CH139676A - Process for the preparation of a nitrogenous vat dye. - Google Patents
Process for the preparation of a nitrogenous vat dye.Info
- Publication number
- CH139676A CH139676A CH139676DA CH139676A CH 139676 A CH139676 A CH 139676A CH 139676D A CH139676D A CH 139676DA CH 139676 A CH139676 A CH 139676A
- Authority
- CH
- Switzerland
- Prior art keywords
- mol
- preparation
- nitrogenous
- acid
- obtainable
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
Verfahren zur Darstellung eines stickstoffhaltigen Küpenfarbstoffes: 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 Chloxrsulfonsäure erhältlichen Tetrahalogenpyranthrons mit ä Mol. des durch Nitrieren von Diben.zauthron mit Sal petersäure in Nitrobenzol,
und Reduktion der entstandenen Nitroverbindung erhältlichen Amiuodibenzanthro@ns und 1 Mol. 1-Amino- a,nthraohinon umsetzt.
Es wurde nun gefunden, dass man einen neuen Küpenfarbstoff' erhält, wenn man 1 Mal. Dihalogeniso,dibenzanthron, erhält lieh durch Halo@genieren von lsodibenzan- thron in Chlorsulfonsäure, mit 1 Mol.. 1- Axninoanthra,ehino@n und 1 Mol. Aminodi- benzauthron,
erhältlich durch Reduktion des durch Nitrieren von Dibenzanthron erhäf- li.chen Nitraclibenzanthrons, umsetzt. Die Kondensation führt man zweckmässig in hochsiedenden Verdünnungsmitteln und un- ter Zusatz von säurebindenden Mitteln, wie Natriumacetat, aus.
Vielfach isst es von Vor teil, Katalysatoren, beispielsweise Kupferver- hindungen, zuzusetzen.
Der neue Farbistoff löst sich in konzen- trierter Schwefelsäure mit violetter Farbe und gibt mit alkalischer Hydlrosulfitlösung eine grünblaue Küpenlösung, aus der die pflanzliche Fasier in dunkelblauen, hervor ragend .echten Tönen gefärbt wird.
Beispiel: 62 Teile Dibromisodibenzanthron (dar gestellt durch Bromieren von Iso.dibenzan- thron in Chlorsulfons.äure) werden in 200 Teilen Nitrotoluol:
mit<B>2,3</B> Teilen 1-Amino- anthraehinon, 4,7 Teilen Aminodibenzan- thro,n, 5 Teilen Natriumacetat und 1 Teil Kupferoxyd so lange unter Rühren gekocht, bis das Reaktionsprodukt praktisch bromfrei ist. Dann wird in der üblichen Weise auf gearbeitet.
Process for the preparation of a nitrogen-containing vat 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 chloro-sulfonic acid with a mol. of that obtained by nitrating Diben.zauthron with nitric acid in nitrobenzene,
and reduction of the resulting nitro compound available Amiuodibenzanthro @ ns and 1 mol. 1-Amino- a, nthraohinon converts.
It has now been found that a new vat dye is obtained if one. Dihalogeniso, dibenzanthron, obtained by halo @ genes of isodibenzanthrone in chlorosulfonic acid, with 1 mol .. 1- Axninoanthra, ehino @ n and 1 mol. Aminodibenzauthron,
obtainable by reducing the nitraclibenzanthrone obtainable by nitrating dibenzanthrone. 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 advantageous to add catalysts, for example copper inhibitors.
The new dye dissolves in concentrated sulfuric acid with a violet color and, with an alkaline hydrosulphite solution, gives a green-blue vat solution from which the vegetable fiber is colored in dark blue, outstandingly true shades.
Example: 62 parts of dibromoisodibenzanthrone (produced by bromination of isodibenzanthrone in chlorosulfonic acid) in 200 parts of nitrotoluene:
with <B> 2.3 </B> parts of 1-amino anthraehinone, 4.7 parts of aminodibenzanthro, 1.5 parts of sodium acetate and 1 part of copper oxide are boiled with stirring until the reaction product is practically bromine-free. Then work on in the usual way.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE139676X | 1927-10-18 | ||
CH138317T | 1928-10-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH139676A true CH139676A (en) | 1930-04-30 |
Family
ID=25713128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH139676D CH139676A (en) | 1927-10-18 | 1928-10-01 | Process for the preparation of a nitrogenous vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH139676A (en) |
-
1928
- 1928-10-01 CH CH139676D patent/CH139676A/en unknown
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