CH145324A - Process for the preparation of an azophthalein dye. - Google Patents
Process for the preparation of an azophthalein dye.Info
- Publication number
- CH145324A CH145324A CH145324DA CH145324A CH 145324 A CH145324 A CH 145324A CH 145324D A CH145324D A CH 145324DA CH 145324 A CH145324 A CH 145324A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- acid
- azophthalein
- amido
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Azophtaleinfarbstoffes. Gegenstand dieser Erfindung ist ein Ver fahren zur Darstellung eines Azoplitalein- farbstoffes von nachstehender Formel:
EMI0001.0004
welches dadurch gekennzeichnet ist, dass man den Monoazofarbstoff aus Amido-o-kresol- sulfosäure und Resorcin mit Dimethylamido- zn-oxybenzoylbenzoesäure im Verhältnis glei cher Moleküle kondensiert.
<I>Beispiel:</I> 82,4 Teile des Farbstoffes aus Amido-o- kresolsulfosäure und Resorcin werden mit 28,5 Teilen Dimetllylamido-m-oxybenzoyl- benzoesäure vermischt und eingetragen in .300 Teile konzentrierter Schwefelsäure. Nach 24-stündigem Rühren bei 8:5 " giesst. man ü1 Wasser; die Farbstoffsäure fällt vollständig aus. Sie bildet ein bronzierendes Pulver, das in Wasser auf Zusatz von Alkalien violett, in konzentrierter Schwefelsäure rotorange löslich ist.
Die nachchromierten oder nach- gekupferten Färbungen auf Wolle und Seide des nach bekannten Verfahren in das All,#ali- salz übergeführten Farbstoffes sind blau und besitzen gute Echtheitseigenschaften.
Process for the preparation of an azophthalein dye. The subject of this invention is a process for the preparation of an azoplitalein dye of the following formula:
EMI0001.0004
which is characterized in that the monoazo dye from amido-o-cresol-sulfonic acid and resorcinol is condensed with dimethylamido-zn-oxybenzoylbenzoic acid in a ratio of the same molecules.
<I> Example: </I> 82.4 parts of the dye from amido-o-cresolsulfonic acid and resorcinol are mixed with 28.5 parts of dimethyllamido-m-oxybenzoylbenzoic acid and introduced into 300 parts of concentrated sulfuric acid. After stirring at 8: 5 "for 24 hours, water is poured; the dye acid precipitates completely. It forms a bronzing powder which, when alkalis are added, is violet in water and red-orange in concentrated sulfuric acid.
The re-chromed or re-coppered dyeings on wool and silk of the dye, which has been converted into space, # ali salt by known processes, are blue and have good fastness properties.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE145324X | 1928-05-24 | ||
CH142447T | 1929-05-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH145324A true CH145324A (en) | 1931-02-15 |
Family
ID=25714073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH145324D CH145324A (en) | 1928-05-24 | 1929-05-21 | Process for the preparation of an azophthalein dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH145324A (en) |
-
1929
- 1929-05-21 CH CH145324D patent/CH145324A/en unknown
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