CH150307A - Process for the preparation of a chromium-containing dye. - Google Patents
Process for the preparation of a chromium-containing dye.Info
- Publication number
- CH150307A CH150307A CH150307DA CH150307A CH 150307 A CH150307 A CH 150307A CH 150307D A CH150307D A CH 150307DA CH 150307 A CH150307 A CH 150307A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- dye
- preparation
- containing dye
- acid
- Prior art date
Links
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Description
Verfahren zur Darstellung eines chromhaltigen Farbstoffes. Es wurde gefunden, dass mau einen wert vollen chromhaltigen Farbstoff erhält, wenn man den aus diazotierter p-Aminosulfosali- cylsäure und Resorcin erhältlichen Azofarb- stoff mit Verbindungen des dreiwertigen Chroms behandelt.
Diese Behandlung kann beispielsweise durch Erhitzen auf dem Was serbad oder durch Kochen unter Rückfluss- kühlung mit Lösungen von Chromiformiat, -acetat oder -fluorid etc. durchgeführt wer den. Die erhaltene Chromverbihdung des Farbstoffes gibt besonders auf Leder schöne, volle, gleichmässige Braunfärbungen, die sehr gut lichtecht sind.
<I>Beispiel:</I> 35 Gewichtsteile des Azofarbstoffes aus diazotierter p - Aminosulfo:salicylsäure (OH : COOH : NHZ : S03H = 1 : 2 : 4 : 6) und Resorcin werden mit 500 Teilen Wasser und etwa 43 Teilen einer zirka 24% CrA enthaltenden Chromoxydhydratpaste und 20 Teilen 85%iger Ameisensäure zirka 1 bis 2 Stunden lang bei 80-100 C erhitzt;
da nach isoliert man den Farbstoff durch Ein dampfen der Lösung oder durch Aussalzen. Man erhält ein bräunliches Pulver, das sich in konzentrierter Schwefelsäure mit oranger Farbe löst und auf Leder ein :gleichmässiges, besonders volles, schönes, sehr lichtechtes Braun liefert.
Process for the preparation of a chromium-containing dye. It has been found that a valuable chromium-containing dye is obtained if the azo dye obtainable from diazotized p-aminosulfosalicylic acid and resorcinol is treated with compounds of trivalent chromium.
This treatment can be carried out, for example, by heating on the water bath or by refluxing with solutions of chromiformate, acetate or fluoride etc. The chromium compound obtained in the dye gives beautiful, full, even brown colorations, particularly on leather, which are very lightfast.
<I> Example: </I> 35 parts by weight of the azo dye from diazotized p-aminosulfo: salicylic acid (OH: COOH: NHZ: S03H = 1: 2: 4: 6) and resorcinol are mixed with 500 parts of water and about 43 parts of an approx Chromium oxide hydrate paste containing 24% CrA and 20 parts of 85% formic acid heated at 80-100 C for about 1 to 2 hours;
because after you isolate the dye by evaporating the solution or by salting out. A brownish powder is obtained which dissolves in concentrated sulfuric acid with an orange color and gives a uniform, particularly full, beautiful, very lightfast brown on leather.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE150307X | 1929-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH150307A true CH150307A (en) | 1931-10-31 |
Family
ID=5673830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH150307D CH150307A (en) | 1929-11-18 | 1930-10-14 | Process for the preparation of a chromium-containing dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH150307A (en) |
-
1930
- 1930-10-14 CH CH150307D patent/CH150307A/en unknown
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