CH154057A - Process for the preparation of a dye. - Google Patents
Process for the preparation of a dye.Info
- Publication number
- CH154057A CH154057A CH154057DA CH154057A CH 154057 A CH154057 A CH 154057A CH 154057D A CH154057D A CH 154057DA CH 154057 A CH154057 A CH 154057A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- brominating agent
- process according
- bromine
- Prior art date
Links
Landscapes
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Paper (AREA)
Description
Verfahren zur Darstellung eines Farbstoffes. Gegenstand dieses Zusatzpatentes ist ein Verfahren zur Darstellung eines Farbstoffes, welches dadurch gekennzeichnet ist, dass man eine Verbindung der folgenden Formel:
EMI0001.0001
in Gegenwart eines Lösungsmittels mit einem bromfierenden Mittel behandelt.
<I>. Beispiel:</I> 60 gr des aus 9 . 5-Di-(N-Methylcarba- zolyl-3'-amino)-3. 6-dichlor-1 . 4-benzochinon erhaltenen Kondensationsproduktes werden in eine Mischung von 900 gr Schwefelsäure mit 32 gr Brom eingetragen, 5 Stunden ge rührt und auf Eis gegeben. Durch Absaugen erhält man einen Farbstoff, der etwa vier Bromatome enthält und als fein verteilte,. intensiv blau färbendes Pigment wichtig ist für die Papier-, Tapeten- und Lackindustrie.
Process for the preparation of a dye. The subject of this additional patent is a process for the preparation of a dye, which is characterized in that a compound of the following formula is used:
EMI0001.0001
treated with a brominating agent in the presence of a solvent.
<I>. Example: </I> 60 gr of from 9. 5-di- (N-methylcarbazolyl-3'-amino) -3. 6-dichloro-1. 4-benzoquinone obtained condensation product are introduced into a mixture of 900 grams of sulfuric acid with 32 grams of bromine, stirred for 5 hours and poured onto ice. A dye is obtained by suction, which contains about four bromine atoms and is finely divided. intensive blue coloring pigment is important for the paper, wallpaper and paint industry.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE154057X | 1929-10-19 | ||
CH151336T | 1930-10-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH154057A true CH154057A (en) | 1932-04-15 |
Family
ID=25715814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH154057D CH154057A (en) | 1929-10-19 | 1930-10-18 | Process for the preparation of a dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH154057A (en) |
-
1930
- 1930-10-18 CH CH154057D patent/CH154057A/en unknown
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