise. After all of the trinitrochlorobenzene has reacted, 6 parts of sodium carbonate are added and the mixture is heated to 90 for one hour. The dye is deposited by salting out and dried. It forms a black powder.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Wolle in braunen, gut egalisierenden und sehr licht echten Tönen färbenden Farbstoffes, dadurch gekennzeichnet, dass man auf 1 Mol. 3'-Me- thyl-2. 6-diaminodiphenylamin-4-sulfo-säure 1 Mol. 2. 4. 6-Trinitro-l-chlorbenzol einwir ken lässt und das zunächst gebildete Konden sationsprodukt in Gegenwart von Alkali er hitzt. PATENT CLAIM: Process for the representation of a wool in brown, good leveling and very light-fast tones coloring dye, characterized in that 1 mol. 3'-methyl-2. 6-diaminodiphenylamine-4-sulfo-acid 1 mol. 2. 4. 6-trinitro-1-chlorobenzene can act and the condensation product initially formed is heated in the presence of alkali.
CH151161D 1929-08-17 1930-03-12 Process for the preparation of a wool dye. CH151161A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE151161X 1929-08-17
CH147460T 1931-06-15

Publications (1)

Publication Number Publication Date
CH151161A true CH151161A (en) 1931-11-30

Family

ID=25715029

Family Applications (1)

Application Number Title Priority Date Filing Date
CH151161D CH151161A (en) 1929-08-17 1930-03-12 Process for the preparation of a wool dye.

Country Status (1)

Country Link
CH (1) CH151161A (en)

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