CH148691A - Process for the preparation of a vat dye. - Google Patents
Process for the preparation of a vat dye.Info
- Publication number
- CH148691A CH148691A CH148691DA CH148691A CH 148691 A CH148691 A CH 148691A CH 148691D A CH148691D A CH 148691DA CH 148691 A CH148691 A CH 148691A
- Authority
- CH
- Switzerland
- Prior art keywords
- red
- preparation
- dye
- vat
- vat dye
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Küpenfarbstoffes. Gegenstand dieses Patentes ist ein Ver fahren zur Darstellung eines Küpenfarb- Stoffes, welches dadurch gekennzeichnet ist, dass man Naphtoylen-benzimidazol-peri-di- ca.rbonsäureanhydrid mit 4-Chlor-1 .2-di- aminobenzol kondensiert.
<I>Beispiel:</I> 3,4 Gewichtsteile Naphtoylen-benzimid- a.zol-peri.-diearbonsäureanhydrid werden in einer Mischung aus 20 Gewichtsteilen Nitro benzol und der gleichen Menge Eisessig zum gelinden Sieden erhitzt, und darauf wird eine Eisessiglösung von 1,5 Gewichtsteilen 4- Chlor-1 .2-diaminobenzol zugegeben. Nach kurzer Zeit beginnt sich das Kondensations produkt als roter kristalliner Niederschlag abzuscheiden.
Durch Absaugen, Auswaschen mit Eisessig, Ethylalkohol und Wasser wird der Farbstoff gewonnen. Er stellt nach dem Trocknen ein rotes, feinkristallines Pulver dar, löst sich in konzentrierter Schwefelsäure mit gelbroter Farbe und liefert, eine oliv grüne Küpe, aus der Baumwolle in roten Tönen von guten Echtheitseigenschaften an gefärbt wird.
Process for the preparation of a vat dye. The subject of this patent is a process for the preparation of a vat color substance, which is characterized in that naphthoylene-benzimidazole-peri-di-approximatelyrboxylic acid anhydride is condensed with 4-chloro-1,2-di-aminobenzene.
<I> Example: </I> 3.4 parts by weight of naphthoylene-benzimide-a.zol-peri.-diearboxylic acid anhydride are heated to a gentle boil in a mixture of 20 parts by weight of nitrobenzene and the same amount of glacial acetic acid, and a glacial acetic acid solution of 1.5 parts by weight of 4-chloro-1,2-diaminobenzene were added. After a short time, the condensation product begins to separate out as a red crystalline precipitate.
The dye is obtained by suctioning off, washing out with glacial acetic acid, ethyl alcohol and water. After drying it is a red, finely crystalline powder, dissolves in concentrated sulfuric acid with a yellow-red color and provides an olive-green vat from which cotton is dyed in red shades with good fastness properties.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE148691X | 1928-06-18 | ||
CH143998T | 1929-06-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH148691A true CH148691A (en) | 1931-07-31 |
Family
ID=25714400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH148691D CH148691A (en) | 1928-06-18 | 1929-06-05 | Process for the preparation of a vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH148691A (en) |
-
1929
- 1929-06-05 CH CH148691D patent/CH148691A/en unknown
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