CH145317A - Process for the preparation of an azophthalein dye. - Google Patents
Process for the preparation of an azophthalein dye.Info
- Publication number
- CH145317A CH145317A CH145317DA CH145317A CH 145317 A CH145317 A CH 145317A CH 145317D A CH145317D A CH 145317DA CH 145317 A CH145317 A CH 145317A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- azophthalein
- acid
- green
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Azoplitaleinfarbstoffe,. Gegenstand dieser Erfindung ist ein Ver fahren zur Darstellung eines Azophtalein- farbstoffes von nachstehender Formel:
EMI0001.0005
welches dadurch gekennzeichnet ist, dass man den Monoazofarbstoff aus 1 : 2 : 4-Amido- naphtolsulfosäure und Resorcin mit Dimethyl- amido-m-oxybenzoylbenzoesäure im Verhältnis gleicher Moleküle kondensiert.
<I>Beispiel:</I> 36 Teile des Farbstoffes aus 1: 2:4-Amido- naphtolsulfosäure und Resorcin werden mit 25,5 Teilen Dimethylamido-m-oxybenzoyl- benzoesäure vermischt und eingetragen in 300 Teile konzentrierter Schwefelsäure. Man rührt 7 Stunden bei 70 und giesst hierauf in Wasser; die FarbStoffSärrre fällt vollständig aus.
Sie bildet getrocknet ein bronzierendes Pulver, das in Wasser auf Zusatz von Al- kalien rein grünstichig blau, in konzentrierter Schwefelsäure grün löslich ist. Die nach. chromierten oder nachgekupferten Färbungen auf Wolle und Seide des nach bekannten Verfahren in das Alkalisalz übergeführten Farbstoffes sind grünblau und besitzen her vorragende Echtheitseigenschaften.
Process for the preparation of an azoplitalein dye. The subject of this invention is a process for the preparation of an azophtalein dye of the following formula:
EMI0001.0005
which is characterized in that the monoazo dye from 1: 2: 4-amidonaphthol sulfonic acid and resorcinol is condensed with dimethylamido-m-oxybenzoylbenzoic acid in a ratio of the same molecules.
<I> Example: </I> 36 parts of the dye from 1: 2: 4-amidonaphthol sulfonic acid and resorcinol are mixed with 25.5 parts of dimethylamido-m-oxybenzoylbenzoic acid and added to 300 parts of concentrated sulfuric acid. The mixture is stirred for 7 hours at 70 and then poured into water; the FarbStoffSärrre fails completely.
When dried, it forms a bronzing powder which, with the addition of alkalis, is purely greenish blue in water, and green in concentrated sulfuric acid. The after. Chromed or re-coppered dyeings on wool and silk of the dye converted into the alkali salt by known processes are green-blue and have excellent fastness properties.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE145317X | 1928-05-24 | ||
CH142447T | 1929-05-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH145317A true CH145317A (en) | 1931-02-15 |
Family
ID=25714066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH145317D CH145317A (en) | 1928-05-24 | 1929-05-21 | Process for the preparation of an azophthalein dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH145317A (en) |
-
1929
- 1929-05-21 CH CH145317D patent/CH145317A/en unknown
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