CH190906A - Process for the preparation of a leather dye. - Google Patents
Process for the preparation of a leather dye.Info
- Publication number
- CH190906A CH190906A CH190906DA CH190906A CH 190906 A CH190906 A CH 190906A CH 190906D A CH190906D A CH 190906DA CH 190906 A CH190906 A CH 190906A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- dye
- leather
- leather dye
- nitro
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Lederfarbstoffes. Gegenstand des vorliegenden Zusatzpa tentes ist ein Verfahren.zur Darstellung eines Lederfarbstoffes, welches dadurch gekenn zeichnet ist, dass man 2 Mol 4-Nitro-3'- aminodipherrylamin-2,4'-disulfosäure mit 11M1 Chloranil kondensiert.
<I>Beispiel:</I> Zu einer wässrigen Lösung des Natrium salzes der 4-Nitro-3'-amirrodipherryl-2,4'-disul- fosäure, erhalten durch Kondensation von 19 Gewichtsteilen 1,3-Diaminoberrzol-4-sulfo- säure mit 26 Gewichtsteilen 4-Nitro-l-chlor- benzol=2-sulfonsaurem Natrium, werden unter Rühren 12 Gewichtsteile Chloranil und 6 Ge wichtsteile Soda gegeben. Die Masse wird 20 Stunden lang im Sieden erhalten. Die so entstandene tiefbraune Lösung wird zur Trockne eingedampft, wobei 55-60 Gewichts teile eines Produktes entstehen, das zum Färben von Leder in braunen Tönen geeignet ist.
Der Farbstoff hat folgende Zusammen setzung:
EMI0001.0014
Der so erhaltene Farbstoff hat die wert volle Eigenschaft, Leder bis tief in den Kern hinein zu färben.
Process for the preparation of a leather dye. The subject of the present additional patent is a method for the preparation of a leather dye, which is characterized in that 2 mol of 4-nitro-3'-aminodipherrylamine-2,4'-disulfonic acid are condensed with 11M1 chloranil.
<I> Example: </I> To an aqueous solution of the sodium salt of 4-nitro-3'-amirrodipherryl-2,4'-disulfonic acid, obtained by condensation of 19 parts by weight of 1,3-diaminoberrzene-4-sulfo - Acid with 26 parts by weight of 4-nitro-1-chlorobenzene = 2-sulfonic acid sodium, 12 parts by weight of chloranil and 6 parts by weight of soda are added with stirring. The mass is kept boiling for 20 hours. The resulting deep brown solution is evaporated to dryness, 55-60 parts by weight of a product that is suitable for dyeing leather in brown tones.
The dye has the following composition:
EMI0001.0014
The dye obtained in this way has the valuable property of dyeing leather deep into the core.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE190906X | 1934-11-30 | ||
CH188323T | 1935-11-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH190906A true CH190906A (en) | 1937-05-15 |
Family
ID=25721633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH190906D CH190906A (en) | 1934-11-30 | 1935-11-27 | Process for the preparation of a leather dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH190906A (en) |
-
1935
- 1935-11-27 CH CH190906D patent/CH190906A/en unknown
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