CH275081A - Process for the preparation of a stilbene dye. - Google Patents
Process for the preparation of a stilbene dye.Info
- Publication number
- CH275081A CH275081A CH275081DA CH275081A CH 275081 A CH275081 A CH 275081A CH 275081D A CH275081D A CH 275081DA CH 275081 A CH275081 A CH 275081A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- copper
- new
- stilbene dye
- 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
- C09B56/00—Azo dyes containing other chromophoric systems
- C09B56/04—Stilbene-azo dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 272569.. <B>Verfahren zur Darstellung</B> eines Stilbenfarbatoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Darstellung eines neuen Stilbenfarbstoffes, welches dadurch gekenn zeichnet ist, dass man 4,4'-Dinitrostilben-2,2'- disulfonsäure mit 4-Metliylamino-2-methoxy- 2'-oxy - 5'- chlor -1,1' - azobenzol - 3'-sulfonsäure kondensiert und das Kondensationsprodukt mit kupferabgebenden Mitteln in den Kupfer lack überführt.
Der neue Farbstoff stellt getrocknet ein dunkles Pulver dar, das sich in konzentrierter Schwefelsäure mit blauer Farbe löst und auf Baumwolle ein gut lichtechtes Grauviolett färbt.
Beispiel: 37,2 Teile des Aminoazofarbstoffes, her gestellt durch Kuppeln von diazotierter 2- Amino-4-chlor-l-oxybenzol-6-sulfonsäure auf -Methylamino-3-methoxybenzol in saurer Lö sung, werden mit 47,4 Teilen 4,4'-dinitrostil- ben-2,2'-disulfonsaurem Natrium in 600 Tei len Natronlauge von 51/o durch achtstündiges Kochen kondensiert. Der Farbstoff wird clnreh Aussalzen und Abstumpfen der Natron lauge gefällt und hierauf abgesaugt.
Der feuchte Filterküchen des Farbstoffes wird in etwa 2000 Teilen Wasser heiss gelöst; zu dieser Lösung gibt man ammoniakalische Kupfersulfatlösung entsprechend 25 g Kup fersulfat krist. und erhitzt dann einige Stun den auf 90 bis<B>950.</B> Die Kupferverbindung des Farbstoffes wird dann ausgesalzen, abfiltriert und getrocknet.
Der neue Farbstoff stellt getrocknet ein dunkles Pulver dar, das sich in konzentrierter Schwefelsäure mit blauer Farbe löst und auf Baumwolle ein gut lichtechtes Grauviolett färbt.
<B> Additional patent </B> to main patent no. 272569 .. <B> Process for the representation </B> of a stilbene color. The subject of the present patent is a process for the preparation of a new stilbene dye, which is characterized in that 4,4'-dinitrostilbene-2,2'-disulfonic acid with 4-metliylamino-2-methoxy-2'-oxy - 5 ' - chlorine -1,1 '- azobenzene - 3'-sulfonic acid condenses and the condensation product is converted into the copper lacquer with copper-releasing agents.
When dried, the new dye is a dark powder that dissolves in concentrated sulfuric acid with a blue color and dyes a light-fast gray-violet on cotton.
Example: 37.2 parts of the aminoazo dye, made by coupling diazotized 2-amino-4-chloro-1-oxybenzene-6-sulfonic acid to methylamino-3-methoxybenzene in acidic solution, are mixed with 47.4 parts of 4, 4'-dinitrostilben-2,2'-disulfonic acid sodium in 600 parts of 51 / o sodium hydroxide solution condensed by boiling for eight hours. The dye is precipitated by salting out and blunting the caustic soda and then filtered off with suction.
The damp filter kitchen of the dye is dissolved in about 2000 parts of hot water; ammoniacal copper sulfate solution corresponding to 25 g of crystalline copper sulfate is added to this solution. and then heated for a few hours to 90 to 950. The copper compound of the dye is then salted out, filtered off and dried.
When dried, the new dye is a dark powder that dissolves in concentrated sulfuric acid with a blue color and dyes a light-fast gray-violet on cotton.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH272569T | 1944-01-10 | ||
CH275081T | 1944-01-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH275081A true CH275081A (en) | 1951-04-30 |
Family
ID=25731374
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH275081D CH275081A (en) | 1944-01-10 | 1944-01-10 | Process for the preparation of a stilbene dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH275081A (en) |
-
1944
- 1944-01-10 CH CH275081D patent/CH275081A/en unknown
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