CH145706A - Process for the preparation of a new vat dye. - Google Patents
Process for the preparation of a new vat dye.Info
- Publication number
- CH145706A CH145706A CH145706DA CH145706A CH 145706 A CH145706 A CH 145706A CH 145706D A CH145706D A CH 145706DA CH 145706 A CH145706 A CH 145706A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- lol
- vat dye
- orange
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines neuen liüpenfarbstoffes. Es wurde gefunden, dass man einen neuen wertvollen Küpenfarbstoff erhält, wenn man den durch Kondensation von 1 Mol 1-Halo- gen-anthrachinon-2-carbonsäure und 1 Mol 2-Aminoanthrachinon und nachfolgenden Ring schluss erhältlichen Farbstoff mit einem bro- mierend wirkenden Mittel behandelt.
Man kann die Bromierung in Gegenwart eines Lösungs- oder Verdünnungsmittels, zum Bei spiel Chlorsulfonsäure, Oleum, Schwefelsäure, Schwefelsäureinoriohydrat, Nitrobenzol usw., vornehmen, und arbeitet vorteilhaft in Ge genwart eines Katalysators, zum Beispiel Jod, Schwefel, Selen, Phosphor, Antimon, Mangan usw.
Das Reaktionsprodukt enthält 2 Brom atome im Molekül und löst sich in konzen trierter Schwefelsäure mit oranger Farbe, kristallisiert aus Nitrobenzol in roten Nädel- chen und färbt Baumwolle aus dunkelvioletter Küpe in kräftigen, vorzüglich echten, orange roten Tönen.
Beispiel: 45 Teile des durch Kondensation von 1 Mol 1-Halogenanthi-achinoii-2-carbonsäure und 1 Mol 2-Aminoantlirachiiion und nachfolgen den Ringschluss erhältlichen Farbstoffes wer den unter Rühren bei Zimmertemperatur in 450 Teilen Chlorsulfonsäure gelöst. Nach Zu gabe von 1,5 Teilen Jod und 5 Teilen Eisen lässt man 40 Teile Brom zufliessen, erhöht dann die Temperatur langsam auf 65-70 C und hält bei dieser Temperatur solange, bis die Hauptmenge des Broms aufgenommen ist.
Darauf lässt man erkalten, verdünnt mit 225 Teilen konzentrierter Schwefelsäure, giesst in Eiswasser, kocht kurz auf und saugt ab.
Process for the preparation of a new liüpen dye. It has been found that a new valuable vat dye is obtained if the dye obtainable by condensation of 1 mole of 1-halo-anthraquinone-2-carboxylic acid and 1 mole of 2-aminoanthraquinone and subsequent ring closure is combined with a brominating agent treated.
The bromination can be carried out in the presence of a solvent or diluent, for example chlorosulfonic acid, oleum, sulfuric acid, sulfuric acid inoriohydrate, nitrobenzene, etc., and is advantageously carried out in the presence of a catalyst, for example iodine, sulfur, selenium, phosphorus, antimony, Manganese etc.
The reaction product contains 2 bromine atoms in the molecule and dissolves in concentrated sulfuric acid with an orange color, crystallizes from nitrobenzene in red needles and dyes cotton from a dark purple vat in strong, exquisitely genuine, orange-red shades.
Example: 45 parts of the dye obtainable by condensation of 1 mole of 1-haloanthi-achinoii-2-carboxylic acid and 1 mole of 2-aminoantlirachiiion and subsequent ring closure are dissolved in 450 parts of chlorosulfonic acid with stirring at room temperature. After adding 1.5 parts of iodine and 5 parts of iron, 40 parts of bromine are allowed to flow in, the temperature is then slowly increased to 65-70 ° C. and held at this temperature until most of the bromine has been absorbed.
It is then allowed to cool, diluted with 225 parts of concentrated sulfuric acid, poured into ice water, briefly boiled and filtered off with suction.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE145706X | 1928-12-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH145706A true CH145706A (en) | 1931-03-15 |
Family
ID=5670928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH145706D CH145706A (en) | 1928-12-11 | 1929-11-19 | Process for the preparation of a new vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH145706A (en) |
-
1929
- 1929-11-19 CH CH145706D patent/CH145706A/en unknown
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