CH216598A - Process for the production of a vat dye. - Google Patents
Process for the production of a vat dye.Info
- Publication number
- CH216598A CH216598A CH216598DA CH216598A CH 216598 A CH216598 A CH 216598A CH 216598D A CH216598D A CH 216598DA CH 216598 A CH216598 A CH 216598A
- Authority
- CH
- Switzerland
- Prior art keywords
- production
- brown
- dye
- parts
- 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
- C09B5/00—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
- C09B5/24—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings the heterocyclic rings being only condensed with an anthraquinone nucleus in 1-2 or 2-3 position
- C09B5/26—Carbazoles of the anthracene series
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfabren zur Herstellung eines Nüpenfarbstoffes. Es wurde gefunden, dass ein wertvoller Küpenfarbstoff hergesi llt werden kann, wenn man 2,7-Di-(1'-anthrachinonylamino-) xanthon mit kondensierenden Mitteln behan- delt. Der Farbstoff bildet ein braunes Pulver, das sich mit violetter Farbe in konzentrierter Schwefelsäure löst und Baumwolle aus brau ner Küpe in rotbraunen Tönen färbt.
Das, dem vorliegenden Verfahren als Aus gangsprodukt dienende 2,7-Di-(1'-anthrachi- nonylamino-)xanthon kann wie folgt herge stellt werden.: 3,5 Teile 2,7-Dibromxanthon (dargestellt nach Journal of the Chem. Soc., B.d. 43, Seite 193, durch 4stündiges Erhitzen von Xanthon mit der berechneten Menge Brom im Rohr auf<B>180')
</B> werden zusammen zeit 4,.9 Teilen 1-A minoanthraehinon, 3 Teilen wasserfreier Soda, 3 Teilen wasserfreiem Natriumaeetat und 0,5 Teilen Kupfarchlorür in 70 Teilen Nitrobenzol verteilt und 8 Stun den lang zum Sieden erhitzt.
Nach dem Er- kalten wird unter Absaugen filtriert, mit Ni- trobenzol, sowie Benzol und Alkohol ge- waschen, der Rückstand zur weiteren Reini gung mit verdünnter Salzsäure und hierauf mit Alkohol ausgekocht, abfiltriert, ge- waschen und getrocknet. Man erhält ein braunschwarzes, goldglänzendes, kristallines Pulver, das sich in konzentrierter Schwefel säure mit grüner Farbe löst.
Als kondensierende Mittel kommen insbe sondere diejenigen in Betracht, die zur Her stellung von Ringschlüssen, wie Carbazol- ringschlüssen, geeignet sind, wie Aluminium- chlorid, gegebenenfalls zusammen mit Alkali halogeniden, Benzylcyaniden, schwefliger Säure und Säurechloriden. Beispiel:
1 Teil des Umsetzungsproduktes aus 1 Mol 2,7-Dibromxanthon und 2 Mol 1-Amino- anthrachinon werden bei<B>150</B> in ein Gemisch von 12 Teilen wasserfmeiem Aluminium- ehlorid lind 3 Teilen trockenem Kochsalz ein- , Betraben und ;,@ Stunde bei dieser Tempera tur Berührt. Man trägt in his ein, filtriert und wäscht mit Wasser aus.
Der noch feuchte Rückstand wird in verdünnter Sehwe- felsäure verteilt und nach Zufügen von 0,3 Teilen Natriumnitrit 22 Stunden bei 0-5 gerührt. Man filtriert ab, wäscht gründlich aus und trocknet den gebildeten Farbstoff.
Procedure for the production of a nub dye. It has been found that a valuable vat dye can be produced if 2,7-di- (1'-anthraquinonylamino-) xanthone is treated with condensing agents. The dye forms a brown powder that dissolves in concentrated sulfuric acid with a violet color and dyes cotton from a brown vat in red-brown tones.
The 2,7-di- (1'-anthraquinoneylamino-) xanthone used as the starting product for the present process can be prepared as follows: 3.5 parts 2,7-dibromoxanthone (shown according to Journal of the Chem. Soc., Vol 43, page 193, by heating xanthone for 4 hours with the calculated amount of bromine in the tube to <B> 180 ')
</B> are distributed together time 4, .9 parts of 1-A minoanthraehinon, 3 parts of anhydrous soda, 3 parts of anhydrous sodium acetate and 0.5 part of copper chloride in 70 parts of nitrobenzene and heated to boiling for 8 hours.
After cooling, it is filtered with suction, washed with nitrobenzene as well as benzene and alcohol, the residue is boiled for further cleaning with dilute hydrochloric acid and then with alcohol, filtered off, washed and dried. A brown-black, shiny gold, crystalline powder is obtained which dissolves in concentrated sulfuric acid with a green color.
Particularly suitable condensing agents are those which are suitable for producing ring closures, such as carbazole ring closures, such as aluminum chloride, optionally together with alkali halides, benzyl cyanides, sulphurous acid and acid chlorides. Example:
1 part of the reaction product of 1 mole of 2,7-dibromoxanthone and 2 moles of 1-aminoanthraquinone are added at 150 to a mixture of 12 parts of anhydrous aluminum chloride and 3 parts of dry common salt, Betraben and ;, @ Hour at this temperature Touched. One enters in his, filtered and washed out with water.
The still moist residue is distributed in dilute sulfuric acid and, after adding 0.3 parts of sodium nitrite, stirred for 22 hours at 0-5. It is filtered off, washed thoroughly and the dye formed is dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH216598T | 1939-04-15 | ||
CH214180T | 1939-04-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH216598A true CH216598A (en) | 1941-08-31 |
Family
ID=25725563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH216598D CH216598A (en) | 1939-04-15 | 1939-04-15 | Process for the production of a vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH216598A (en) |
-
1939
- 1939-04-15 CH CH216598D patent/CH216598A/en unknown
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