[go: up one dir, main page]

CH144868A - Process for the preparation of a nitrogenous vat dye. - Google Patents

Process for the preparation of a nitrogenous vat dye.

Info

Publication number
CH144868A
CH144868A CH144868DA CH144868A CH 144868 A CH144868 A CH 144868A CH 144868D A CH144868D A CH 144868DA CH 144868 A CH144868 A CH 144868A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
nitrogenous
vat dye
vat
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 CH144868A publication Critical patent/CH144868A/en

Links

Landscapes

  • Coloring (AREA)

Description

  

      Verfabren    zur Darstellung eines     stielistoffhaltigen        ltüpenfarbstoffes.       Es wurde gefunden, dass man einen neuen,  wertvollen, stickstoffhaltigen     Küpenfarbstoff     erhält, wenn man ein in der     Bzl-Stellung     negativ substituiertes 2.     N-Pyrazolanthronyl-          benzanthron    (erhalten zum Beispiel durch  Kondensation von     Pyrazolanthron    mit einem  in     Bzl-Stellung    negativ substituierten     2-          Halogenbenzanthron)    mit einem alkalischen  Kondensationsmittel behandelt.

   Hierbei wird  der in     Bzl-Stellung    befindliche negative     Sub-          stituent    abgespalten.  



  Der erhaltene Farbstoff löst sich in kon  zentrierter Schwefelsäure mit blauer Farbe  und färbt Baumwolle aus blauer     Küpe    in  klaren     rotstichig    violetten Tönen.  



       Beispiel:     20 Teile     2-N-Pyrazolanthronyl-Bzl-nitro-          benzanthron,    erhalten     zumBeispiel    durch Kon  densation von     2-Chlor-Bzl-nitrobenzanthron     (hellbraune Blättchen aus Nitrobenzol),  werden in eine 110   C heisse Mischung von  <B>200</B> Teilen     Ätzkali    und 200 Teilen Äthyl-         alkohol    eingetragen. Man rührt so lange bei  dieser Temperatur, bis die     Farbstoffbildung     beendet ist. Der Farbstoff wird durch Ein  giessen der Schmelze in Wasser und Einlei  ten von Luft in die alkalische Flüssigkeit  in der üblichen Weise aufgearbeitet.



      Procedure for the representation of an oiltip dye containing stems. It has been found that a new, valuable, nitrogen-containing vat dye is obtained if a second N-pyrazolanthronylbenzanthrone which is negatively substituted in the Bzl position (obtained, for example, by condensation of pyrazolanthrone with a 2- Halobenzanthrone) treated with an alkaline condensing agent.

   The negative substituent in the Bzl position is split off here.



  The dye obtained dissolves in concentrated sulfuric acid with a blue color and dyes cotton from a blue vat in clear reddish violet shades.



       Example: 20 parts of 2-N-pyrazolanthronyl-Bzl-nitrobenzanthrone, obtained for example by condensation of 2-chloro-Bzl-nitrobenzanthrone (light brown flakes from nitrobenzene), are poured into a 110 C hot mixture of <B> 200 </ B> parts of caustic potash and 200 parts of ethyl alcohol entered. The mixture is stirred at this temperature until the formation of the dye has ended. The dye is worked up in the usual way by pouring the melt into water and introducing air into the alkaline liquid.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines stick stoffhaltigen Küpenfarbstoffes, dadurch ge kennzeichnet, dass man ein in der Bzl-Stel- lung negativ substituiertes- 2 . N-Pyrazol- anthronylbenzanthron mit einem alkalischen Kondensationsmittel behandelt. Der erhaltene Farbstoff löst sich in kon zentrierter Schwefelsäure mit blauer Farbe und färbt Baumvolle aus blauer Küpe in klaren rotstichig violetten Tönen. PATENT CLAIM: Process for the preparation of a nitrogen-containing vat dye, characterized in that a negatively substituted in the Bzl position is used. N-Pyrazol- anthronylbenzanthrone treated with an alkaline condensation agent. The dye obtained dissolves in concentrated sulfuric acid with a blue color and dyes trees from a blue vat in clear reddish purple tones.
CH144868D 1928-11-13 1929-09-28 Process for the preparation of a nitrogenous vat dye. CH144868A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE144868X 1928-11-13

Publications (1)

Publication Number Publication Date
CH144868A true CH144868A (en) 1931-01-31

Family

ID=5670449

Family Applications (1)

Application Number Title Priority Date Filing Date
CH144868D CH144868A (en) 1928-11-13 1929-09-28 Process for the preparation of a nitrogenous vat dye.

Country Status (1)

Country Link
CH (1) CH144868A (en)

Similar Documents

Publication Publication Date Title
CH144868A (en) Process for the preparation of a nitrogenous vat dye.
CH149613A (en) Process for the preparation of a nitrogenous vat dye.
DE497825C (en) Process for the preparation of nitrogenous cow dyes
DE475342C (en) Process for the preparation of Kuepen dyes
CH155335A (en) Process for the production of a nitrogenous vat dye.
CH149907A (en) Process for the preparation of a vat dye.
CH147045A (en) Process for the preparation of a vat dye.
CH147044A (en) Process for the preparation of a vat dye.
CH120716A (en) Process for the preparation of isodibenzanthrone.
CH198150A (en) Process for the production of a vat dye.
CH180297A (en) Process for the production of a new dye.
CH176633A (en) Process for the preparation of an aminodinaphthylene oxide.
CH193259A (en) Process for the production of an acidic wool dye.
CH178432A (en) Process for the preparation of a dye.
CH183384A (en) Process for the production of an anthraquinone derivative.
CH149617A (en) Process for the production of a vat dye.
CH120706A (en) Process for the preparation of isodibenzanthrone.
CH137470A (en) Process for the preparation of a vat dye.
CH224548A (en) Process for the preparation of a new dye of the anthraquinone series.
CH137116A (en) Process for the preparation of a nitrogenous vat dye of the benzanthrone series.
CH142160A (en) Process for the preparation of a new dye of the triphenylmethane series.
CH124353A (en) Process for the preparation of a vat dye.
CH183894A (en) Process for the preparation of a dye.
CH183896A (en) Process for the preparation of a dye.
CH171957A (en) Process for the preparation of a new dye of the anthraquinone series.