CH130609A - 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.Info
- Publication number
- CH130609A CH130609A CH130609DA CH130609A CH 130609 A CH130609 A CH 130609A CH 130609D A CH130609D A CH 130609DA CH 130609 A CH130609 A CH 130609A
- Authority
- CH
- Switzerland
- Prior art keywords
- benzanthrone
- new
- condensation product
- production
- new condensation
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfuhren zur Herstellung eines neuen Kondensationsproduktes der Benzanthronreihe. Es wurde gefunden, dass man zu neuen Kondensationsprodukten der Benzanthron- reihe gelangt, wenn man Benzanthrone mit aromatischen Oxyverbindungen oder deren Substitutionsprodukten in Gegenwart von Atzalkalien auf höherer Temperatur erhitzt.
Um Farbstoffbildung möglichst auszu schliessen, wird der Zusatz von Ätzalkali zweckmässig so bemessen, dass die zur Phe- nolatbildung erforderliche Menge nicht we sentlich iibprsehritten wird.
Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung eines neuen Kon densationsprodukte:, das dadurch gekenn zeichnet ist. dass man Benzauthron mit a-Naphtol in Gegenwart von Ätzalkalien auf höhere Temperaturen erhitzt.
Die neue Verbindung bildet, aus Nitro- benzol umkristallisiert, kleine gelbe Prismen, die über 300 schmelzen, sie löst sich in Schwefelsäure mit roter Farbe. Der neue Körper soll als Zwischenprodukt zur Her stellung von Farbstoffen dienen.
<I>Beispiel:</I> 200 kg a-Naphthol und 8<B>1</B>0 kg Ätzkali werden auf 200' erhitzt und hierauf in die Schmelze unter Rühren 20 kg Benzanthron eingetragen. Man hält die Schmelze sechs Stunden bei dieser Temperatur, giesst sie dann in Wasser und saugt das abgeschiedene Reaktionsprodukt ab. Die neue Verbindung kann durch Auskochen mit Eisessig von un verändertem Benzanthron befreit 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 by it. that Benzauthron is heated to higher temperatures with a-naphtol in the presence of caustic alkalis.
Recrystallized from nitrobenzene, the new compound forms small yellow prisms that melt over 300 and dissolve in sulfuric acid with a red color. The new body should serve as an intermediate product for the manufacture of dyes.
<I> Example: </I> 200 kg of a-naphthol and 8 <B> 1 </B> 0 kg of caustic potash are heated to 200 'and then 20 kg of benzanthrone are added to the melt with stirring. The melt is kept at this temperature for six hours, 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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE130609X | 1926-09-04 | ||
CH128993T | 1927-08-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH130609A true CH130609A (en) | 1928-12-15 |
Family
ID=25711185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH130609D CH130609A (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) | CH130609A (en) |
-
1927
- 1927-08-23 CH CH130609D patent/CH130609A/en unknown
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