CH127449A - Process for the preparation of an indigoid dye. - Google Patents
Process for the preparation of an indigoid dye.Info
- Publication number
- CH127449A CH127449A CH127449DA CH127449A CH 127449 A CH127449 A CH 127449A CH 127449D A CH127449D A CH 127449DA CH 127449 A CH127449 A CH 127449A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- dye
- indigoid dye
- indigoid
- diketodihydro
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines indigoiden Farbstoffes. Gegenstand dieses Zusatzpatentes ist ein Verfahren zur Darstellung eines indigoiden Farbstoffes durch Kondensation des 4.5.6.7- Tetrachlor-3-oxy-l-thionaphtens .der Formel:
EMI0001.0008
mit 2'-[p-Dimethylamino]-anil des 4-Brom- naphtalin-3. 2- (2'. 3'-Diketodihydro-1'-thio- naphtens). Beispiel: 26 Gewichtsteile 4. 5. 6. 7-Tetrachlor-3- Oxy-l-thionaphten werden in 25 Gewichts teilen Eisessig mit 35 Gewichtsteilen des 2' [p-Dimethylamino]-anils des 4-Bromnaphta- lin-3. 2- (2'. 3'-Diketodihydro-1'-thionaphtens) von der Formel:
EMI0001.0021
unter Rückiluss so lange gekocht, bis keine weitere Farbstoffbildung mehr eintritt. Man kühlt ab und trennt den Farbstoff vom Eis essig.
Der Farbstoff bildet ein. violettes Pulver, das sich in heisser konzentrierter Schwefel säure mit grüner Farbe löst. Er färbt auf Baumwolle aus der güpe ein Violett.
Process for the preparation of an indigoid dye. The subject of this additional patent is a process for the preparation of an indigoid dye by condensation of 4.5.6.7-tetrachloro-3-oxy-l-thionaphthene of the formula:
EMI0001.0008
with 2 '- [p-dimethylamino] -anil des 4-bromonaphthalene-3. 2- (2 ', 3'-diketodihydro-1'-thio-naphthene). Example: 26 parts by weight of 4/5/6 7-tetrachloro-3-oxy-1-thionaphthene are mixed in 25 parts by weight of glacial acetic acid with 35 parts by weight of the 2 '[p-dimethylamino] anil of 4-bromonaphthalene-3. 2- (2 '. 3'-Diketodihydro-1'-thionaphtens) of the formula:
EMI0001.0021
Cooked under reflux until no more dye formation occurs. It is cooled and the color is separated from the glacial vinegar.
The dye forms a. purple powder that dissolves in hot concentrated sulfuric acid with a green color. It dyes a purple on cotton from the güpe.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE127449X | 1925-12-04 | ||
CH123739T | 1926-11-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH127449A true CH127449A (en) | 1928-09-01 |
Family
ID=25710148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH127449D CH127449A (en) | 1925-12-04 | 1926-11-29 | Process for the preparation of an indigoid dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH127449A (en) |
-
1926
- 1926-11-29 CH CH127449D patent/CH127449A/en unknown
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