CH143992A - Process for the preparation of a derivative of the anthanthrone. - Google Patents

Process for the preparation of a derivative of the anthanthrone.

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Publication number
CH143992A
CH143992A CH143992DA CH143992A CH 143992 A CH143992 A CH 143992A CH 143992D A CH143992D A CH 143992DA CH 143992 A CH143992 A CH 143992A
Authority
CH
Switzerland
Prior art keywords
blue
anthanthrone
red
derivative
preparation
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 CH143992A publication Critical patent/CH143992A/en

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

Description

  

  Verfahren zur Darstellung eines Derivates des     Anthanthrons.       Es wurde gefunden, dass man ein wert  volles Derivat des     Anthanthrons    erhalten kann,  wenn man     1@Tonoanrinoanthanthrorr,    wie es aus       Anthanthron    durch Nitrieren mit 95     o/oiger     Salpetersäure in siedendem Nitrobenzol und  Reduktion erhalten werden kann, dianotiert  und die erhaltene     Diazoverbindung    verkocht.  



  Das erhaltene     Monooxyanthanthron    löst  sich in konzentrierter Schwefelsäure mit grü  ner Farbe, in Alkali mit blaugrüner Farbe  und wird aus der alkalischen Lösung durch  Zugabe von Säure in Form rotvioletter Flocken  gefällt.  



  Es dient als     Farbstoff    oder als Zwischen  produkt zur Herstellung von     Farb"toffen    und  färbt Baumwolle aus blauroter     Küpe    in blau  roten Tönen, die mit Alkali nach blaugrün  umschlagen.    <I>Beispiel:</I>  32 Teile     Monoaminoanthanthron    (darge  stellt durch Reduktion des nach dein Verfah-    des Hauptpatentes     Nr.140417    erhältlichen     Mo-          nonitroanthanthrön    werden in Schwefelsäure  gelöst und in der üblichen Weise mit     Nitrose     (Lösung von     Na0a    in konzentrierter Schwe  felsäure) oder Nitrit dianotiert.

   Die erhaltene       Diazosulfatlösung    wird unter Rühren auf  <B>80-900</B> C erhitzt, wobei     Stickstoff    entweicht.  Man lässt erkalten, zersetzt mit Eis, saugt  ab und trocknet.



  Process for the preparation of a derivative of the anthanthrone. It has been found that a valuable derivative of anthanthrone can be obtained if 1 @ tonoanrinoanthanthrone, as can be obtained from anthanthrone by nitration with 95% nitric acid in boiling nitrobenzene and reduction, is dianotized and the diazo compound obtained is boiled off.



  The monooxyanthanthrone obtained dissolves in concentrated sulfuric acid with a green color, in alkali with a blue-green color and is precipitated from the alkaline solution in the form of red-violet flakes by adding acid.



  It is used as a dye or as an intermediate product for the production of dyes and dyes cotton from a blue-red vat in blue-red tones that turn blue-green with alkali Mononitroanthanthron obtainable according to your method of the main patent No. 140417 are dissolved in sulfuric acid and dianotized in the usual way with nitrous (solution of NaOa in concentrated sulfuric acid) or nitrite.

   The resulting diazo sulfate solution is heated to 80-900 ° C. with stirring, nitrogen escaping. It is allowed to cool, decomposed with ice, suction filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Deriva tes des Anthanthrons, dadurch gekennzeich net, dass man Monoaminoanthanthron, wie es aus Anthanthron durch Nitrieren mit 95 o/oiger Salpetersäure in siedendem Nitrobenzol und Reduktion erhalten werden kann, dianotiert und die erhaltene Diazoverbindung verkocht. Das erhaltene Monooxyanthanthron löst sich in konzentrierter Schwefelsäure mit grüner Farbe, in Alkali mit blaugrüner Farbe, und wird aus der alkalischen Lösung durch Zugabe von Säure in Form rotvioletter Flocken gefällt. Claim: method for the preparation of a derivative of anthanthrone, characterized in that monoaminoanthanthrone, as can be obtained from anthanthrone by nitration with 95% nitric acid in boiling nitrobenzene and reduction, is dianotized and the diazo compound obtained is boiled. The monooxyanthanthrone obtained dissolves in concentrated sulfuric acid with a green color, in alkali with a blue-green color, and is precipitated from the alkaline solution in the form of red-violet flakes by adding acid. Es dient als Farbstoff oder als Zwischenprodukt zur Herstellung von Farbstoffen und färbt Baumwolle aus blau- roter Küpe in blauroten Tönen, die mit Al kali nach blaugrün, umschlagen. It is used as a dye or as an intermediate product for the production of dyes and dyes cotton from a blue-red vat in blue-red tones that turn blue-green with alkali.
CH143992D 1928-07-28 1929-06-22 Process for the preparation of a derivative of the anthanthrone. CH143992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE143992X 1928-07-28

Publications (1)

Publication Number Publication Date
CH143992A true CH143992A (en) 1930-12-15

Family

ID=5669993

Family Applications (1)

Application Number Title Priority Date Filing Date
CH143992D CH143992A (en) 1928-07-28 1929-06-22 Process for the preparation of a derivative of the anthanthrone.

Country Status (1)

Country Link
CH (1) CH143992A (en)

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