CH106443A - Process for the production of a new indigoid dye. - Google Patents
Process for the production of a new indigoid dye.Info
- Publication number
- CH106443A CH106443A CH106443DA CH106443A CH 106443 A CH106443 A CH 106443A CH 106443D A CH106443D A CH 106443DA CH 106443 A CH106443 A CH 106443A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- production
- indigoid dye
- parts
- green
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B7/00—Indigoid dyes
- C09B7/10—Bis-thionapthene indigos
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines indigoiden Farbstoffes. Es wurde gefunden, da.ss man einen indi- goiden Farbstoff erhält, wenn man das 2,3- T'hion,aphthisatin, in welchem das a-Keton- sauerstoffatom durch ein abspaltba.res Radi kal, wie zum Beispiel Halogen oder eine Anilgruppe, ersetzt ist, mit 2,
3-Naphththio- indoxyl kondensiert und das so erhaltene Produkt monobromiert. Der Farbstoff stellt ein grünblaues Pulver dar, das sich in Mono hydrat mit grüner Farbe löst. Mit Hydrosul- fit und Natronlauge bildet es eine orange Küpe und färbt daraus Baiunwolle in echten Farbtönen, die blauer und reiner sind als die mittelst des unbromierten Farbstoffes her stellbaren.
Beispiel: 5000 Teile Sprit, 332 Teile 2-(d'-Dime- thyla.mialo)-a.nil des 2,3 - Thionaphthisatins und 200 Teile 2,3-Naphththioindoxyl werden kurze Zeit am Rückflusskühler gekocht. Der gebildete Farbstoff wird hierauf filtriert und geltrocknet.
In eine Lösung von 176 Teilen Brom in 8000 Teilen Nitrobenzol werden 396 Teile des so erhaltenen Farbstoffes eingetragen. Nach mehrstündiger Einwirkung bei gPwöhn- licher Temperatur wird unter Rühren lana- saan auf eine Ölbadtemperatur von 125 er wärmt und so lange bei 125 bis <B>135'</B> gehal ten, bis das Brom verschwunden ist. Nach dem Erkalten wird filtriert, mit Alkohol ge waschen und der in guter Ausbeute erhaltene Farbstoff getrocknet.
Process for the production of an indigoid dye. It has been found that an indigoid dye is obtained if the 2,3-thione, aphthisatin, in which the a-ketone oxygen atom is removed by a radical, such as halogen or a Anil group, is replaced with 2,
3-naphththioindoxyl condensed and the product thus obtained monobrominated. The dye is a green-blue powder that dissolves in monohydrate with a green color. With hydrosulfite and caustic soda, it forms an orange vat and dyes cotton wool in real shades that are bluer and purer than those that can be produced by means of the unbrominated dye.
Example: 5000 parts of fuel, 332 parts of 2- (d'-Dimethyla.mialo) -a.nil des 2,3-thionaphthisatin and 200 parts of 2,3-naphthioindoxyl are boiled for a short time on the reflux condenser. The dye formed is then filtered and gel-dried.
396 parts of the dye thus obtained are introduced into a solution of 176 parts of bromine in 8000 parts of nitrobenzene. After several hours of exposure at normal temperature, the lanasaan is heated to an oil bath temperature of 125 while stirring and held at 125 to 135 'until the bromine has disappeared. After cooling, it is filtered, washed with alcohol and the dye obtained in good yield is dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH100705T | 1922-11-18 | ||
CH106443T | 1923-07-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH106443A true CH106443A (en) | 1924-09-01 |
Family
ID=25705858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH106443D CH106443A (en) | 1922-11-18 | 1923-07-18 | Process for the production of a new indigoid dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH106443A (en) |
-
1923
- 1923-07-18 CH CH106443D patent/CH106443A/en unknown
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