CH173978A - 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
- CH173978A CH173978A CH173978DA CH173978A CH 173978 A CH173978 A CH 173978A CH 173978D A CH173978D A CH 173978DA CH 173978 A CH173978 A CH 173978A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- anthracene series
- anthracene
- series
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zier Darstellung eines Farbstoffes der Anthracenreihe. Gegenstand vorliegenden Patentes ist ein Verfahren zur Darstellung eines Farbstoffes der Anthracenreihe, welches dadurch gekenn zeichnet ist, dass man 2-Chlor-2-aniinoleuko- anthrachinon-9.10-dischwefelsäureester in al- lialischeni Aledium mitBleisuperoxyd oxydiert.
<I>Beispiel:</I> 100 Gewichtsteile Dikaliumsalz des 3 Chloi--2-aininoleukoanthrachinon-9.10-dischwe- felsäureesters werden in etwa 1000 Gewichts teilen Wasser gelöst und 25 Gewichtsteile Soda zugefügt. Bei<B>700</B> setzt man 150 Ge wichtsteile einer wässerigen Bleisuperoxyd- paste (48"/o) zu und rührt bei der angege benen Temperatur 2 bis 3 Stunden.
Nach dem Erkalten wird filtriert und aus der fluoreszierenden tief gelbgefärbten Lösung durch Zugeben von Kaliumehlorid das be- reits bekannte Endprodukt des Verfahrens, ein orangeroter kristallinischer Niederschlag abgeschieden. Dieser löst sich in Wasser mit intensiv gelber Farbe. Versetzt man diese Lösung mit verdünnter Salzsäure, dann bildet sich ein blaugefärbter Niederschlag, der auf Zusatz eines Oxydationsmittels, zum Beispiel Natriumnitrit, in ein unlösliches , leuchtendes Blau (Dichlorindanthren) über geht.
Process decorative representation 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 2-chloro-2-aniinoleuko-anthraquinone-9.10-disulfuric acid ester is oxidized with lead superoxide in allyalic aluminum.
<I> Example: </I> 100 parts by weight of the dipotassium salt of 3 chloi - 2-aininoleukoanthraquinone-9.10-disulfuric acid ester are dissolved in about 1000 parts by weight of water and 25 parts by weight of soda are added. At <B> 700 </B>, 150 parts by weight of an aqueous lead peroxide paste (48 "/ o) are added and the mixture is stirred at the specified temperature for 2 to 3 hours.
After cooling, it is filtered and the already known end product of the process, an orange-red crystalline precipitate, is deposited from the fluorescent deep yellow solution by adding potassium chloride. This dissolves in water with an intense yellow color. If this solution is mixed with dilute hydrochloric acid, a blue-colored precipitate is formed which, when an oxidizing agent, for example sodium nitrite, is added, turns into an insoluble, bright blue (dichloroindanthrene).
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE173978X | 1932-03-26 | ||
| CH170092T | 1933-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH173978A true CH173978A (en) | 1934-12-15 |
Family
ID=25718864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH173978D CH173978A (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) | CH173978A (en) |
-
1933
- 1933-03-21 CH CH173978D patent/CH173978A/en unknown
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