CH124263A - Process for the preparation of 2,7-dimethylanthracene. - Google Patents
Process for the preparation of 2,7-dimethylanthracene.Info
- Publication number
- CH124263A CH124263A CH124263DA CH124263A CH 124263 A CH124263 A CH 124263A CH 124263D A CH124263D A CH 124263DA CH 124263 A CH124263 A CH 124263A
- Authority
- CH
- Switzerland
- Prior art keywords
- dimethylanthracene
- preparation
- highly porous
- elevated temperature
- porous substances
- Prior art date
Links
- CFDDCSMNZFPVTH-UHFFFAOYSA-N 2,7-dimethylanthracene Chemical compound C1=CC(C)=CC2=CC3=CC(C)=CC=C3C=C21 CFDDCSMNZFPVTH-UHFFFAOYSA-N 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 6
- 150000002576 ketones Chemical class 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000006798 ring closing metathesis reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung von 2,7-Dimethylanthracen. Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Darstellung von 2,7- Dimethylanthracen.
Es wurde gefunden, dass man 2,7-Dime- thylanthracen erhält, wenn man die Dämpfe von 2, 6, 5'-Triinethylbenzophenon bei erhöh ter Temperatur über hochporöse Stoffe leitet. Die Reaktion vollzieht sich hierbei so, dass unter Wasseraustritt Ringschluss erfolgt. Als hochporöse Stoffe kommen zum Beispiel aktive Kohle, Silica-Cxel oder Tonerde in Betracht. Zweckmässig verdünnt man die Ketondämpfe mit Luft und arbeitet in Ge genwart katalytisch wirkender Stoffe, wie zum Beispiel Kupfer, Cer und ihrer Salze.
<I>Beispiel:</I> Über einen in einem Kupfergefäss auf 4000 erhitzten Kontakt aus hochaktiver Kohle, wie sie aus Grudekoks durch Wasserdampfakti- vierung erhalten wird, werden die Dämpfe von 2, 5, 5'-Ti-imethylbenzophenwi mit etwas Luft gemischt geleitet.
Das Reaktionsprodukt wird kondensiert, der Kristallkuchen vom ge- bildeten Wasser abgetrennt, mit warmem Sprit verrieben und abgepresst. Das unver änderte alkohollösliche Keton geht zum Pro zess zurück, der Pressrückstand bildet tech nisch reines 2,7-Dimethylanthracen. Die Aus- beute beträgt 60 % der Theorie.
Process for the preparation of 2,7-dimethylanthracene. The present invention relates to a process for the preparation of 2,7-dimethylanthracene.
It has been found that 2,7-dimethylanthracene is obtained if the vapors of 2,6,5'-triinethylbenzophenone are passed over highly porous substances at an elevated temperature. The reaction takes place in such a way that ring closure occurs with the escape of water. Active carbon, silica-cxel or alumina can be considered as highly porous substances. It is advisable to dilute the ketone vapors with air and to work in the presence of catalytically active substances such as copper, cerium and their salts.
<I> Example: </I> The vapors of 2, 5, 5'-Ti-imethylbenzophenwi are mixed with a little air via a contact made of highly active carbon, such as is obtained from Grudekoks through steam activation, heated in a copper vessel mixed headed.
The reaction product is condensed, the crystal cake is separated from the water formed, rubbed with warm fuel and pressed out. The unchanged alcohol-soluble ketone goes back to the process, the residue from the press forms technically pure 2,7-dimethylanthracene. The yield is 60% of theory.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE124263X | 1925-04-24 | ||
| CH122062T | 1926-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH124263A true CH124263A (en) | 1928-01-16 |
Family
ID=25709830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH124263D CH124263A (en) | 1925-04-24 | 1926-04-20 | Process for the preparation of 2,7-dimethylanthracene. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH124263A (en) |
-
1926
- 1926-04-20 CH CH124263D patent/CH124263A/en unknown
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