CH120717A - Process for the preparation of isodibenzanthrone. - Google Patents
Process for the preparation of isodibenzanthrone.Info
- Publication number
- CH120717A CH120717A CH120717DA CH120717A CH 120717 A CH120717 A CH 120717A CH 120717D A CH120717D A CH 120717DA CH 120717 A CH120717 A CH 120717A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- violet
- isodibenzanthrone
- bzl
- dissolves
- 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)
- Heat Sensitive Colour Forming Recording (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-Thioxylenylbenzanthron folgender Formel
EMI0001.0006
mit alkalischen Kondensationsmitteln, insbe sondere alkoholischem Alkali, behandelt.
<I>Beispiel:</I> In eine Schmelze von äthylalkoholischem Kali, hergestellt durch Erhitzen von 100 Ge wichtsteilen Kalihydrat und 100 Gewichts teilen Äthylalkohol auf 135 unter Abdestil- lieren des überschüssigen Alkohols, trägt man bei 135 bis 140 25 Gewichtsteile Bzl-Thio- xylenylbenzanthron, erhältlich zum Beispiel durch mehrstündiges Kochen von Bzl-Chlor- benzanthron mit Thioxylenol und Pottasche in Trichlorbenzollösung, -ein und rührt die Schmelze eine Stunde bei 140 .
Nach dieser Zeit verdünnt man mit Wasser, leitet in die Suspension Luft ein, solange noch Farbstoff in Form der Hydroverbindung in Lösung ist, filtriert und wäscht mit Wasser gut aus. Der erhaltene Farbstoff ist Isodibenzanthron, welches praktisch vollständig frei von Di- benzanthron ist. Er stellt ein dunkelviolettes Pulver dar, das sich in konzentrierter Schwe felsäure mit rein grüner Farbe löst und Baumwolle aus blauvioletter Hydrosulfit- küpe rotstichig violett färbt.
An Stelle von Äthylalkohol kann man auch andere Alkohole, an Stelle von Kali hydrat andere Ätzalkalien verwenden.
Additional patent to the 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 in that you get Bzl-Thioxylenylbenzanthron following formula
EMI0001.0006
treated with alkaline condensation agents, in particular special alcoholic alkali.
<I> Example: </I> In a melt of ethyl alcoholic potash, produced by heating 100 parts by weight of potassium hydrate and 100 parts by weight of ethyl alcohol to 135 while distilling off the excess alcohol, 25 parts by weight of Bzl-Thio are added at 135 to 140 xylenylbenzanthrone, obtainable, for example, by boiling Bzl-chlorobenzanthrone with thioxylenol and potash in trichlorobenzene solution for several hours, and stir the melt for one hour at 140.
After this time, it is diluted with water, air is passed into the suspension while the dye is still in solution in the form of the hydrocompound, filtered and washed thoroughly with water. The dye obtained is isodibenzanthrone, which is practically completely free from dibenzanthrone. It is a dark violet powder that dissolves in concentrated sulfuric acid with a pure green color and turns cotton from a blue-violet hydrosulfite vat into a reddish violet.
Instead of ethyl alcohol, other alcohols can 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 |
---|---|---|---|
CH120717T | 1925-11-02 | ||
CH119233T | 1927-12-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH120717A true CH120717A (en) | 1927-07-01 |
Family
ID=25709224
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH120717D CH120717A (en) | 1925-11-02 | 1925-11-02 | Process for the preparation of isodibenzanthrone. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH120717A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1123285B (en) * | 1959-07-28 | 1962-02-08 | Basf Ag | Dyeing and printing of structures made of linear fiber-forming polyesters |
-
1925
- 1925-11-02 CH CH120717D patent/CH120717A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1123285B (en) * | 1959-07-28 | 1962-02-08 | Basf Ag | Dyeing and printing of structures made of linear fiber-forming polyesters |
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