CH308432A - Process for the preparation of a metal-containing azo dye. - Google Patents
Process for the preparation of a metal-containing azo dye.Info
- Publication number
- CH308432A CH308432A CH308432DA CH308432A CH 308432 A CH308432 A CH 308432A CH 308432D A CH308432D A CH 308432DA CH 308432 A CH308432 A CH 308432A
- Authority
- CH
- Switzerland
- Prior art keywords
- copper
- sulfonic acid
- azo dye
- releasing agent
- metal
- 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
- C09B31/02—Disazo dyes
- C09B31/08—Disazo dyes from a coupling component "C" containing directive hydroxyl and amino groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyridine Compounds (AREA)
Description
<B>Zusatzpatent</B> ztnn Hauptpatent Nr. 305716. Verfahren zur Herstellung eines metallhaltigen Azofarbatoffes. Es wurde gefunden, dass man zu einem langt, wenn man den Azofarbstoff der Formel
EMI0001.0005
in welcher die Sulfonsäuregruppe dieselbe Stellung einnimmt wie die Sulfonsäuregruppe (ler durch Sulfonierung von 2-(4'-Amino- pheny 1)-6-methylbenzthiazol mit konzentrier-
EMI0001.0013
ter <SEP> Schwefelsäure <SEP> erhältlichen <SEP> Sulfonsäure,
<SEP> in wertvollen metallhaltigen Azofarbstoff ge- von 100 in wässrigem Medium durchzuführen. Von besonderem Vorteil ist hier das an sich bekannte Verfahren, wonach in Gegenwart von , Oxyalkylaminen, insbesondere Äthanolamin
EMI0001.0018
bzw. <SEP> den <SEP> sich <SEP> davon <SEP> ableitenden <SEP> Kupferkom- verseift.
Der Aminomonoazofarbstoff wird aus dem Gemisch abgetrennt, in Wasser unter Zu satz von Natriumhydroxyd bis zur schwach alkalischen Reaktion gelöst, mit S Teilen Na triumnitrit versetzt und durch Eingiessen von 30 Teilen 30%iger Salzsäure weiterdiazotiert. Man rührt \? Stunden bei etwa 35 und kup pelt die Diazoverbindung in natriumcarbonat- oder natriumbicarbonatalkaliseher Lösung mit 39 Teilen 2-Phenylamino-S-oxynaphtha.lin- 6,
3'-disulfonsäure. Die Kupplung wird durch Zusatz von wenig Pyridin oder Picolin stark beschleunigt. Nach beendeter Kupplung wird der Disazofarbstoff aasgesalzen und abfil- triert. Die Farbstoffpaste wird in 1500 Teilen Wasser unter Zusatz von 30 Teilen 3lono- äthanolamin gelöst und die Lösung mit einer ammoniakalischen Lösung von Kupfersulfat (entsprechend 27,
5 Teile CuS0.t. 5 H.0) ver setzt. a Man behandelt. unter Riiekflusskühlung 6 bis 8 Stunden bei 95 . Die entstandene Kup- ferkomplexverbindun- wird aasgesalzen, ab filtriert und getrocknet.
<B> Additional patent </B> ztnn main patent No. 305716. Process for the production of a metal-containing azo carbate. It has been found that one can get by using the azo dye of the formula
EMI0001.0005
in which the sulfonic acid group occupies the same position as the sulfonic acid group (ler by sulfonation of 2- (4'-aminopheny 1) -6-methylbenzothiazole with concentrated
EMI0001.0013
the <SEP> sulfuric acid <SEP> available <SEP> sulfonic acid,
<SEP> in valuable metal-containing azo dye ge of 100 in an aqueous medium. The process known per se, according to which, in the presence of, oxyalkylamines, in particular ethanolamine, is particularly advantageous here
EMI0001.0018
or <SEP> the <SEP> <SEP> derived from <SEP> <SEP> copper-saponified.
The aminomonoazo dye is separated off from the mixture, dissolved in water with the addition of sodium hydroxide until a weakly alkaline reaction, mixed with S parts of sodium nitrite and further diazotized by pouring in 30 parts of 30% hydrochloric acid. One stirs \? Hours at about 35 and couples the diazo compound in sodium carbonate or sodium bicarbonate alkali solution with 39 parts of 2-phenylamino-S-oxynaphtha.lin- 6,
3'-disulfonic acid. The coupling is greatly accelerated by adding a little pyridine or picoline. After the coupling has ended, the disazo dye is salted ashes and filtered off. The dye paste is dissolved in 1500 parts of water with the addition of 30 parts of 3lonoethanolamine and the solution with an ammoniacal solution of copper sulfate (corresponding to 27,
5 parts CuS0.t. 5 H.0). a Man treated. with reverse flow cooling for 6 to 8 hours at 95. The resulting copper complex compound is salted, filtered off and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH308432T | 1951-12-21 | ||
CH305716T | 1952-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH308432A true CH308432A (en) | 1955-07-15 |
Family
ID=25734979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH308432D CH308432A (en) | 1951-12-21 | 1951-12-21 | Process for the preparation of a metal-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH308432A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115521193A (en) * | 2022-09-30 | 2022-12-27 | 陕西蒲城海泰新材料产业有限责任公司 | Industrial preparation method of 3,3',6,6' -tetramethoxy-2,2 ' -binaphthyl |
-
1951
- 1951-12-21 CH CH308432D patent/CH308432A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115521193A (en) * | 2022-09-30 | 2022-12-27 | 陕西蒲城海泰新材料产业有限责任公司 | Industrial preparation method of 3,3',6,6' -tetramethoxy-2,2 ' -binaphthyl |
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