CH132223A - Process for the preparation of a dinitroarylaminodiarylamine. - Google Patents
Process for the preparation of a dinitroarylaminodiarylamine.Info
- Publication number
- CH132223A CH132223A CH132223DA CH132223A CH 132223 A CH132223 A CH 132223A CH 132223D A CH132223D A CH 132223DA CH 132223 A CH132223 A CH 132223A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- dinitroarylaminodiarylamine
- binding agent
- preparation
- brown
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Dinitroarylaminodiarylamins. Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Darstellung eines Di- nitroarylaminodiarylamins folgender Konsti tution
EMI0001.0005
welches dadurch gekennzeichnet ist, dass man 4-aminodiphenylamin-2'-methoxy-2-sulfosaures Natron mit 1-Chlor-2 . 6-dinitrobenzol-4-sulfo- methylanilid in wässeriger Lösung in Gegen wart eines säurebindenden Mittels bei einer Temperatur, die zwischen 30 bis 100 C liegt, kondensiert.
<I>Beispiel:</I> 316 Gewichtsteile 4-aminodiphenylamin- 2'-methoxy-2-sulfosaures Natron und 246,5 Gewichtsteile 1-Chlor- 2 . 6 - dinitrobenzol - 4 - sulfomethylanilid werden in Wasser unter Zusatz von überschüssigem Natriumacetat 2-3 Stunden auf 80 bis 90 erwärmt. Das nach dem Erkalten abgesaugte Reaktions produkt kann aus Wasser umkristallisiert werden und stellt ein braunes Pulver dar, welches Wolle in schönem, braunem, wasch echtem Farbton anfärbt.
Das Verfahren kann auch in der Weise durchgeführt werden, dass man das Natrium acetat durch andere säurebindende Mittel er setzt, z. B. durch Kreide.
Im letzteren Falle vollzieht sich die Auf- ärbeitung nach erfolgter Kondensation derart, dass man das Reaktionsgemisch sodaalkalisch stellt, von abgeschiedener Kreide abfiltriert und den Farbstoff aus der Lauge in bekann ter Weise durch Aussalzen isoliert. Oder aber man stellt das Reaktionsgemisch nach beendeter Kondensation schwach salzsauer, saugt den abgeschiedenen Farbstoff ab, wäscht mit Wasser neutral und kristallisiert aus Wasser unter Zusatz äquivalenter Mengen Soda um.
Process for the preparation of a dinitroarylaminodiarylamine. The present invention relates to a process for the preparation of a di-nitroarylaminodiarylamine of the following constitution
EMI0001.0005
which is characterized in that 4-aminodiphenylamine-2'-methoxy-2-sulfonic acid sodium with 1-chloro-2. 6-dinitrobenzene-4-sulfomethylanilide is condensed in aqueous solution in the presence of an acid-binding agent at a temperature between 30 and 100 ° C.
<I> Example: </I> 316 parts by weight of 4-aminodiphenylamine-2'-methoxy-2-sulfonic acid soda and 246.5 parts by weight of 1-chloro-2. 6 - dinitrobenzene - 4 - sulfomethylanilide are heated to 80 to 90 for 2-3 hours in water with the addition of excess sodium acetate. The reaction product sucked off after cooling down can be recrystallized from water and is a brown powder which stains wool in a beautiful, brown, real wash color.
The process can also be carried out in such a way that the sodium acetate is replaced by other acid-binding agents, e.g. B. by chalk.
In the latter case, after the condensation has taken place, the work-up takes place in such a way that the reaction mixture is made alkaline with soda, the chalk that has separated out is filtered off and the dye is isolated from the lye in a known manner by salting out. Or the reaction mixture is made weakly acidic with hydrochloric acid after the condensation has ended, the deposited dye is filtered off with suction, washed neutral with water and recrystallized from water with the addition of equivalent amounts of soda.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE132223X | 1926-10-18 | ||
CH129885T | 1927-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH132223A true CH132223A (en) | 1929-03-31 |
Family
ID=25711330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH132223D CH132223A (en) | 1926-10-18 | 1927-10-17 | Process for the preparation of a dinitroarylaminodiarylamine. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH132223A (en) |
-
1927
- 1927-10-17 CH CH132223D patent/CH132223A/en unknown
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