DE481450C - Process for the preparation of nitrogenous cow dyes - Google Patents
Process for the preparation of nitrogenous cow dyesInfo
- Publication number
- DE481450C DE481450C DEI32626D DEI0032626D DE481450C DE 481450 C DE481450 C DE 481450C DE I32626 D DEI32626 D DE I32626D DE I0032626 D DEI0032626 D DE I0032626D DE 481450 C DE481450 C DE 481450C
- Authority
- DE
- Germany
- Prior art keywords
- preparation
- nitrogenous
- dyes
- cow
- blue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
- C09B3/22—Dibenzanthrones; Isodibenzanthrones
- C09B3/30—Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung von stickstoffhaltigen Küpenfarbstoffen Es wurde gefunden, daß man neue, wertvolle, stickstoffhaltige Küpenfarbstoffe erhält, wenn man Nitrodibenzanthrone, deren Derivate oder Homologe, wie sie beispielsweise nach den Verfahren der Patente 185 222 oder q.o2 641 erhalten werden, mit schwach alkalischen Mitteln, z. B. mit Alkali- oder Erdalkalisalzen schwacher Säuren, wie Natriumacetat, Kaliumacetat, Kaliumformiat, Pottasche usw., gegebenenfalls in Anwesenheit von Lösungs- oder Verdünnungsmitteln und Katalysatoren, z. B. Kupferverbindungen, behandelt. Die in ausgezeichneter Ausbeute erhaltenen Farbstoffe färben die pflanzliche Faser aus meist blauer, alkalischer Hydrosulfitküpe in kräftigen, blaugrauen, sehr echten Tönen. Sie lösen sich in konzentrierter Schwefelsäure mit roter Farbe und können aus hochsiedenden Lösungsmitteln in Form dunkelvioletter Nadeln erhalten werden. Beispiel 5o Teile Nitrodibenzanthron (dargestellt"nach Patent 402 6q:1) werden in q.oo Teilen Nitrobenzol mit q.o Teilen Kaliumacetat und 3 Teilen Kupferoxyd so lange unter Rühren gekocht, bis die Farbstoffbildung beendet ist, was man darän erkennt, daß eine Probe des Reaktionsprodukts sich in konzentrierter Schwefelsäure mit roter Farbe löst. Nach dem Erkalten wird abgesaugt, der Rückstand mit verdünnter Mineralsäure und Wasser ausgewaschen und getrocknet. Man kann die Aufarbeitung des Reaktionsgemisches auch in -der Weise vornehmen, daß man die heiße Reaktionsflüssigkeit mit Nitrobenzol verdünnt und von etwa vorhandenen Verunreinigungen heiß absaugt, worauf der Farbstoff sich aus der Lösung beim Erkalten in reiner Form abscheidet. Er ist ein dunkelblaues Pulver, kristallisiert aus Nitrobenzol in dunkelvioletten Nadeln, löst sich in konzentrierter Schwefelsäure mit roter Farbe und liefert auf Baumwolle aus blauer Küpe hervorragend chlorechte, kräftige blaugraue Töne.Process for the preparation of nitrogenous vat dyes It has been found that new, valuable, nitrogen-containing vat dyes are obtained, if one uses nitrodibenzanthrones, their derivatives or homologues, such as, for example obtained by the method of patents 185 222 or q.o2 641, with weak alkaline agents, e.g. B. with alkali or alkaline earth salts of weak acids, such as Sodium acetate, potassium acetate, potassium formate, potash, etc., if necessary in the presence of solvents or diluents and catalysts, e.g. B. copper compounds, treated. The dyes obtained in excellent yield color the vegetable Fiber from mostly blue, alkaline hydrosulfite vat in strong, blue-gray, very real tones. They dissolve in concentrated sulfuric acid with red color and can be obtained from high-boiling solvents in the form of dark purple needles will. Example 5o parts of nitrodibenzanthrone (shown "according to patent 402 6q: 1) are in q.oo parts of nitrobenzene with q.o parts of potassium acetate and 3 parts of copper oxide Cooked with stirring until the dye has finished forming, which is what you get recognizes that a sample of the reaction product is in concentrated sulfuric acid with red paint dissolves. After cooling, it is suctioned off, the residue with dilute Mineral acid and water washed out and dried. One can work up the Make the reaction mixture in the manner that the hot reaction liquid diluted with nitrobenzene and siphoned off any impurities while hot, whereupon the dye separates out of the solution in pure form when it cools. It is a dark blue powder, crystallized from nitrobenzene in dark purple Needles, dissolves in concentrated sulfuric acid with red color and delivers on Cotton from a blue vat has excellent chlorine-fast, strong blue-gray tones.
Ersetzt man das Kaliumacetat durch andere schwach alkalisch reagierende Salze, z. B. Pottasche, Natriumacetat oder Kaliumformiat, so erhält man Farbstoffe von ähnlichen Eigenschaften.If the potassium acetate is replaced by other weakly alkaline reactants Salts, e.g. B. potash, sodium acetate or potassium formate, dyes are obtained of similar properties.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI32626D DE481450C (en) | 1927-11-08 | 1927-11-08 | Process for the preparation of nitrogenous cow dyes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI32626D DE481450C (en) | 1927-11-08 | 1927-11-08 | Process for the preparation of nitrogenous cow dyes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE481450C true DE481450C (en) | 1929-08-23 |
Family
ID=7188190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEI32626D Expired DE481450C (en) | 1927-11-08 | 1927-11-08 | Process for the preparation of nitrogenous cow dyes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE481450C (en) |
-
1927
- 1927-11-08 DE DEI32626D patent/DE481450C/en not_active Expired
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