CH130903A - Process for the production of a new dye. - Google Patents
Process for the production of a new dye.Info
- Publication number
- CH130903A CH130903A CH130903DA CH130903A CH 130903 A CH130903 A CH 130903A CH 130903D A CH130903D A CH 130903DA CH 130903 A CH130903 A CH 130903A
- Authority
- CH
- Switzerland
- Prior art keywords
- solution
- dye
- soda
- production
- new 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
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/14—Monoazo compounds
- C09B45/16—Monoazo compounds containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen Farbstoffes. Es wurde gefunden, dass man einen neuen Farbstoff erhält, wenn man den durch alka lische Kupplung erhaltenen Azofarbstoff aus dianotiertem 5-Nitro-2-a.minophenol und 2-Arnino-5-oxynaphthalin.-7-sulfosäuredurch sseh"indlung mit Fluorchrom und mittelst eines Backprozesses in dessen Chromverbin dung überführt.
Zur Herstellung der Backkuchen ist es zweckmässig, die Lösungen oder Suspensionen der Chromverbindungen der chromierbare Gruppen enthaltenden Azofarbstoffe in Ge genwart des Chromierungsmittels zur Trockne einzudampfen, wobei auch während dem Ein- dampfen teilweise Chromierung erfolgen 1u a.nn.
Der so erhaltene Farbstoff ist in Soda lösung und Natronlauge mit blauer Farbe lti@lioh. Mit Essigsäure neutralisiert, schlägt die Farbe der Lösung nach grünblau um. Wolle und Seide werden aus der Säurelösung in 1)1aiz#tichig grauen, Baumwolle aus der sodaalkalischen Lösung ebenfalls in denselben Tönen angefärbt.
Beispiel 4,04 Gewichtsteile des durch alkalische Kupplung erhaltenen Azofarbstoffes aus dianotiertem 5-Nitro-2-aminophenol und 2 Arnino-5-naphthol-7-sulfosäure werden in 400 Teilen Wasser kochend gelöst und mit. der 3,04 Teilen Cr"0, entsprechenden Menge Fluorchrom 24 Stunden unter Rückfluss ge kocht.
Nach dieser Zeit ist der anfänglich mit violetter, dann mit blauer Farbe gelöste Farbstoff zum grössten Teil aus der Reaktions lösung ausgefallen, und zwar in nicht fertil; chromierter Form. Die Reaktionslösung wird hierauf auf dem Dampfbad zur Trockne ver dampft, im Trockenschrank längere Zeit bei 1..15 bis<B>150'</B> gebacken und nach dem Back- prozess gemahlen.
Process for the production of a new dye. It has been found that a new dye is obtained if the azo dye obtained by alkali coupling from dianotated 5-nitro-2-a.minophenol and 2-amino-5-oxynaphthalene-7-sulfonic acid is treated with fluorochrome and converted into its chromium compound by means of a baking process.
To produce the baking cakes, it is expedient to evaporate the solutions or suspensions of the chromium compounds of the azo dyes containing chromable groups to dryness in the presence of the chromating agent, with partial chromizing also taking place during the evaporation.
The dye thus obtained is lti @ lioh in soda solution and sodium hydroxide solution with a blue color. Neutralized with acetic acid, the color of the solution changes to green-blue. Wool and silk are dyed from the acid solution in 1) gray, cotton from the soda-alkaline solution also in the same shades.
Example 4.04 parts by weight of the azo dye obtained by alkaline coupling from dianotized 5-nitro-2-aminophenol and 2-amino-5-naphthol-7-sulfonic acid are dissolved in 400 parts of boiling water and mixed with. the 3.04 parts of Cr "0, the corresponding amount of fluorochrome, refluxed for 24 hours.
After this time, most of the dye initially dissolved in violet, then in blue color has precipitated out of the reaction solution, namely in non-fertile; chromed shape. The reaction solution is then evaporated to dryness on the steam bath, baked in the drying cabinet for a long time at 1..15 to <B> 150 '</B> and then ground after the baking process.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH130903T | 1927-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH130903A true CH130903A (en) | 1929-01-15 |
Family
ID=4389203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH130903D CH130903A (en) | 1927-09-03 | 1927-09-03 | Process for the production of a new dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH130903A (en) |
-
1927
- 1927-09-03 CH CH130903D patent/CH130903A/en unknown
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