CH191439A - Process for the preparation of a chromium-containing dye. - Google Patents
Process for the preparation of a chromium-containing dye.Info
- Publication number
- CH191439A CH191439A CH191439DA CH191439A CH 191439 A CH191439 A CH 191439A CH 191439D A CH191439D A CH 191439DA CH 191439 A CH191439 A CH 191439A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- chromium
- amino
- preparation
- water
- Prior art date
Links
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- Coloring (AREA)
Description
Verfahren zur Darstellung eines ehromhaltigen Farbstoffes. Gegenstand des vorliegenden, Patentes ist ein Verfahren zur Darstellung eines chrom- haltigen Farbstoffes, welches .dadurch ge kennzeichnet ist, dass man den Farbstoff, der erhältlich ist, wenn mau 4-Amino-1 .
8- naphthalsäureanhydrid mit Schwefelsäure monohydrat sulfiert und die so erhaltene Sulfosäure mit 2-Ogy-3-amino-5-sulfo-l- benzoesäure in Gegenwart von Wasser und Natriumbisulfit erhitzt, mit chromabgeben den Mitteln behandelt.
<I>Beispiel:</I> 50 Gewichsteile des Farbstoffes folgender Konstitution
EMI0001.0020
(der dadurch erhältlich ist, da.ss man 4-Amino- 1.8-naphthalsäureanliydrid mit Schwefel- säuremonohyd#rat sulfiert und die so erhal- tene Sulfosäure mit 2-Ogy-3-amino-5-sulfo- 1-benzoesäure in Gegenwart- von- Wasser und
Natriumbisulfit erhitzt) werden in 500 Ge- wichtsteilen Wasser bei schwach kongosaurer Reaktion suspendiert; dazu gibt man eine Lösung von Chromformiat (entsprechend 16 Cxewichtsteilen Chromoxyd) und hält einige Stunden im .Sieden. Nach und nach geht der Farbstoff unter Bildung seiner Chromver bindung in Lösung. Nach Beendigung der Reaktion wird der Farbstoff in üblicher Weise isoliert, abgesaugt und getrocknet. Er stellt ein in Wasser leicht lösliches, ,gelbes Pulver dar und ergibt z.
B. auf Wolle nach der für chromhaltige Farbstoffe üblichen Färbemethode grünstichig .gelbe, egale Fär bungen von guter Wasch-, Walk-, Schweiss-, Seewasser- und Lichtechtheit.
Process for the preparation of a dye containing Ehrom The subject of the present patent is a process for the preparation of a chromium-containing dye, which is characterized by the fact that the dye that is obtainable when 4-amino-1.
8-naphthalic anhydride sulfated with sulfuric acid monohydrate and the sulfonic acid thus obtained is heated with 2-Ogy-3-amino-5-sulfo-1-benzoic acid in the presence of water and sodium bisulfite, treated with chromium-releasing agents.
<I> Example: </I> 50 parts by weight of the dye of the following constitution
EMI0001.0020
(which can be obtained by sulfating 4-amino-1,8-naphthalic anhydride with sulfuric acid monohydrate and the sulfonic acid thus obtained with 2-Ogy-3-amino-5-sulfo-1-benzoic acid in the presence of- water and
Sodium bisulfite heated) are suspended in 500 parts by weight of water with a weak Congo acid reaction; a solution of chromium formate (corresponding to 16 parts by weight of chromium oxide) is added and it is boiled for a few hours. Gradually, the dye goes into solution to form its chromium compound. After the reaction has ended, the dye is isolated, filtered off with suction and dried in the usual way. It is an easily soluble in water, yellow powder and z.
B. on wool according to the dyeing method customary for chromium-containing dyes .gelbe, level dyeings of good washing, milled, perspiration, seawater and lightfastness.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE191439X | 1934-10-11 | ||
CH187695T | 1935-10-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH191439A true CH191439A (en) | 1937-06-15 |
Family
ID=25721568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH191439D CH191439A (en) | 1934-10-11 | 1935-10-08 | Process for the preparation of a chromium-containing dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH191439A (en) |
-
1935
- 1935-10-08 CH CH191439D patent/CH191439A/en unknown
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