CH120720A - Process for the preparation of isodibenzanthrone. - Google Patents
Process for the preparation of isodibenzanthrone.Info
- Publication number
- CH120720A CH120720A CH120720DA CH120720A CH 120720 A CH120720 A CH 120720A CH 120720D A CH120720D A CH 120720DA CH 120720 A CH120720 A CH 120720A
- Authority
- CH
- Switzerland
- Prior art keywords
- isodibenzanthrone
- preparation
- violet
- bzl
- sulfide
- Prior art date
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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
- C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
- C07C45/72—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 119233. Verfahren zur Darstellung von Isodibenzanthron. Gegenstand dieses Zusatzpatentes ist ein Verfahren zur Darstellung von Isodibenz- anthron.
Das Verfahren besteht darin, dass man Bzl-Äthylbenzanthronylsulfid der Formel:
EMI0001.0006
mit einem alkalischen Kondensationsmittel, insbesondere alkoholischem Alkali, behandelt. <I>Beispiel:</I> In eine aus 150 Gewichtsteilen Kali hydrat und 150 Gewichtsteilen Äthylalkohol dargestellte Schmelze trägt man bei etwa 140 30 Gewichtsteile Bzl-Äthylbenzanthro- nylsulfid ein und rührt etwa eine Stunde bei der gleichen Temperatur. Die Schmelze wird mit Wasser verdünnt und durch die erhal tene Suspension so lange Luft geleitet, bis kein Farbstoff mehr in Form der Leukover- bindung vorhanden ist. Man filtriert und wäscht mit Wasser gut aus.
Der so erhaltene Farbstoff ist Isödibenzanthron von der glei chen Reinheit wie das nach dem Verfahren des Hauptpatentes erhaltene Isodibenzan- thron. Es stellt ein dunkelviolettes Pulver dar, das sich in konzentrierter Schwefelsäure mit rein grüner Farbe löst und aus blauvio letter Hydrosulfitküpe Baumwolle rotstichig violett färbt.
An Stelle- von Äthylalkohol kann man auch andere Alkohole; an Stelle von Kali hydrat andere Ätzalkalien verwenden.
Additional patent to main patent no. 119233. Process for the preparation of isodibenzanthrone. The subject of this additional patent is a process for the preparation of isodibenzanthrone.
The procedure consists of getting Bzl-ethylbenzanthronyl sulfide of the formula:
EMI0001.0006
treated with an alkaline condensing agent, especially alcoholic alkali. <I> Example: </I> In a melt made up of 150 parts by weight of potassium hydrate and 150 parts by weight of ethyl alcohol, 30 parts by weight of Bzl-ethylbenzanthanyl sulfide are introduced at about 140 and stirred for about an hour at the same temperature. The melt is diluted with water and air is passed through the suspension obtained until there is no longer any dye in the form of the leuco compound. It is filtered and washed well with water.
The dye thus obtained is isodibenzanthrone of the same purity as the isodibenzanthrone obtained by the process of the main patent. It is a dark violet powder that dissolves in concentrated sulfuric acid with a pure green color and turns cotton reddish violet from the blue-violet hydrosulfite vat.
Instead of ethyl alcohol, other alcohols can also be used; use other caustic alkalis instead of potash hydrate.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH120720T | 1925-11-12 | ||
CH119233T | 1927-12-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH120720A true CH120720A (en) | 1927-07-01 |
Family
ID=25709227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH120720D CH120720A (en) | 1925-11-12 | 1925-11-12 | Process for the preparation of isodibenzanthrone. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH120720A (en) |
-
1925
- 1925-11-12 CH CH120720D patent/CH120720A/en unknown
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