AT29054B - Process for the preparation of a green vat dye. - Google Patents

Process for the preparation of a green vat dye.

Info

Publication number
AT29054B
AT29054B AT29054DA AT29054B AT 29054 B AT29054 B AT 29054B AT 29054D A AT29054D A AT 29054DA AT 29054 B AT29054 B AT 29054B
Authority
AT
Austria
Prior art keywords
preparation
vat dye
green
green vat
dye
Prior art date
Application number
Other languages
German (de)
Original Assignee
Farbenfab Vorm Bayer F & Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE1905178129D external-priority patent/DE178129C/de
Application filed by Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Application granted granted Critical
Publication of AT29054B publication Critical patent/AT29054B/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

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  Verfahren zur Darstellung eines grünen Küpenfarbstoffes. 
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   Das so erhaltene Produkt stellt ein grünschwarzes Pulver dar, welches in organischen Lösungsmitteln sehr schwer löslich ist. Die Lösung in konzentrierter Schwefelsäure ist gelb, beim   Eingiessen   in Wasser scheiden sich grüne Flocken ab. In rauchender Schwefelsäure von 400/0 löst sich das Produkt mit brauner Farbe. 



   In der Küpe färbt das Produkt ungebeizte Baumwolle in schönen blaugrünen Nuancen von hervorragender Echtheit. 



   Beispiel 2. 



   20 kg des oben erwähnten   Nitrokärpers   werden mit 200 kg Phonylhydrazin vorsichtig zum Kochen erhitzt. Die Masse färbt sich grün und bald scheidet sich der Farbstoff in feinen grünen Kristallen ab, welche nach dem Erkalten und Verdünnen der Schmelze mit Alkohol abfiltriert und mit Alkohol gewaschen werden. 



   Statt der in den obigen Beispielen benutzten Reduktionsmittel können auch andere angewendet werden, wie z. B.   Zinnchlorür   in saurer oder alkalischer Lösung usw. Man kann auch die Reduktion des Nitrokörpers mit der Herstellung der   Küpe   in einer Operation vereinigen.



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  Process for the preparation of a green vat dye.
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   The product thus obtained is a greenish-black powder which is very sparingly soluble in organic solvents. The solution in concentrated sulfuric acid is yellow; green flakes separate when poured into water. In fuming sulfuric acid of 400/0 the product dissolves with a brown color.



   In the vat, the product dyes unstained cotton in beautiful blue-green shades of excellent fastness.



   Example 2.



   20 kg of the above-mentioned nitro body are carefully heated to the boil with 200 kg of phonylhydrazine. The mass turns green and soon the dye separates out in fine green crystals, which after cooling and diluting the melt with alcohol are filtered off and washed with alcohol.



   Instead of the reducing agents used in the above examples, others can also be used, such as. B. Tin chloride in acidic or alkaline solution, etc. One can also combine the reduction of the nitro body with the manufacture of the vat in one operation.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung eines grünen Küpenfarbstoffes, darin bestehend, dass man auf don durch Behandlung von (x-ss-Dianthrachinonimid mit Nitrierungsmitteln erhältlichen Nitrokörper Reduktionsmittel einwirken lässt. PATENT CLAIM: Process for the preparation of a green vat dye, consisting in that nitro body reducing agents obtainable by treatment of (x-ss-dianthraquinonimide with nitrating agents) are allowed to act on don.
AT29054D 1905-09-01 1906-10-13 Process for the preparation of a green vat dye. AT29054B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1905178129D DE178129C (en) 1905-09-01 1905-09-01

Publications (1)

Publication Number Publication Date
AT29054B true AT29054B (en) 1907-07-10

Family

ID=5704724

Family Applications (1)

Application Number Title Priority Date Filing Date
AT29054D AT29054B (en) 1905-09-01 1906-10-13 Process for the preparation of a green vat dye.

Country Status (1)

Country Link
AT (1) AT29054B (en)

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