CH111931A - Process for the preparation of a vat dye from nitrodibenzanthrone. - Google Patents

Process for the preparation of a vat dye from nitrodibenzanthrone.

Info

Publication number
CH111931A
CH111931A CH111931DA CH111931A CH 111931 A CH111931 A CH 111931A CH 111931D A CH111931D A CH 111931DA CH 111931 A CH111931 A CH 111931A
Authority
CH
Switzerland
Prior art keywords
blue
preparation
black
nitrodibenzanthrone
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Farbwerke Vorm Meiste Bruening
Original Assignee
Hoechst 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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH111931A publication Critical patent/CH111931A/en

Links

Landscapes

  • Coloring (AREA)

Description

  

      Verfahren    zur Darstellung eines     Küpenfarbstoffes    aus     Nitrodibenzanthron.       In dem Hauptpatent wurde gezeigt, dass       Nitrodibenzanthronyl    durch     Kalischmelze    in  einen wertvollen     Küpenfarbstoff    übergeht.  



  Es wurde weiter gefunden, dass man einen  ganz ähnlichen Farbstoff erhält, wenn man  an Stelle des     Nitrodibenzanthronyls        Nitro.di-          benzanthron    :der     Kalischmelze    unterwirft.  Man erhält eine blauschwarz gefärbte Paste,  in trockenem Zustand ein schwarzes Pulver,  das sich in konzentrierter     Schwefelsäure     mit blauer Farbe löst.

           Beispiel:     15 Teile     Mononitrodib.enzanthron    (im Han  del unter der Bezeichnung     Indanthrenschwarz     2B     bekannt)    werden bei<B>160'</B> in ein Gemisch  von<B>150</B> Teilen     Ätzkali    und 75 Teilen Alko  hol eingetragen, .die Schmelze kurze Zeit bei  <B>180'</B> verrührt und dann weiter     auf    225 bis  230   erhitzt. Nach etwa     einer    halben .Stunde  wird abgekühlt, in Wasser .gelöst, zur Oxy  dation von     Leukoverbindung    Luft einge  blasen, filtriert und gewaschen.

   Man erhält    eine blauschwarz     gefärbte    Paste, in trockenem  Zustand ein schwarzes Pulver, das sich in  konzentrierter Schwefelsäure mit blauer  Farbe löst. Der Farbstoff färbt aus violetter  alkalischer     Hydrosulfitküpe    Baumwolle in  graublauen bis schwarzen Tönen von sehr  guter Echtheit.



      Process for the preparation of a vat dye from nitrodibenzanthrone. The main patent showed that nitrodibenzanthronyl is converted into a valuable vat dye by melting potash.



  It has also been found that a very similar dye is obtained if, instead of nitrodibenzanthronyl, nitro.dibenzanthron: is subjected to potash melt. A blue-black colored paste is obtained, in the dry state a black powder which dissolves in concentrated sulfuric acid with a blue color.

           Example: 15 parts of Mononitrodib.enzanthron (known in the trade as Indanthrenschwarz 2B) are added to <B> 160 '</B> in a mixture of <B> 150 </B> parts of caustic potash and 75 parts of alcohol, .the melt stirred for a short time at <B> 180 '</B> and then further heated to 225 to 230. After about half an hour, the mixture is cooled, dissolved in water, blown in air to oxidize the leuco compound, filtered and washed.

   A blue-black colored paste is obtained, in the dry state a black powder which dissolves in concentrated sulfuric acid with a blue color. The dye dyes cotton from a violet alkaline hydrosulfite vat in gray-blue to black shades of very good fastness.

Claims (1)

PATEN? TANSPRUCH Verfahren zur Darstellung eines neuen Küpenfarbstoffes, dadurch gekennzeichnet, dass Mononitrodibenzanthron -mit alkalischen Kondensationsmitteln behandelt wird. Man erhält eine blauschwarz gefärbte Paste, in trockenem Zustand ein schwarzes Pulver, .das sich in konzentrierter Schwefelsäure mit blauer Farbe löst. Der Farbstoff färbt aus violetter, alkalischer Hydrosulfitküpe Baum wolle in graublauen bis schwarzen Tönen von sehr guter Echtheit. PATEN? CLAIM Process for the preparation of a new vat dye, characterized in that mononitrodibenzanthrone is treated with alkaline condensation agents. A blue-black colored paste is obtained, in the dry state a black powder, which dissolves in concentrated sulfuric acid with a blue color. The dye dyes cotton from a violet, alkaline hydrosulfite vat in gray-blue to black shades of very good fastness.
CH111931D 1923-08-21 1924-04-19 Process for the preparation of a vat dye from nitrodibenzanthrone. CH111931A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE111931X 1923-08-21
CH109707T 1924-04-19

Publications (1)

Publication Number Publication Date
CH111931A true CH111931A (en) 1925-09-16

Family

ID=25707607

Family Applications (1)

Application Number Title Priority Date Filing Date
CH111931D CH111931A (en) 1923-08-21 1924-04-19 Process for the preparation of a vat dye from nitrodibenzanthrone.

Country Status (1)

Country Link
CH (1) CH111931A (en)

Similar Documents

Publication Publication Date Title
CH111931A (en) Process for the preparation of a vat dye from nitrodibenzanthrone.
DE568034C (en) Process for the production of condensation products
DE436538C (en) Process for the preparation of Kuepen dyes
AT61471B (en) Process for the preparation of β-phenoxylated wool dyes.
DE451549C (en) Process for the preparation of green-coloring, sulphurous cow dyes
DE457121C (en) Process for the preparation of condensation products from benzobenzanthrone carboxylic acids
DE857844C (en) Process for the production of Kuepen dyes
CH183384A (en) Process for the production of an anthraquinone derivative.
CH122275A (en) Process for the preparation of a violet vat dye of the 2-thionaphthene-2-indolindigo series.
CH137954A (en) Process for the production of a new vat dye.
CH157666A (en) Process for the production of a condensation product.
CH141317A (en) Process for the preparation of a brown vat dye.
CH148373A (en) Process for the preparation of a vat dye.
CH133699A (en) Process for the preparation of dichloroisodibenzanthrone.
CH150799A (en) Process for the preparation of a dye of the anthraquinone series.
CH118722A (en) Process for the preparation of a vat dye.
CH148985A (en) Process for the preparation of a vat dye.
CH198150A (en) Process for the production of a vat dye.
CH100390A (en) Process for the preparation of a dye.
CH181531A (en) Process for the preparation of a vat dye of the anthraquinone acridone series.
CH122281A (en) Process for the preparation of a violet vat dye of the 2 - thionaphtene - 2 - indolindigo series.
CH258768A (en) Process for the production of a new vat dye.
CH121497A (en) Process for the production of a new vat dye.
CH125878A (en) Process for the preparation of a violet vat dye of the 2-thionaphthene-2-indolindigo series.
CH132921A (en) Process for the preparation of a new vat dye.