CH157669A - A process for preparing the 1: 2: 2 ': 1'-azine anthraquinoneanthrahydroquinone disulfuric ester. - Google Patents
A process for preparing the 1: 2: 2 ': 1'-azine anthraquinoneanthrahydroquinone disulfuric ester.Info
- Publication number
- CH157669A CH157669A CH157669DA CH157669A CH 157669 A CH157669 A CH 157669A CH 157669D A CH157669D A CH 157669DA CH 157669 A CH157669 A CH 157669A
- Authority
- CH
- Switzerland
- Prior art keywords
- azine
- ester
- anthraquinoneanthrahydroquinone
- esters
- disulfuric
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Procédé de préparation de l'ester disulfurique de l'anthraquinoneanthrahydroqui- none 1: 2 : 2': 1'-azine. On sait déjà fabriquer et appliquer des esters sulfuriques des indanthrones réduites, esters que l'on croît être les esters tétra- sulfuriques des tétrahydrodianthraquinone- 1 : 2 : 2' : l'-azines.
On a constaté que ces esters tétrasulfuri- ques des tétrahydrodiianthraquinoneazines peuvent être convertis en de nouveaux esters qui semblent être les esters tétrasulfuriques des tétrahydrodianthraquinonedihydroazines. On a également constaté que des esters t6tra- sulfuriques peuvent être transformés en en core d'autres nouveaux esters qui semblent être des esters trisulfuriques et que ces esters trisulfuriques peuvent être convertis en de nouveaux esters disulfuriques.
La présente invention est relative à un procédé de fabrication de l'ester disulfu- rique -de l'anthraquinoneanthrahydroquinone- 1 : 2 :29' : 1'-azine, selon lequel on soumet l'ester surfurique d e la. dianthrahydroqui- none-1 : 2 : ?' : l'-azine en milieu alcalin à l'action d'un agent d'oxydation.
L'exemple suivant, dans lequel les parties sont en poids, explique l'invention sans la limiter.
Exemple: 200 parties d'une pâte d'ester trisul- furique de la tétrahydrodianthraquinone- 1 : 2 :2' : l'-azine à<B>10%</B> (calculés sous forme d'indanthrone) sont chauffées à 50 C avec 400 parties d'eau et 50 parties d'une solution de soude caustique à<B>30%</B> et l'on ajoute graduellement 12,5 parties de persul- fate de potassium. Lorsque l'addition est terminée, la température est portée à 70 pendant 1/@ heure.
La liqueur est alors satu rée de sel et filtrée, la matière ayant déposé sur le filtre,est lavée avec une solution de sel contenant un peu d'alcali. L'ester trisulfurique de la tétrahydro- dianthraquinoneazine utilisé comme matière première, peut être obtenu par oxydation al caline de la dihydroazine correspondante.
Le procédé d'application diffère de celui (les autres esters sulfuriques, du fait qu'un acide froid est suffisant pour l'opération, l'addition d'un agent oxydant n'étant pas nécessaire.
A process for the preparation of anthraquinoneanthrahydroquinone 1: 2: 2 ': 1'-azine disulfuric ester. It is already known to make and apply sulfuric esters of reduced indanthrones, esters believed to be tetra-sulfuric esters of tetrahydrodianthraquinone- 1: 2: 2 ': -azines.
It has been found that these tetrasulfuric esters of tetrahydrodianthraquinoneazines can be converted to new esters which appear to be the tetrasulfuric esters of tetrahydrodianthraquinonedihydroazines. It has also been found that tetra-sulfuric esters can be converted to further other new esters which appear to be trisulfuric esters and that these trisulfuric esters can be converted to new disulfuric esters.
The present invention relates to a process for the manufacture of the disulfuric ester of anthraquinoneanthrahydroquinone- 1: 2: 29 ': 1'-azine, according to which the superfuric ester of the. dianthrahydroqui- none-1: 2:? ' : -azine in an alkaline medium with the action of an oxidizing agent.
The following example, in which the parts are by weight, explains the invention without limiting it.
Example: 200 parts of a paste of trisulfuric ester of tetrahydrodianthraquinone- 1: 2: 2 ': <B> 10% </B> -azine (calculated as indanthrone) are heated to 50 C with 400 parts of water and 50 parts of a <B> 30% </B> caustic soda solution, and 12.5 parts of potassium persulfate are gradually added. When the addition is complete, the temperature is raised to 70 for 1 / @ hour.
The liquor is then saturated with salt and filtered, the material having deposited on the filter, is washed with a salt solution containing a little alkali. The trisulfuric ester of tetrahydro- dianthraquinoneazine used as a raw material can be obtained by alkaline oxidation of the corresponding dihydroazine.
The method of application differs from that (other sulfuric esters, since a cold acid is sufficient for the operation, the addition of an oxidizing agent is not necessary.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB157669X | 1930-06-13 | ||
| GB100231X | 1931-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH157669A true CH157669A (en) | 1932-10-15 |
Family
ID=26247175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH157669D CH157669A (en) | 1930-06-13 | 1931-06-13 | A process for preparing the 1: 2: 2 ': 1'-azine anthraquinoneanthrahydroquinone disulfuric ester. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH157669A (en) |
-
1931
- 1931-06-13 CH CH157669D patent/CH157669A/en unknown
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