CH173980A - Process for the preparation of a dye of the anthracene series. - Google Patents
Process for the preparation of a dye of the anthracene series.Info
- Publication number
- CH173980A CH173980A CH173980DA CH173980A CH 173980 A CH173980 A CH 173980A CH 173980D A CH173980D A CH 173980DA CH 173980 A CH173980 A CH 173980A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- anthracene series
- water
- orange
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Farbstoffes der Anthracenreihe. Gegenstand vorliegenden Patentes ist ein Verfahren zur Darstellung eines Farbstoffes der Anthracenreihe, welches dadurch gekenn zeichnet ist, dass man den 2-Amino-3-methoxy- anthrahydrochinon-9. t0-dischwefelsäureester in alkalischem Medium mit Bleisuperogyd oxydiert.
<I>Beispiel:</I> Eine Lösung von 45,8 Gewichtsteilen des Natriuaisalzes des 2-Amino-3-methoxy- 'anthi-ahydrochinon-9.10-dischwefelsäureesters und 140 Gewichtsteilen Natronlauge (320B6) in 500 Gewichtsteilen Wasser, werden mit 250 Gewichtsteilen einer Pb02-Paste (49 %) versetzt und 2 Stunden bei 80-85 0 gerührt. Nun wird abgesaugt und aus dem rotorange gefärbten Filtrat durch Aussalzen oder durch Eindampfen zur Trockne eine orangerote Substanz erhalten.
Durch Umlösen aus Was ser und Aussalzen erhält man als Endpro dukt des Verfahrens den neuen Farbstoff als schöne, orange gefärbte Nadeln, die sich mit goldgelber Farbe und schwacher Fluoreszenz in Wasser lösen. Beim Ansäuern der Lösung mit Mineralsäure schlägt die Farbe über <I>Grün</I> nach Blau um, und bald scheidet sich eine blauviolette Verbindung ab, die sich in Wasser unter Zusatz von Soda mit blau stichig-roter Farbe löst. Durch die Einwir kung saurer Oxydationsmittel, z. B. Natrium nitrit und Salzsäure oder durch Behandeln der Reaktionsprodukte mit verdünnter Mine ralsäure bei Anwesenheit oxydierend wirken der Salze wie z. B.
Kupfersulfat wird sowohl aus der gelben, als auch aus der blauvioletten Verbindung ein grünblauer güpenfarbstoff erhalten.. der wohl 3.3'-Dimethoxy-N-dihydro- 1.2.2'.1'-anthrachinonazin darstellt.
Process for the preparation of a dye of the anthracene series. The subject of the present patent is a process for the preparation of a dye of the anthracene series, which is characterized in that the 2-amino-3-methoxy-anthrahydroquinone-9. t0-disulfuric acid ester oxidized in an alkaline medium with lead superogyd
<I> Example: </I> A solution of 45.8 parts by weight of the sodium salt of the 2-amino-3-methoxy- 'anthi-ahydroquinone-9.10-disulfuric acid ester and 140 parts by weight of sodium hydroxide solution (320B6) in 500 parts by weight of water are mixed with 250 Parts by weight of a Pb02 paste (49%) were added and the mixture was stirred at 80-85 ° for 2 hours. It is then filtered off with suction and an orange-red substance is obtained from the red-orange colored filtrate by salting out or by evaporation to dryness.
By dissolving from water and salting out the end product of the process, the new dye is obtained as beautiful, orange-colored needles that dissolve in water with a golden yellow color and weak fluorescence. When the solution is acidified with mineral acid, the color changes from <I> green </I> to blue, and soon a blue-violet compound is deposited, which dissolves in water with the addition of soda with a blue-tinged red color. By the action of acidic oxidizing agents such. B. sodium nitrite and hydrochloric acid or by treating the reaction products with dilute mine ralsäure in the presence of an oxidizing effect of the salts such. B.
Copper sulphate is obtained from the yellow as well as from the blue-violet compound a green-blue color pigment .. which is probably 3.3'-dimethoxy-N-dihydro-1.2.2'.1'-anthraquinone azine.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE173980X | 1932-03-26 | ||
CH170092T | 1933-03-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH173980A true CH173980A (en) | 1934-12-15 |
Family
ID=25718866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH173980D CH173980A (en) | 1932-03-26 | 1933-03-21 | Process for the preparation of a dye of the anthracene series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH173980A (en) |
-
1933
- 1933-03-21 CH CH173980D patent/CH173980A/en unknown
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