CH178942A - Process for the production of a new intermediate product. - Google Patents
Process for the production of a new intermediate product.Info
- Publication number
- CH178942A CH178942A CH178942DA CH178942A CH 178942 A CH178942 A CH 178942A CH 178942D A CH178942D A CH 178942DA CH 178942 A CH178942 A CH 178942A
- Authority
- CH
- Switzerland
- Prior art keywords
- sulfuric acid
- product
- mixture
- production
- potassium hydroxide
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/587—Unsaturated compounds containing a keto groups being part of a ring
- C07C49/657—Unsaturated compounds containing a keto groups being part of a ring containing six-membered aromatic rings
- C07C49/665—Unsaturated compounds containing a keto groups being part of a ring containing six-membered aromatic rings a keto group being part of a condensed ring system
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellun, eines neuen Zwischenproduktes. Es wurde gefunden, dass man ein neues Zwischenprodukt für die Herstellung von Farbstoffen erhält, wenn man das Gemisch der Methylbenzanthrone, die der allgemeinen Formel
EMI0001.0005
entsprechen, in welcher zwei x für Wasser stoffatome und das dritte x für eine Methyl- gruppe stehen und das erhalten wird durch Entfernen des 2-älethylbenzanthrons aus dem Benzanthrongemisch, das durch Einwirken lassen von Glyzerin und Schwefelsäure auf 2-Methylanthraclrinorr entsteht,
in Gegenwart einer Schwefelsäure, deren Gehalt 95 /o nicht übersteigt, mit Brom zu einem Mono bromierungsprodukt bromiert. Das neue Produkt löst sich in Schwefel säure mit roter Farbe und schwach gelber Fluoreszenz, durch Kondensation mit 1-Amino- anthrachinon und Verschmelzen des Konden sationsproduktes mit alkoholischem Kalium hydroxyd wird es in einen olivfärbenden Küpenfarbstoff, durch Behandeln mit Schwe fel und Verschmelzen des so erhaltenen Bz' - Bz" - Dibenzanthronylsulfidgemisches mit alkoholischem Kaliumhydroxyd wird es in einen,
in sehr reinen violettblauen Tönen färbenden, Küpenfarbstoff umgewandelt.
<I>Beispiel:</I> 100 Teile des Gerniscbes der Methylben- zanthrone, die der allgemeinen Formel
EMI0001.0024
in welcher zwei x für Wasserstoffatome und das dritte x für eine Methylgruppe stehen, entsprechen, werden in 1000 Teilen 90 o/oiger Schwefelsäure kalt gelöst und bei<B>55"</B> mit 72 Teilen Brom versetzt.
Man hält 4 Stun den bei dieser Temperatur, kühlt ab, trägt auf eine Mischung von Eis und Natrium- bisulfitlösung aus, filtriert, wäscht mit Wasser neutral und trocknet. 11T an erhält ein gelb olives Pulver, dessen Bromgehalt annähernd demjenigen eines Monobrommethylbenzan- throns entspricht.
Process for the production of a new intermediate product. It has been found that a new intermediate product for the preparation of dyes is obtained if one uses the mixture of methylbenzanthrones corresponding to the general formula
EMI0001.0005
in which two x stand for hydrogen atoms and the third x stand for a methyl group and this is obtained by removing the 2-ethylbenzanthrone from the benzanthrone mixture, which is formed by allowing glycerine and sulfuric acid to act on 2-methylanthraclrinorr,
brominated with bromine in the presence of a sulfuric acid, the content of which does not exceed 95%, to give a monobromination product. The new product dissolves in sulfuric acid with a red color and pale yellow fluorescence, by condensation with 1-amino anthraquinone and fusing of the condensation product with alcoholic potassium hydroxide, it becomes an olive-colored vat dye, by treating with sulfur and fusing the resultant Bz '- Bz "- Dibenzanthronylsulfidgemisches with alcoholic potassium hydroxide it is in a,
transformed into very pure purple-blue tones, vat dye.
<I> Example: </I> 100 parts of the mixture of methylbenzanthrones, that of the general formula
EMI0001.0024
in which two x stand for hydrogen atoms and the third x stand for a methyl group, are dissolved in 1000 parts of 90% sulfuric acid in the cold, and 72 parts of bromine are added at 55 ".
It is kept for 4 hours at this temperature, cooled, poured onto a mixture of ice and sodium bisulfite solution, filtered, washed neutral with water and dried. 11T an receives a yellow olive powder, the bromine content of which corresponds approximately to that of a monobromomethylbenzanthrone.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH176020T | 1934-03-17 | ||
CH178942T | 1934-03-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH178942A true CH178942A (en) | 1935-08-15 |
Family
ID=25719775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH178942D CH178942A (en) | 1934-03-17 | 1934-03-17 | Process for the production of a new intermediate product. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH178942A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2456589A (en) * | 1944-03-23 | 1948-12-14 | American Cyanamid Co | Gray vat dyestuffs and method of making the same |
EP0005757A1 (en) * | 1978-05-26 | 1979-12-12 | Bayer Ag | Process for preparing benzanthrones |
US4812393A (en) * | 1986-01-31 | 1989-03-14 | Eastman Kodak Company | Fluorescent dyes and biological and analytical uses thereof |
US4927927A (en) * | 1986-01-31 | 1990-05-22 | Eastman Kodak Company | Fluorescent dyes and biological and analytical uses thereof |
-
1934
- 1934-03-17 CH CH178942D patent/CH178942A/en unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2456589A (en) * | 1944-03-23 | 1948-12-14 | American Cyanamid Co | Gray vat dyestuffs and method of making the same |
EP0005757A1 (en) * | 1978-05-26 | 1979-12-12 | Bayer Ag | Process for preparing benzanthrones |
US4812393A (en) * | 1986-01-31 | 1989-03-14 | Eastman Kodak Company | Fluorescent dyes and biological and analytical uses thereof |
US4927927A (en) * | 1986-01-31 | 1990-05-22 | Eastman Kodak Company | Fluorescent dyes and biological and analytical uses thereof |
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