CH200287A - Process for the preparation of an acidic dye. - Google Patents
Process for the preparation of an acidic dye.Info
- Publication number
- CH200287A CH200287A CH200287DA CH200287A CH 200287 A CH200287 A CH 200287A CH 200287D A CH200287D A CH 200287DA CH 200287 A CH200287 A CH 200287A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- weight
- parts
- acidic dye
- dye
- Prior art date
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- Coloring (AREA)
Description
Verfahren zur Herstellung eines sauren Farbstoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines sauren Farbstoffes. Das Verfahren ist dadurch ge kennzeichnet, dass man 4-Benzoylamiro-1.2- diaminoanthrachinon mit "Isatin kondensiert und das erhaltene Produkt sulfoniert. Der neue Farbstoff stellt ein dunkles, mit brauner Farbe lösliches Pulver dar.
<I>Beispiel:</I> 36 Gewichtsteile 4-Benzoylamino-1.2- diaminoanthrachinon, <B>15</B> Gewichtsteile Isatin, 500 Gewichtsteile Eisessig und 50 Gewichts teile Wasser werden 18 Stunden unter Rühren und Rückfluss gekocht, der gebildete Chin- ogalinfarbstoff der Konstitution
EMI0001.0014
durch Eintragen in Wasser gefällt, abgesaugt, ausgewaschen und getrocknet. Er löst sich in konzentrierter Schwefelsäure grün, während sich die Ausgangsstoffe rot lösen.
Die Kon densation kann auch in einem andern Lö- sungamittel, wie kochendem Trichlorbenzol, vorgenommen werden.
40 Gewichtsteile des so erhaltenen Kon densationsproduktes wurden in 90 Gewichts teilen monohydratischer Schwefelsäure gelöst, 20 Gewichtsteile Borsäure, 270 Gewichtsteile 65 o/oigen Oleums zugegeben und auf<B>100'</B> erwärmt, bis Löslichkeit in Alkali erzielt ist. Man gibt auf Eis, filtriert ab, löst in Alkali, filtriert und fällt das Filtrat mit Salzsäure und Kochsalz. Der so erhaltene Farbstoff wird abgesaugt, mit Kochsalzlösung gewa schen und getrocknet.
Der so erhaltene Farbstoff färbt Wolle aus saurem Bad in tiefen Bordotönen an, die eine hervorragende Lichtechtheit zeigen.
Process for the preparation of an acidic dye. The present patent relates to a process for the preparation of an acidic dye. The process is characterized in that 4-benzoylamiro-1,2-diaminoanthraquinone is condensed with isatin and the product obtained is sulfonated. The new dye is a dark powder which is soluble in brown color.
<I> Example: </I> 36 parts by weight of 4-benzoylamino-1,2-diaminoanthraquinone, <B> 15 </B> parts by weight of isatin, 500 parts by weight of glacial acetic acid and 50 parts by weight of water are boiled for 18 hours with stirring and reflux, the chin - ogaline pigment of the constitution
EMI0001.0014
precipitated by immersion in water, suctioned off, washed out and dried. It dissolves green in concentrated sulfuric acid, while the starting materials dissolve red.
The condensation can also be carried out in another solvent, such as boiling trichlorobenzene.
40 parts by weight of the condensation product thus obtained were dissolved in 90 parts by weight of monohydric sulfuric acid, 20 parts by weight of boric acid and 270 parts by weight of 65% oleum were added and the mixture was heated to 100% until solubility in alkali was achieved. It is poured onto ice, filtered off, dissolved in alkali, filtered and the filtrate is precipitated with hydrochloric acid and common salt. The dye obtained in this way is filtered off with suction, washed with saline solution and dried.
The dye obtained in this way dyes wool from an acid bath in deep Bordeaux tones, which show excellent lightfastness.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200287X | 1936-05-12 | ||
CH198717T | 1937-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH200287A true CH200287A (en) | 1938-09-30 |
Family
ID=25723172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH200287D CH200287A (en) | 1936-05-12 | 1937-04-30 | Process for the preparation of an acidic dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH200287A (en) |
-
1937
- 1937-04-30 CH CH200287D patent/CH200287A/en unknown
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