CH128993A - Process for the production of a new condensation product of the benzanthrone series. - Google Patents

Process for the production of a new condensation product of the benzanthrone series.

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Publication number
CH128993A
CH128993A CH128993DA CH128993A CH 128993 A CH128993 A CH 128993A CH 128993D A CH128993D A CH 128993DA CH 128993 A CH128993 A CH 128993A
Authority
CH
Switzerland
Prior art keywords
benzanthrone
new
production
condensation product
new condensation
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 CH128993A publication Critical patent/CH128993A/en

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Description

  

  Verfahren zur Herstellung     eines    neuen     Kondensationsproduktes     der     Benzanthronreihe.       Es wurde gefunden, dass man zu neuen       Kondensationsprodukten    der     Benzanthronreihe     gelangt, wenn man     Benzanthrone    mit aro  matischen     Oxyverbindungen    oder deren     Sub-          stitutionsprodukten    in Gegenwart von     Ätz-          alkalien    auf höhere Temperatur erhitzt.

   Um       Farbstoffbildung    möglichst auszuschliessen,  wird der Zusatz von     Ätzalkali    zweckmässig  so bemessen, dass die zur     Phenolatbildung     erforderliche Menge nicht wesentlich über  sehritten wird.  



  Vorliegendes Patent bezieht sieh auf ein  Verfahren zur Herstellung eines neuen Kon  densationsproduktes, das dadurch gekenn  zeichnet ist, dass man     Benzanthron    mit       P-Naphtol    in Gegenwart von     Ätzalkalien    auf  höhere Temperaturen erhitzt.  



  Die neue Verbindung wird durch Um  kristallisieren aus Nitrobenzol in Form glän  zender Blättchen erhalten, die sich in Schwefel  säure mit roter Farbe ohne Fluoreszenz lösen.  Die Verbindung färbt sich bei 260  rot und  schmilzt über 300 , sie löst sich in alkoholi-    scher Lauge mit roter Farbe. Der neue  Körper soll als Zwischenprodukt zur Her  stellung von Farbstoffen Verwendung finden.  <I>Beispiel:</I>  In eine auf 140  erhitzte Schmelze von  20 kg     ss-Naphtol    und 7,8 kg     Ätzkali    werden  20 kg     Benzanthron    eingetragen. Man erhitzt  hierauf auf 200  und rührt mehrere Stunden  bei dieser Temperatur. Die heisse Schmelze  wird dann in Wasser gegossen und das ab  geschiedene Reaktionsprodukt abgesaugt.

   Die  neue Verbindung kann durch Auskochen mit  Eisessig von unverändertem     Benzanthron    be  freit werden.



  Process for the production of a new condensation product of the benzanthrone series. It has been found that new condensation products of the benzanthrone series are obtained if benzanthrones with aromatic oxy compounds or their substitution products are heated to a higher temperature in the presence of caustic alkalis.

   In order to rule out dye formation as far as possible, the addition of caustic alkali is expediently measured in such a way that the amount required for phenolate formation is not significantly exceeded.



  The present patent relates to a process for the production of a new condensation product which is characterized in that benzanthrone is heated to higher temperatures with P-naphtol in the presence of caustic alkalis.



  The new compound is obtained by recrystallizing from nitrobenzene in the form of shiny platelets that dissolve in sulfuric acid with a red color without fluorescence. The compound turns red at 260 and melts above 300, it dissolves in alcoholic lye with a red color. The new body should be used as an intermediate product for the manufacture of dyes. <I> Example: </I> 20 kg of benzanthrone are added to a melt heated to 140 of 20 kg of ss-naphtol and 7.8 kg of caustic potash. The mixture is then heated to 200 and stirred for several hours at this temperature. The hot melt is then poured into water and the separated reaction product is filtered off with suction.

   The new compound can be freed from unchanged benzanthrone by boiling it with glacial acetic acid.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Kondensationsproduktes der Benzanthronreihe, dadurch gekennzeichnet, dass man Benzan- thron mit fl-Naphtol in Gegenwart von Ätz- alkalien auf höhere Temperatur erhitzt. Die neue Verbindung wird durch 'Um- kristallisieren aus Nitrobenzol in Form glän zender Blättchen erhalten, die sich in Schwefel säure mit roter Farbe ohne Fluoreszenz lösen. Die Verbindung färbt sich bei 260 rot und schmilzt über 300 , sie löst sich in alkoholi scher Lauge mit roter Farbe. PATENT CLAIM: Process for the production of a new condensation product of the benzanthrone series, characterized in that benzanthrone is heated to a higher temperature with fl-naphtol in the presence of caustic alkalis. The new compound is obtained by recrystallization from nitrobenzene in the form of shiny flakes which dissolve in sulfuric acid with a red color without fluorescence. The compound turns red at 260 and melts above 300, it dissolves in alcoholic liquor with a red color. Der neue Körper soll als Zwischenprodukt zur Her stellung von Farbstoffen Verwendung finden. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man den Zusatz von Ätzalkali so bemisst, dass die zur Phenolat- bildung erforderliche Menge nicht wesentlich überscbritten wird. The new body should be used as an intermediate product for the manufacture of dyes. SUBSTANTIAL CLAIM: Method according to patent claim, characterized in that the addition of caustic alkali is measured in such a way that the amount required for phenolate formation is not significantly exceeded.
CH128993D 1926-09-04 1927-08-23 Process for the production of a new condensation product of the benzanthrone series. CH128993A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE128993X 1926-09-04

Publications (1)

Publication Number Publication Date
CH128993A true CH128993A (en) 1928-11-16

Family

ID=5662834

Family Applications (1)

Application Number Title Priority Date Filing Date
CH128993D CH128993A (en) 1926-09-04 1927-08-23 Process for the production of a new condensation product of the benzanthrone series.

Country Status (1)

Country Link
CH (1) CH128993A (en)

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