CH151167A - Process for the preparation of a wool dye. - Google Patents

Process for the preparation of a wool dye.

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Publication number
CH151167A
CH151167A CH151167DA CH151167A CH 151167 A CH151167 A CH 151167A CH 151167D A CH151167D A CH 151167DA CH 151167 A CH151167 A CH 151167A
Authority
CH
Switzerland
Prior art keywords
preparation
wool
parts
dye
sulfonic acid
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 CH151167A publication Critical patent/CH151167A/en

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Description

  

  Verfahren zur Darstellung eines     Wollfarbstoffes.       Wie gefunden wurde, gelangt man zu,  einem neuen wertvollen Farbstoff, der Wolle  in     rötlichbraunen,    gut egalisierenden Tönen  von sehr guter Lichtechtheit färbt, wenn  man 1     hIol.    4'     Athoxy-2    .

       6-diaminodiphenyl-          amin-4-sulfosäure    mit 1     Mol.        2.4.6-Tri-          nitro-l-chlorbenzol        kondensiert.    Hierbei fin  det zunächst die zu erwartende Reaktion zwi  schen dem Chloratom und einer     Amino-          Kruppe    statt, bei weiterem Erhitzen in       Geo-enwart    von Alkali tritt dann aber unter  Abspaltung von     Alkalinitrit    eine innere Kon  densation ein.  



       Beispiel:     32,3 Teile     4'-Äthoxy-2.6-diaminodiphe-          nylamin-4-sulfosäure,    erhalten durch Kon  densation von 2.     6-Dinitrochlorbenzol-4-sulfo-          säure    mit     p-Phenetidin    und folgende Reduk  tion der Nitrogruppen, werden in 500 Teilen       1ATasser    neutral gelöst und bei 70 bis 80    mit 24 Teilen     2.4.6-Trinitrochlorbenzol,     welches man allmählich unter Rühren zu-    gibt, kondensiert.

   Gleichzeitig lässt man eine  Lösung von 11 Teilen Natriumkarbonat in  110 Teilen Wasser     zutropfen.    Nachdem alles       Trinitrochlorbenzol    umgesetzt ist, gibt man  noch 6 Teile     Natriumkarbonat    hinzu und er  hitzt eine Stunde auf<B>90'.</B> Der Farbstoff  wird durch     Aussalzen    abgeschieden und ge  trocknet. 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 reddish-brown, well-leveling shades of very good fastness to light, if one hIol. 4 'athoxy-2.

       6-diaminodiphenylamine-4-sulfonic acid condensed with 1 mol. 2.4.6-tri-nitro-1-chlorobenzene. In this case, the expected reaction 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 the elimination of alkali metal nitrite.



       Example: 32.3 parts of 4'-ethoxy-2,6-diaminodiphenylamine-4-sulfonic acid, obtained by condensation of 2. 6-dinitrochlorobenzene-4-sulfonic acid with p-phenetidine and the following reduction of the nitro groups, are in 500 parts of 1A water dissolved in a neutral state and condensed at 70 to 80 with 24 parts of 2,4,6-trinitrochlorobenzene, which is gradually added with stirring.

   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 it is heated to <B> 90 'for one hour. </B> The dye is separated out by salting out and dried. It forms a black powder.

Claims (1)

PATENTANSPRUCH: Zerfahren zur Darstellung eines Wolle in rötlichbraunen, gut egalisierenden und sehr lichtechten Tönen färbenden Farbstoffes, da durch gekennzeichnet, dass man auf 1 Mol. 4'-Athoxy-2. 6-diaminodiphenylamin-4-sulf o- säure 1 Mol. 2.4.6-Trinitro-l-ohlorbenzol einwirken lässt und. das zunächst gebildete Kondensationsprodukt in Gegenwart von Alkali erhitzt. PATENT CLAIM: Process for the representation of a wool in reddish-brown, well-leveling and very lightfast coloring shades, characterized by the fact that one mole of 4'-ethoxy-2. 6-diaminodiphenylamine-4-sulfonic acid 1 mol. 2.4.6-trinitro-l-chlorobenzene can act and. the condensation product initially formed is heated in the presence of alkali.
CH151167D 1929-08-17 1930-03-12 Process for the preparation of a wool dye. CH151167A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE151167X 1929-08-17
CH147460T 1931-06-15

Publications (1)

Publication Number Publication Date
CH151167A true CH151167A (en) 1931-11-30

Family

ID=25715035

Family Applications (1)

Application Number Title Priority Date Filing Date
CH151167D CH151167A (en) 1929-08-17 1930-03-12 Process for the preparation of a wool dye.

Country Status (1)

Country Link
CH (1) CH151167A (en)

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