CH120713A - Process for the preparation of 6,6'-diaminoisodibenzanthrone. - Google Patents
Process for the preparation of 6,6'-diaminoisodibenzanthrone.Info
- Publication number
- CH120713A CH120713A CH120713DA CH120713A CH 120713 A CH120713 A CH 120713A CH 120713D A CH120713D A CH 120713DA CH 120713 A CH120713 A CH 120713A
- Authority
- CH
- Switzerland
- Prior art keywords
- bzl
- preparation
- blue
- sulfuric acid
- diaminoisodibenzanthrone
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung von 6,6'-Diaminoisodibenzanthron. Gegenstand dieses Zusatzpatentes ist ein Verfahren zur Darstellung von 6.6'-Di- aminoisodibenzanthron. Das Verfahren besteht darin, dass man 6.6'-Diamino-Bzl, Bzl'-benzanthronylsulfid folgender Formel:
EMI0001.0006
mit alkalischen Kondensationsmitteln, insbe sondere alkoholischem Alkali behandelt.
<I>Beispiel</I> In eine auf 185 bis 140 erwärmte Schmelze von 100 Gewichtsteilen Ätzkali und 80 Gewichtsteilen Äthylalkohol werden 20 Gewichtsteile 6.6'-Diamino-Bzl, Bzl'- benzanthronylsulfid (dargestellt durch Ein wirkung von Natriumpolysulfid auf 6-Nitro- Bzl-brombenzanthron bei Temperaturen von 180 bis<B>1510)</B> eingerührt. Das Gemisch wird etwa 1 Stunde bei<B>135</B> bis 140 gehalten, mit Wasser aufgenommen und solange Luft eingeleitet, bis kein Farbstoff in Form der Leukoverbindung mehr vorhanden ist.
Durch Absaugen und Waschen mit Wasser erhält .man den Farbstoff. Er stellt ein blauviolet tes Pulver dar, das sich in konzentrierter ,Schwefelsäure mit grüner Farbe löst und aus blauer Hydrosulfitküpe Baumwolle viol- lettblau färbt. Der Farbstoff kann durch Fraktionieren aus Schwefelsäure in bekaDn- ter Weise gereinigt werden.
An Stelle von Äthylalkohol kann man auch andere Alkohole, an Stelle vor- Kali hydrat andere Ätzalkalien verwenden.
Process for the preparation of 6,6'-diaminoisodibenzanthrone. The subject of this additional patent is a process for the preparation of 6,6'-di-aminoisodibenzanthrone. The procedure consists in that you can 6.6'-diamino-Bzl, Bzl'-benzanthronyl sulfide of the following formula:
EMI0001.0006
treated with alkaline condensation agents, in particular special alcoholic alkali.
<I> Example </I> In a melt heated to 185 to 140 parts by weight of caustic potash and 80 parts by weight of ethyl alcohol, 20 parts by weight of 6.6'-diamino-Bzl, Bzl'-benzanthronyl sulfide (represented by the action of sodium polysulfide on 6-nitro- Bzl-brombenzanthron stirred in at temperatures from 180 to <B> 1510) </B>. The mixture is kept at 135 to 140 for about 1 hour, taken up with water and air passed in until there is no longer any dye in the form of the leuco compound.
The dye is obtained by suctioning off and washing with water. It is a blue-violet powder that dissolves in concentrated sulfuric acid with a green color and turns cotton into violet-blue from a blue hydrosulfite vat. The dye can be purified in a known manner by fractionating it from sulfuric acid.
Instead of ethyl alcohol, other alcohols can also be used, and other caustic alkalis can be used instead of potassium hydrate.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE120713X | 1924-10-20 | ||
CH119233T | 1927-12-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH120713A true CH120713A (en) | 1927-06-16 |
Family
ID=25709238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH120713D CH120713A (en) | 1924-10-20 | 1925-10-19 | Process for the preparation of 6,6'-diaminoisodibenzanthrone. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH120713A (en) |
-
1925
- 1925-10-19 CH CH120713D patent/CH120713A/en unknown
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