CH265405A - Process for the preparation of a new monoazo dye. - Google Patents
Process for the preparation of a new monoazo dye.Info
- Publication number
- CH265405A CH265405A CH265405DA CH265405A CH 265405 A CH265405 A CH 265405A CH 265405D A CH265405D A CH 265405DA CH 265405 A CH265405 A CH 265405A
- Authority
- CH
- Switzerland
- Prior art keywords
- sulfuric acid
- new
- monoazo dye
- oxyethyl
- preparation
- 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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
- C09B29/08—Amino benzenes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen Monoazofarbstoffes. Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines neuen Azo- farbstoffes, gemäss welchem N-ss-Oxyä.thyl-I@T- y'-phenoxypropylanilin, dianotiertes o-Chlor- p-nitranilin und ein Sulfatierungsmittel mit einander dermassen zur Umsetzung gebracht werden,
dass die Oxyäthylgruppe in die ent sprechende Schwefelsäureestergruppe Über geführt wird und der Diazorest in bezug auf das tertiäre Stickstoffatom in 4-Stellung ein tritt.
Der neue Farbstoff bildet ein dunkles Pulver, welches in Wasser unter Bildung einer karmesinroten Lösung und in Schwefel säure unter Bildung einer braunen Lösung löslich ist. und Celluloseacetatkunstseide in roten Farbtönen färbt.
<I>Beispiel:</I> Eine feine Suspension von 17,3 Teilen o-Chlor-p-nitranilin in 300 Teilen Wasser und 30 Teilen 36 5@ iger Salzsäure wird durch Züi- gabe von 6,9 Teilen Natriumnitrit, gelöst in 50 Teilen Wasser, dianotiert.
Die auf 5 C gekühlte, Filtrierte Lösung der Diazoverbin- d.ung wird langsam in eine ähnlich gekühlte Lösung von 37,3 Teilen des Natriumsalzes des Schwefelsäureesters des N-,B-Oxyäthyl-N-y'- 1>henoxy liropylaniliris in 400 Teilen Wasser eingerührt.
Nachdem das Gemisch während 1 Stunde gerührt wurde, wird allmählich wässriges 50 J iges Natriumacetat hinzugefügt., um das mineralsaure Kupplungsmedium abzu stumpfen. Nach beendeter Kupplung wird die Suspension des Monoazofarbstoffes durch Zu gabe von 5n-Natriumhydroxydlösung auf Brillantgelb gerade alkalisch gestellt. Der Farbstoff wird abfiltriert, mit 21,j igem wässrigem Natriumchlorid gewaschen und bei 30-40 C getrocknet.
Der Schwefelsäureester des N-ss-Oxyäthyl- N-y'-phenoxypropylanilins wird durch Be handeln von N-ss-Oxyäthyl-N-y'-phenoxypro- pylanilin mittels Chlorsulfonsäure in Tetra- ehloräthan erhalten.
Process for the preparation of a new monoazo dye. The present invention relates to a process for the production of a new azo dye, according to which N-ss-Oxyä.thyl-I@T- y'-phenoxypropylaniline, dianotized o-chloro-p-nitroaniline and a sulfating agent are brought into reaction with one another will,
that the oxyethyl group is passed into the corresponding sulfuric acid ester group and the diazo radical occurs in the 4-position with respect to the tertiary nitrogen atom.
The new dye forms a dark powder which is soluble in water to form a crimson solution and in sulfuric acid to form a brown solution. and dyes cellulose acetate rayon in red shades.
<I> Example: </I> A fine suspension of 17.3 parts of o-chloro-p-nitraniline in 300 parts of water and 30 parts of 36% hydrochloric acid is dissolved in by adding 6.9 parts of sodium nitrite 50 parts of water, dianotized.
The filtered solution of the diazo compound, cooled to 5 ° C., is slowly transferred to a similarly cooled solution of 37.3 parts of the sodium salt of the sulfuric acid ester of N-, B-oxyethyl-N-y'-1> henoxy liropylaniliris in 400 parts Stir in water.
After the mixture has been stirred for 1 hour, aqueous 50% sodium acetate is gradually added in order to blunt the mineral acid coupling medium. After the coupling is complete, the suspension of the monoazo dye is made just alkaline by adding 5N sodium hydroxide solution to brilliant yellow. The dye is filtered off, washed with 21% aqueous sodium chloride and dried at 30.degree.-40.degree.
The sulfuric acid ester of N-ßs-oxyethyl-N-y'-phenoxypropylaniline is obtained by treating N-ß-oxyethyl-N-y'-phenoxypropylaniline with chlorosulfonic acid in tetrachloroethane.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB265405X | 1944-08-28 | ||
CH251389T | 1945-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH265405A true CH265405A (en) | 1949-11-30 |
Family
ID=25729531
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH265405D CH265405A (en) | 1944-08-28 | 1945-08-28 | Process for the preparation of a new monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH265405A (en) |
-
1945
- 1945-08-28 CH CH265405D patent/CH265405A/en unknown
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