AT53785B - Process for the representation of tri- and tetrahalogenindigo. - Google Patents
Process for the representation of tri- and tetrahalogenindigo.Info
- Publication number
- AT53785B AT53785B AT53785DA AT53785B AT 53785 B AT53785 B AT 53785B AT 53785D A AT53785D A AT 53785DA AT 53785 B AT53785 B AT 53785B
- Authority
- AT
- Austria
- Prior art keywords
- tri
- indigo
- tetrahalogenindigo
- representation
- sulfuric acid
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 5
- 235000000177 Indigofera tinctoria Nutrition 0.000 claims description 7
- 229940097275 indigo Drugs 0.000 claims description 7
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 claims description 7
- ZLHGTHCCYUEAIK-UHFFFAOYSA-N 5,7-dibromo-2-(5,7-dibromo-3-hydroxy-1H-indol-2-yl)indol-3-one Chemical compound [O-]c1c([nH]c2c(Br)cc(Br)cc12)C1=[NH+]c2c(cc(Br)cc2Br)C1=O ZLHGTHCCYUEAIK-UHFFFAOYSA-N 0.000 claims description 3
- 125000003963 dichloro group Chemical group Cl* 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims 1
- 238000012986 modification Methods 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 5
- 238000003756 stirring Methods 0.000 description 3
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 125000000950 dibromo group Chemical group Br* 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Indole Compounds (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Darstellung von Tri- und Tetrahalogenindigo.
In der Stammpatentschrift Nr. 53532 wurde unter anderem ein Verfahren zur Darstellung von Tri-und Tetrabromindigo beschrieben, das in der Einwirkung von Brom auf Mono-oder Dibromindigo bei Gegenwart von konzentrierter Schwefelsäure besteht.
Es wurde jetzt gefunden, dass sich das gleiche Verfahren auch auf Monochlor- und Dichlorindigo unter Erzielung des betreffenden gemischten Tri- und Tetrahalogenindigo anwenden lässt.
Beispiel :
100 Teile fein gepulverter Mt-Dichtorindigo werden in die 25faehe Menge kalte konzentrierte Schwefelsäure (93%), die mit 110 kg Brom versetzt ist, unter lebhaftem Rühren eingetragen. Nach einstündigem Rühren steigert man die Temperatur innerhalb zweier Stunden auf 450 und lässt die Reaktion bei dieser Temperatur unter andauerndem kräftigen Rühren sich vollenden, was nach zirka 7 bis 8 Stunden eingetreten ist. Der erhaltene Dibromdichloriadigo wird durch Eingiessen der Reaktionsmasse in Wasser und die übliche Nachnehandlung isoliert. Der Farbstoff liefert etwas rötere Nuancen als der Tetrabromindigo des Stammpatentes und steht ihm auch in seinen sonstigen Eigenschaften nahe.
Statt der 930/oigen Schwefelsäure kann man auch etwas konzentriertere Schwefelsäure, z. B 960/oige, verwenden ; es ist jedoch nicht zu empfehlen, wesentlich unter 93 /oige oder
EMI1.1
Bei Ersatz dos Dichlorindigos durch den Monochlorindigo erhält man in analoger Weise Tri-bzw. Dibromchlorindigo.
In ihren Eigenschaften stehen diese Farbstoffe dem Produkte des Beispiels sehr nahe.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for the representation of tri- and tetrahalogenindigo.
In the parent patent specification No. 53532, among other things, a process for the preparation of tri- and tetrabromo indigo was described, which consists in the action of bromine on mono- or dibromo indigo in the presence of concentrated sulfuric acid.
It has now been found that the same process can also be applied to monochloro and dichloro indigo to obtain the mixed tri and tetra halo indigo in question.
Example:
100 parts of finely powdered Mt-Dichtorindigo are added to the 25faehe amount of cold, concentrated sulfuric acid (93%) to which 110 kg of bromine have been added, with vigorous stirring. After stirring for one hour, the temperature is increased to 450 within two hours and the reaction is allowed to complete at this temperature with continued vigorous stirring, which occurred after about 7 to 8 hours. The dibromodichloriadigo obtained is isolated by pouring the reaction mass into water and the customary post-treatment. The dye provides slightly redder nuances than the tetrabromo indigo of the parent patent and is also close to it in its other properties.
Instead of the 930% sulfuric acid one can also use slightly more concentrated sulfuric acid, e.g. B 960 / oige, use; However, it is not recommended to be significantly below 93 / oige or
EMI1.1
If the dichloro indigo is replaced by the monochloro indigo, tri or. Dibromochloroindigo.
In terms of their properties, these dyes are very close to the product of the example.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE53785X | 1908-01-24 | ||
| AT53532D AT53532B (en) | 1907-10-04 | 1909-01-18 | Process for the representation of tri- and tetrabromo indigo. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT53785B true AT53785B (en) | 1912-06-10 |
Family
ID=25602100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT53785D AT53785B (en) | 1908-01-24 | 1909-01-18 | Process for the representation of tri- and tetrahalogenindigo. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT53785B (en) |
-
1909
- 1909-01-18 AT AT53785D patent/AT53785B/en active
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