CH139703A - Process for the preparation of a nitrogenous vat dye. - Google Patents
Process for the preparation of a nitrogenous vat dye.Info
- Publication number
- CH139703A CH139703A CH139703DA CH139703A CH 139703 A CH139703 A CH 139703A CH 139703D A CH139703D A CH 139703DA CH 139703 A CH139703 A CH 139703A
- Authority
- CH
- Switzerland
- Prior art keywords
- works
- preparation
- nitrogenous
- acid
- dibenzanthrone
- Prior art date
Links
Landscapes
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines stickstoffhaltigen Itüpenfarbstoffes. Im Hauptpatent ist ein Verfahren zur Darstellung eines stickstoffhaltigen Küpen- farbstoffes beschrieben,
bei dem man 1 Mol. des durch Behandlung von Pyranthron mit Halogen in Chlorsulfonsäure erhältlichen Te- trahalogenpyranthrons mit 3 Mol. des durch Nitrieren von Dibenzanthron mit 'Salpeter säure in Nitrobenzol und Reduktion der entstandenen Nitroverbindung erhältlichen Aminodibenzanthrons und 1 Mod. 1-Amino- anthraebinon umsetzt.
Es wurde nun befunden, ,dass man einen neuen Küpenfarbstoff erhält, wenn man 1 Mol. Tetrahalogeninsodibenzanthron, er hältlich durch Halogenieren von Isadibenz- anthron in Chlorsulfonsäure, mit 2 Mol. Aminodibenzanthron,
erhältlich durch Reduk tion .des durch Nitrieren von Dibenzanthron in Nitrobenzol erhältlichen Nitrodibenzan- throns, und, 2 Mol. 1-Amino-anthrachinon um setzt. Die Kondensation führt man zweck mässig in hochsiedenden Verdünnungsmitt@_ln Lind unter Zusatz von säurebindenden Mit teln, wie Natrium.acetat, aus.
Vielfach ist es von Vorteil, Katalysatoren, beispielsweise Kupferverbindungen, zuzusetzen.
Der neue Farbstoff .löst sich in konzen trierter ;Schwefelsäure mit violetter Farbe Lind gibt mit alkalischer Hydrosulfitlösung eine blaue Küpenlösung, aus der die pflanz liche Faser in blaugrauen, hervorragend ech ten Tönen gefärbt wird. <I>Beispiel:</I> Eine Suspension von 7;
8 Teilen Tetra bromisodibenzanthron (dargestellt durch Bro- mieren von Isodbenzanthron in Chlorsulfon- säure), 10 Teilen Natriumacetat, 2 Teilen Kupferoxyd, 9,4 Teilen Aminodibenzanthron, 4,6 Teilen 1-Aminoanthraehinon in. 250 Tei len Nitrobenzol wird unter Rühren so lange gekocht, bis das Reaktionsprodukt praktisch bromfrei ist.
Dann arbeitet man in der üb- liGhen Weise .auf.
Process for the preparation of a nitrogen-containing itupe dye. The main patent describes a process for the preparation of a nitrogen-containing vat dye,
in which 1 mol. of the tetrahalogenopyranthrone obtainable by treating pyranthrone with halogen in chlorosulfonic acid with 3 mol. of the aminodibenzanthrone and 1 mod. 1-aminoanthraebinone obtainable by nitrating dibenzanthrone with nitric acid in nitrobenzene and reducing the nitro compound formed implements.
It has now been found that a new vat dye is obtained if 1 mol. Of tetrahalogeninsodibenzanthrone, obtainable by halogenating isadibenzanthrone in chlorosulfonic acid, with 2 mol. Of aminodibenzanthrone,
obtainable by reduction of the nitrodibenzanthrone obtainable by nitrating dibenzanthrone in nitrobenzene, and converts 2 mol of 1-amino-anthraquinone. The condensation is expediently carried out in high-boiling diluents and with the addition of acid-binding agents, such as sodium acetate.
It is often of advantage to add catalysts, for example copper compounds.
The new dye dissolves in concentrated sulfuric acid with a violet color and an alkaline hydrosulphite solution gives a blue vat solution from which the vegetable fibers are dyed in blue-gray, exceptionally real shades. <I> Example: </I> A suspension of 7;
8 parts of tetra-bromoisodibenzanthrone (prepared by brominating isodbenzanthrone in chlorosulfonic acid), 10 parts of sodium acetate, 2 parts of copper oxide, 9.4 parts of aminodibenzanthrone, 4.6 parts of 1-aminoanthraehinone in 250 parts of nitrobenzene are stirred for so long cooked until the reaction product is practically bromine-free.
Then you work up in the usual way.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE139703X | 1927-10-18 | ||
CH138317T | 1928-10-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH139703A true CH139703A (en) | 1930-04-30 |
Family
ID=25713154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH139703D CH139703A (en) | 1927-10-18 | 1928-10-01 | Process for the preparation of a nitrogenous vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH139703A (en) |
-
1928
- 1928-10-01 CH CH139703D patent/CH139703A/en unknown
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