CH240798A - Process for the preparation of a vat dye mixture. - Google Patents
Process for the preparation of a vat dye mixture.Info
- Publication number
- CH240798A CH240798A CH240798DA CH240798A CH 240798 A CH240798 A CH 240798A CH 240798D A CH240798D A CH 240798DA CH 240798 A CH240798 A CH 240798A
- Authority
- CH
- Switzerland
- Prior art keywords
- mixture
- dye mixture
- vat dye
- preparation
- vat
- 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)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Küpenfarbstoffgeinisclies. Es wurde gefunden, dass ein wertvolles Küpenfarbstoffgemisch hergestellt werden kann, wenn man ein Gemisch von die Reste
EMI0001.0003
abgebenden Verbindungen, das etwa 1/3 der in 4-Stellung chlorierten Komponente ent hält, mit einer den Rest
EMI0001.0007
abgebenden Verbindung kondensiert.
Das neue Farbstoffgemisch ist ein rosa rotes Pulver und färbt Baumwolle aus r < '>t- lichgelber Küpe in reinen Rosatönen von sehr guter Echtheit.
Ein bei dem vorliegenden Verfahren als Ausgangsstoff verwendbares Oxythionaph- thengemisch kann wie folgt erhalten werden: o-Nitrotoluol wird bei mässiger Tempe ratur in Gegenwart von Halogenüberträgern chloriert. Man erhält ein Gemisch, das rund <B>66%</B> 6-Chlor-2-nitro-l-methylbenzol lind rund 34 % 4-Chlor-2-nitro-l-methylbenzol aufweist.
Dieses Gemisch wird reduziert, das erhaltene Amingemisch wird diazotiert, mit Xantho- genaten umgesetzt und in üblicher Weise zum Gemisch der entsprechenden Oxythio- naphthene weiterverarbeitet (vergleiche auch Helv. Chim. Acta, Band 12, S. 931/2, 1929).
Das so erhaltene Oxythionaphthengemisch kann nun in an sich üblicher Weise in einem indifferenten Lösungsmittel mit einem Anil, zum Beispiel dem p-Dimethylaminoanil des 4 Mctliyl-6-cliloroxyl,liioiiaphthen s, kon @dQn- siert werden.
Ebenso ist es möglich, das Oxy- thionaphthengemisch in ein passendes Anil, zum Beispiel wieder in,das p-Dimüi;hylamino- anil, überzuführen und hierauf mit dem 4-Methyl-6-chloroxythionaphthen selbst zu kondensieren.
<I>Beispiel:</I> 19,85 g eines trockenen Gemisches von 6-Chlor-7-methyl-3-oxythionaphthen und 4- Chlor-7-methyl-3-oxythionaphthen, Idas etwa 1/? der in 4-Stellung chlorierten Komponente enthält, werden zusammen mit 33,05 g 4-Methyl-6-chlorthionaphthenchinon-p-dime- thylaminoanil in 500 cm' Chlorbenzol gelöst und 10 bis 14 Stunden bei 80-82 C gerührt.
Der in guter Ausbeute entstandene Farbstoff wird abfiltriert und mit Chlorbenzol nach gewaschen.
Process for the production of a vat dye mixture. It has been found that a valuable vat dye mix can be made by mixing the leftovers
EMI0001.0003
releasing compounds, which contains about 1/3 of the component chlorinated in the 4-position ent, with one the rest
EMI0001.0007
condensing compound emitting.
The new dye mixture is a pink-red powder and dyes cotton from a pale yellow vat in pure pink shades of very good fastness.
An oxythionaphthene mixture which can be used as starting material in the present process can be obtained as follows: o-Nitrotoluene is chlorinated at a moderate temperature in the presence of halogen carriers. A mixture is obtained which has around 66% 6-chloro-2-nitro-1-methylbenzene and around 34% 4-chloro-2-nitro-1-methylbenzene.
This mixture is reduced, the amine mixture obtained is diazotized, reacted with xanthogenates and further processed in the customary manner to form the mixture of the corresponding oxythiononaphthenes (see also Helv. Chim. Acta, Volume 12, pp. 931/2, 1929).
The oxythionaphthene mixture thus obtained can then be treated in an inert solvent with an anil, for example the p-dimethylaminoanil des 4-methyl-6-chloro-oxyl, liioiiaphthen s, in a manner customary per se.
It is also possible to convert the oxythionaphthene mixture into a suitable anil, for example again into the p-dimethylaminoanil, and then to condense with the 4-methyl-6-chloroxythionaphthen itself.
<I> Example: </I> 19.85 g of a dry mixture of 6-chloro-7-methyl-3-oxythionaphthen and 4-chloro-7-methyl-3-oxythionaphthen, Idas about 1 /? contains the component chlorinated in the 4-position, are dissolved together with 33.05 g of 4-methyl-6-chlorothionaphthenquinone-p-dimethylaminoanil in 500 cm 'of chlorobenzene and stirred at 80-82 ° C. for 10 to 14 hours.
The dyestuff formed in good yield is filtered off and washed with chlorobenzene.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH240798T | 1944-08-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH240798A true CH240798A (en) | 1946-01-31 |
Family
ID=4461967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH240798D CH240798A (en) | 1944-08-03 | 1943-10-28 | Process for the preparation of a vat dye mixture. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH240798A (en) |
-
1943
- 1943-10-28 CH CH240798D patent/CH240798A/en unknown
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