CH235446A - Process for the preparation of a trisazo dye. - Google Patents
Process for the preparation of a trisazo dye.Info
- Publication number
- CH235446A CH235446A CH235446DA CH235446A CH 235446 A CH235446 A CH 235446A CH 235446D A CH235446D A CH 235446DA CH 235446 A CH235446 A CH 235446A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- combined
- diazo
- acid
- amino
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B31/16—Trisazo dyes
- C09B31/22—Trisazo dyes from a coupling component "D" containing directive hydroxyl and amino groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 231710. Verfahren zur Herstellung eines Trisazofarbstoffes. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung eines Trisazo- farbstoffes, dadurch gekennzeichnet, dass man 1-Diazo-4-ogybenzol-3-carbonsäure in saurem Medium mit 1-Amino-naphthalin-7- sulfonsäure vereinigt, den so erhaltenen Aminoazofarbstoff diazotiert,
die Diazo- verbindung in saurem Medium ,mit 1-Amino- 2.5-dimethogybenzol vereinigt, wieder diazo- tiert und die Diazoverbindung des so erhal tenen Aminodisazofarbstoffes in alkalischem Medium mit 2@-Phenylamino-5-ogynaphthalin- 7-sulfonsäure vereinigt.
Der so erhaltene T.risazofarbstoff ist ein dunkles Pulver, das sich in Wasser mit grünstirchig blauer, in konzentrierter Schwe felsäure mit blauschwarzer Farbe -löst und Baumwolle in lebhaften grünstichngblauen lichtechten Tönen färbt. Die Färbungen wer den durch Nazhbehand-eln mit Chromi- oder Kupfersalzen sehr waschecht.
Beispiel: Die aus 15;3, Teilen 1-Amino-4-ogybenzol- 3-earbonsäure hergestellte Diazoverbindung wird in Gegenwart von überschüssigem Na triumacetat mit einer Lösung des Natrium- salzes. von 23,3 Teilen 1-Amino-naphthälin- 7 -oulfonsäure vereinigt.
Nach beendeter Kupplung wird .der Farbstoff durch Zugabe von Natronlauge gelöst und weiterdiazotiert. Die erhaltene Diazotierungsflüs:sigkeit ver- .eiuigt man mit einer salzsauren Lösung von etv#Ta 15 Teilen 1-Amino-2.5,dimethogyb-enzol, wobei die überschüssige Salzsäure durch Na triumacetat abgestumpft wird.
Nach beende ter Farbstoffbildun;g wird mit Soda neutra- lis.iert und der Farbstoff abgeschieden. Er löst sich in Natroulaüge mit violetter Farbe.
Durch Anrühren mit Eis und Salzsäure und Zugabe einer Lösung von Natriumnitrit wird der Farbstoff weiterdiazotiert. Die erhaltene Diazoverbindlung vereinigt man mit einer alkalischen Lösung von 32 Teilen 2-Phenyl- amino-5-oxynaphthalin-7-sulfonsäure. Der er haltene Trisazofarbstoff wind abgesichieden und getrocknet.
Additional patent to main patent no. 231710. Process for the production of a trisazo dye. The present patent relates to a process for the preparation of a trisazo dye, characterized in that 1-diazo-4-ogybenzene-3-carboxylic acid is combined with 1-amino-naphthalene-7-sulfonic acid in an acidic medium, and the aminoazo dye thus obtained is diazotized ,
the diazo compound in an acidic medium, combined with 1-amino-2,5-dimethogybenzene, again diazo- tated and the diazo compound of the aminodisazo dye thus obtained is combined in an alkaline medium with 2 @ -phenylamino-5-ogynaphthalene-7-sulfonic acid.
The T.risazo dye obtained in this way is a dark powder which dissolves in water with greenish blue, in concentrated sulfuric acid with a blue-black color and colors cotton in lively greenish blue, light-fast shades. The dyeings become very washable when treated with chromium or copper salts.
Example: The diazo compound prepared from 15; 3 parts of 1-amino-4-ogybenzene-3-carboxylic acid is trium acetate with a solution of the sodium salt in the presence of excess sodium. of 23.3 parts of 1-amino-naphthalenic-7-ulphonic acid combined.
After the coupling has ended, the dye is dissolved by adding sodium hydroxide solution and diazotized further. The diazotization liquid obtained is diluted with a hydrochloric acid solution of about 15 parts of 1-amino-2,5, dimethogybenzene, the excess hydrochloric acid being truncated by sodium acetate.
When the dye formation is complete, it is neutralized with soda and the dye is deposited. It dissolves in natroulas with a purple color.
The dye is further diazotized by stirring with ice and hydrochloric acid and adding a solution of sodium nitrite. The diazo compound obtained is combined with an alkaline solution of 32 parts of 2-phenylamino-5-oxynaphthalene-7-sulfonic acid. The trisazo dye he obtained winds separated and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE235446X | 1941-12-15 | ||
CH231710T | 1943-05-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH235446A true CH235446A (en) | 1944-11-30 |
Family
ID=25727617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH235446D CH235446A (en) | 1941-12-15 | 1942-12-05 | Process for the preparation of a trisazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH235446A (en) |
-
1942
- 1942-12-05 CH CH235446D patent/CH235446A/en unknown
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