CH149413A - Process for the production of a nitrogen-containing condensation product. - Google Patents
Process for the production of a nitrogen-containing condensation product.Info
- Publication number
- CH149413A CH149413A CH149413DA CH149413A CH 149413 A CH149413 A CH 149413A CH 149413D A CH149413D A CH 149413DA CH 149413 A CH149413 A CH 149413A
- Authority
- CH
- Switzerland
- Prior art keywords
- nitrogen
- condensation product
- production
- containing condensation
- red
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines stickstoffhaltigen Kondensationsproduktes. Es wurde gefunden, dass man ein wert volles stickstoffhaltiges Kondensationspro dukt erhält, wenn man das aus dem durch Nitrieren von Pyrantbron in Nitrobenzol mit hochkonzentrierter Salpetersäure erhältlichen Nitropyranthron durch Reduktion entste hende 2lonoaminopyranthron mit Glyzerin in Gegenwart von sauren, wasserentziehenden Mitteln behandelt.
Gewünschtenfalls kann man zur Beschleunigung der Reaktion in Ge genwart von oxydierend wirkenden Mitteln, wie Nitrobenzol etc., arbeiten.
Das erhaltene Py ridinopyranthron löst sich in konzentrierter Schwefelsäure mit blauer Farbe, kristallisiert aus hochsiedenden organischen Lösungsmitteln in rotbraunen Nadeln, die oberhalb 300 C schmelzen, und liefert auf der pflanzlichen Faser aus violett roter Küpe sehr kräftige blaurote Färbungen von sehr guter Echtheit.
Beispiel: 42 Teile Monoaminopyranthron werden in 1000 Teilen konzentrierter Schwefelsäure un- ter Rühren gelöst. Nach Zugabe von 24 Tei len Nitrobenzol und 65 Teilen Glyzerin er wärmt man auf<B>110</B> bis 115 C und hält so lange bei dieser Temperatur, bis die Reak tion beendet ist, was man am Abfallen der während der Reaktion steigenden Innentem peratur leicht feststellen kann. Darauf arbei tet man in der üblichen Weise auf.
Das Reaktionsprodukt kann gegebenen falls über sein Oxoniumsalz oder Ammonium salz oder durch Behandeln mit Oxydations mitteln, zum Beispiel in Form seiner wässe rigen Paste mit Hypochlorit, gereinigt wer den.
Process for the production of a nitrogen-containing condensation product. It has been found that a valuable nitrogen-containing condensation product is obtained if the 2lonoaminopyranthrone produced by reduction of the nitropyranthrone obtained by nitrating pyrantbrone in nitrobenzene with highly concentrated nitric acid is treated with glycerol in the presence of acidic dehydrating agents.
If desired, one can work in the presence of oxidizing agents, such as nitrobenzene, etc., to accelerate the reaction.
The pyridinopyranthrone obtained dissolves in concentrated sulfuric acid with a blue color, crystallizes from high-boiling organic solvents in red-brown needles that melt above 300 ° C. and provides very strong blue-red colorations of very good fastness on the vegetable fiber from a violet-red vat.
Example: 42 parts of monoaminopyranthrone are dissolved in 1000 parts of concentrated sulfuric acid with stirring. After adding 24 parts of nitrobenzene and 65 parts of glycerine, it is warmed to 110 to 115 C and held at this temperature until the reaction has ended, which can be seen in the decrease in the increase during the reaction Can easily determine the internal temperature. You work on it in the usual way.
The reaction product can, if appropriate, via its oxonium salt or ammonium salt or by treatment with oxidizing agents, for example in the form of its aqueous paste with hypochlorite, purified.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE149413X | 1929-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH149413A true CH149413A (en) | 1931-09-15 |
Family
ID=5673324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH149413D CH149413A (en) | 1929-06-21 | 1930-06-20 | Process for the production of a nitrogen-containing condensation product. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH149413A (en) |
-
1930
- 1930-06-20 CH CH149413D patent/CH149413A/en unknown
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