CH227514A - Process for the preparation of an azo dye mixture. - Google Patents
Process for the preparation of an azo dye mixture.Info
- Publication number
- CH227514A CH227514A CH227514DA CH227514A CH 227514 A CH227514 A CH 227514A CH 227514D A CH227514D A CH 227514DA CH 227514 A CH227514 A CH 227514A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- nitro
- methyl
- acid
- dye mixture
- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Rerstellung eines Azofarbstoffgemisehes. Es wurde gefunden, dass man zu einem neuen Azofarbstoffgemisch gelangen kann, wenn man auf 1 Mol 3-Methyl-l-diogäthyl- amino-benzol 1 Mol 4-Nitro-2-chlordiazoben- zol und mehr als 1, aber weniger als 2 Mol Sulfochloressigsäure derart zur Einwirkung bringt,
dass das 4-Nitro-2-chlordiazobenzol in 4-Stellung des 3-Methyl-l-diogäthylamino- benzols eintritt und die Chlorsulfonessigsäure Ogäthylgruppen unter Bildung eines sauren Esters verestert.
Das neue Azofarbstoffgemisch bildet ein dunkles Pulver, das sich in Wasser löst und Acetatkunstseide aus, dem neutralen Glauber- salzbade in rubinroten Tönen färbt.
Beispiel: 195 Teile 3-Methyl-l-diogäthylaminoben- zol werden in 1000 Vol.-Teilen Toluol ge löst, mit 260 Teilen Sulfochloressigsäure ver setzt und das Gemisch hierauf unter Rühren eine Stunde lang zum Sieden erhitzt. Das mit dem Toluol wegsiedende Veresterungswasser wird dabei getrennt aufgefangen, während das überschüssige Toluol wieder in den Reak tionskolben zurückfliesst.
Nach beendigter Umsetzung wird das Gemisch mit 4000 Tei len Wasser versetzt, wobei vollständige Lö sung eintritt. Diese wird vom Toluol ge trennt und in Gegenwart von Eis in üblicher Weise mit der Diazolösung von 172,5 Teilen 4-Nitro-2-chloraminobenzol gekuppelt und die Mineralsäure mit Natriumacetat abge stumpft. Der Farbstoff wird abgenutscht, in Wasser nochmals aufgeschlämmt, mit Ammo niak genau neutral gestellt, erneut ab- genutscht und im Vakuum getrocknet.
Zum gleichen Farbstoff gelangt man, wenn man den Azofarbstoff aus 195 Teilen 3-Methyl-l-diogäthylaminobenzol und der Diazoverbindung aus 172,5 Teilen 4-Nitro-2- chloraminobenzol herstellt und hierauf das so erhaltene Produkt in Toluol mit 260 Tei len Sulfochloressigsäure in der angegebenen Weise verestert.
Process for the preparation of an azo dye mixture. It has been found that a new mixture of azo dyes can be obtained if 1 mole of 4-nitro-2-chlorodiazobenzene and more than 1 but less than 2 moles are added to 1 mole of 3-methyl-1-diogethylamino-benzene Brings sulfochloroacetic acid into action in such a way that
that the 4-nitro-2-chlorodiazobenzene occurs in the 4-position of 3-methyl-1-diogäthylamino- benzene and the chlorosulfonacetic acid esterifies Ogäthylgruppen to form an acidic ester.
The new azo dye mixture forms a dark powder that dissolves in water and forms acetate artificial silk, which colors the neutral Glauber salt bath in ruby red tones.
Example: 195 parts of 3-methyl-1-diogäthylaminoben- zol are dissolved in 1000 parts by volume of toluene, ver with 260 parts of sulfochloroacetic acid and the mixture is then heated to the boil for one hour while stirring. The water of esterification boiling away with the toluene is collected separately, while the excess toluene flows back into the reaction flask.
When the reaction has ended, 4000 parts of water are added to the mixture, complete dissolution occurring. This is separated from the toluene and coupled in the usual manner in the presence of ice with the diazo solution of 172.5 parts of 4-nitro-2-chloraminobenzene and the mineral acid is blunted with sodium acetate. The dye is filtered off with suction, suspended again in water, made exactly neutral with ammonia, suction filtered again and dried in vacuo.
The same dye is obtained if the azo dye is prepared from 195 parts of 3-methyl-l-diogäthylaminobenzene and the diazo compound from 172.5 parts of 4-nitro-2-chloraminobenzene and then the product thus obtained in toluene with 260 parts of sulfochloroacetic acid esterified in the manner indicated.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH225362T | 1941-05-29 | ||
CH227514T | 1941-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH227514A true CH227514A (en) | 1943-06-15 |
Family
ID=25726864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH227514D CH227514A (en) | 1941-05-29 | 1941-05-29 | Process for the preparation of an azo dye mixture. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH227514A (en) |
-
1941
- 1941-05-29 CH CH227514D patent/CH227514A/en unknown
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