CH152511A - Process for the preparation of a dye of the anthraquinone series. - Google Patents
Process for the preparation of a dye of the anthraquinone series.Info
- Publication number
- CH152511A CH152511A CH152511DA CH152511A CH 152511 A CH152511 A CH 152511A CH 152511D A CH152511D A CH 152511DA CH 152511 A CH152511 A CH 152511A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- blue
- acid
- preparation
- color
- Prior art date
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- Coloring (AREA)
Description
Verfahren zur Darstellung eines Farbstoffes der Anthrachinonreilie. Das vorliegende Verfahren betrifft die Darstellung eines grauen Farbstoffes der An- thrachinonreihe, darin bestehend, dass man ein Salz der 1-Amino-2,4-dibromantbrachinon-8- sulfosäure mit Dimethyl-p-phenylendiamin in Gegenwart von Kupferverbindungen und säurebindenden Mitteln kondensiert und die erhaltene Farbstoffbase so lange mit Sulfit behandelt,
bis das p-ständige Bromatom voll ständig durch eine Sulfogruppe ersetzt wird. <I>Beispiel:</I> 10 Teile 1-amino-2,4-dibromarithrachinon- 8-sulfosaures Kalium werden mit 100 Teilen Wasser, 2,5 Teilen wasserfreiem Natrium- carbonat, 1,5 Teil krist. Kupfersulfat und 10 Teilen Dimethyl-p-phenylendiamin in einer in differenten Atmosphäre so lange auf 60-70 C erhitzt, bis das Bromatom in 4-Stellung voll ständig durch den Dimethyl-p-Phenylendia- mirzrest ersetzt ist.
Die entstandene Farb- stoffsulfosäure wird durch Ansäuern gefällt und so lange mit Kaliumsulfit erhitzt, bis das Bromatom in 2 - Stellung durch eine Sulfo- gruppe vollständig ersetzt wird. Der entstan- dene Farbstoff wird durch Aussalzen ans der Lösung isoliert.
Er besitzt die Formel
EMI0001.0028
und stellt in trockenem Zustande ein schwar zes Pulver dar, welches in Wasser mit nein blauer, in konzentrierter Schwefelsäure mit trüb hellvioletter Farbe, welche auf Zusatz von Borsäure schmutzig blau wird, löslich ist. In kaltem Äthylalkohol ist er schwer mit blaugrüner Farbe löslich. Er färbt ungebeizte Wolle aus saurem Bade in trüb blauen Tönen an, welche durch Chromieren in ein bläu liches Grau übergehen.
Process for the preparation of a dye of the anthraquinone line. The present process relates to the preparation of a gray dye of the anthraquinone series, consisting in condensing a salt of 1-amino-2,4-dibromantbrachinone-8-sulfonic acid with dimethyl-p-phenylenediamine in the presence of copper compounds and acid-binding agents the dye base obtained is treated with sulfite for so long
until the p-bromine atom is completely replaced by a sulfo group. <I> Example: </I> 10 parts of 1-amino-2,4-dibromarithraquinone-8-sulfonic acid potassium are mixed with 100 parts of water, 2.5 parts of anhydrous sodium carbonate, 1.5 parts of crystalline. Copper sulfate and 10 parts of dimethyl-p-phenylenediamine are heated to 60-70 C in a different atmosphere until the bromine atom in the 4-position has been completely replaced by the dimethyl-p-phenylenediamine radical.
The resulting dye sulfonic acid is precipitated by acidification and heated with potassium sulfite until the bromine atom in position 2 is completely replaced by a sulfo group. The resulting dye is isolated from the solution by salting out.
He owns the formula
EMI0001.0028
and when dry it is a black powder which is soluble in water with no blue color, in concentrated sulfuric acid with a cloudy pale violet color, which turns dirty blue on the addition of boric acid. It is difficult to dissolve in cold ethyl alcohol with a blue-green color. He dyes unstained wool from an acid bath in cloudy blue tones, which turn into a bluish gray when chromed.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE152511X | 1929-10-04 | ||
CH149419T | 1930-09-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH152511A true CH152511A (en) | 1932-01-31 |
Family
ID=25715434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH152511D CH152511A (en) | 1929-10-04 | 1930-09-27 | Process for the preparation of a dye of the anthraquinone series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH152511A (en) |
-
1930
- 1930-09-27 CH CH152511D patent/CH152511A/en unknown
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