CH121569A - Process for the preparation of a new benzanthrone derivative. - Google Patents

Process for the preparation of a new benzanthrone derivative.

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Publication number
CH121569A
CH121569A CH121569DA CH121569A CH 121569 A CH121569 A CH 121569A CH 121569D A CH121569D A CH 121569DA CH 121569 A CH121569 A CH 121569A
Authority
CH
Switzerland
Prior art keywords
new
preparation
dyes
silk
benzanthrone derivative
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 CH121569A publication Critical patent/CH121569A/en

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Description

  

  Verfahren zur Darstellung eines neuen     Benzanthronderivates.       Es wurde gefunden, dass man zu einem  wertvollen Derivat des     Benzanthrons    gelangt,  wenn man     Bz-1-Nitrobenzanthron    mit einem       Alkalisulfit    behandelt. Die neue Verbindung  ist wasserlöslich und stellt eine     Sulfosäure     des     Aminobenzanthrons    dar, welcher wahr  scheinlich die Formel:  
EMI0001.0007     
    zukommt.

         Beispiel:     100 Teile     Bz-1-Nitrobenzanthron    werden  in fein verteilter Form, zweckmässig als  Paste, mit 1000 Teilen technischer     Natrium-          bisulfitlösung    so lange am     Rückflusskühler     gekocht, bis alles oder fast alles umgesetzt ist.  Nach dem Verdünnen mit heissem Wasser    trennt man von     unangegriffenem    Ausgangs  material durch Filtrieren. Die Lösung wird  alsdann angesäuert, die schweflige Säure  durch kurzes Kochen vertrieben und das Re  aktionsprodukt durch Zugabe von Kochsalz  zur     Abscheidung    gebracht.  



  Der neue Körper stellt ein dunkelrotes  Pulver dar, welches sich in heissem Wasser  leicht mit roter Farbe auflöst. Die Lösungs  farbe in konzentrierter Schwefelsäure ist       bräunlichgelb    mit schwacher Fluoreszenz. Er  stellt an sich schon einen Farbstoff dar und  gibt zum Beispiel auf Wolle, Seide,     Azetat-          seide    leuchtend     brote    Färbungen. Daneben  kann der     ,neue    Stoff als. Ausgangsmaterial  für die Darstellung weiterer Farbstoffe die  nen.



  Process for the preparation of a new benzanthrone derivative. It has been found that a valuable derivative of benzanthrone is obtained if Bz-1-nitrobenzanthrone is treated with an alkali sulfite. The new compound is water-soluble and is a sulfonic acid of aminobenzanthrone, which probably has the formula:
EMI0001.0007
    comes to.

         Example: 100 parts of Bz-1-nitrobenzanthrone are finely divided, conveniently as a paste, boiled with 1000 parts of technical sodium bisulfite solution on the reflux condenser until everything or almost everything has been converted. After dilution with hot water, unaffected starting material is separated by filtration. The solution is then acidified, the sulphurous acid expelled by brief boiling and the reaction product is made to separate out by adding common salt.



  The new body is a dark red powder that dissolves easily with red color in hot water. The solution color in concentrated sulfuric acid is brownish-yellow with weak fluorescence. In itself it is a dye and gives bright, bread dyes on wool, silk and acetate silk, for example. In addition, the new substance can be used as a. Starting material for the preparation of other dyes.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen Benzanthronderivates, dadurch gekennzeich net, dass man Bz-1-Nitrobenzanthron mit einem Alkalisulfit behandelt. Die neue Ver bindung ist wasserlöslich und stellt eine Sul- fosäure des Aminobenzanthrons dar, welcher wahrscheinlich .die Formel: EMI0002.0004 zukommt. Der Körper stellt ein dunkelrotes Pulver dar, welches sich in heissem Wasser leicht mit roter Farbe auflöst. Die Lösungsfarbe in konzentrierter Schwefelsäure ist bräunlich gelb mit schwacher Fluoreszenz. PATENT CLAIM: Process for the preparation of a new benzanthrone derivative, characterized in that Bz-1-nitrobenzanthrone is treated with an alkali sulfite. The new compound is water-soluble and is a sulphonic acid of aminobenzanthrone, which probably has the formula: EMI0002.0004 comes to. The body is a dark red powder that easily dissolves in hot water with a red color. The solution color in concentrated sulfuric acid is brownish yellow with weak fluorescence. Er stellt an sich schon einen Farbstoff dar und gibt zum Beispiel auf 'olle, Seide, Azetatseide leu-h- tend rote Färbungen. Daneben kann der neue Stoff als Ausgangsmaterial für die Darstel lung weiterer Farbstoffe dienen. It is already a dye in itself and gives, for example, olle, silk, acetate silk, bright red dyes. In addition, the new substance can serve as a starting material for the representation of other dyes.
CH121569D 1925-06-27 1926-06-18 Process for the preparation of a new benzanthrone derivative. CH121569A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE121569X 1925-06-27

Publications (1)

Publication Number Publication Date
CH121569A true CH121569A (en) 1927-07-16

Family

ID=5656977

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121569D CH121569A (en) 1925-06-27 1926-06-18 Process for the preparation of a new benzanthrone derivative.

Country Status (1)

Country Link
CH (1) CH121569A (en)

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