CH283979A - Process for the preparation of a derivative of 4,4'-diamino-stilbene-disulfonic acid- (2,2 '). - Google Patents
Process for the preparation of a derivative of 4,4'-diamino-stilbene-disulfonic acid- (2,2 ').Info
- Publication number
- CH283979A CH283979A CH283979DA CH283979A CH 283979 A CH283979 A CH 283979A CH 283979D A CH283979D A CH 283979DA CH 283979 A CH283979 A CH 283979A
- Authority
- CH
- Switzerland
- Prior art keywords
- stilbene
- disulfonic acid
- diamino
- preparation
- derivative
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Derivates der 4,4'-Diamino-stilben-disulfonsäure.(2,2'). Es wurde gefunden, dass man zu einem neuen Derivat der 4,4'-Diamino-stilben-disul- fonsäure-(2,2') gelangt, wenn man erfindungs gemäss 1 Mol des Dinatriumsalzes der 4,4'- Bis- [2-äthylamino-4-chlor-1,3,5-triazyl-(6)- amino]-stilben-disulforisäure-(2,2') mit 2 Mol o-Chlor-anilin umsetzt.
Die Umsetzung kann zum Beispiel in der Weise erfolgen, dass man eine wässerige Lö sung von 1 11o1 des genannten Dinatriumsal- zes bei 40 bis 90 C mit 2 Mol o-Chlor-anilin umsetzt.
Das so erhaltene Nat.riumsalz der Formel
EMI0001.0019
ist in Wasser löslich. Es kann zum optischen Bleiehen von Baumwolle verwendet werden. <I>Beispiel:</I> Zu einer Lösung von 72,7 Teilen des Di- natriumsalzes der 4,4'-Bis- [2-äthylamino-4- ehlor-1, 3, 5-triazyl- (6) -amino ] -stilben-disulfon- säure-(2,2')
(hergestellt durch Kondensation von 2 Mol Cyanurchlorid mit 1 Mol 4,4'-Di- amino-stilben-disulfonsäure-(2,2') und 2 Mol Monoäthylamin) in 700 Teilen Wasser wer den bei 35 bis 40 C unter Rühren 51 Teile o-Chlor-anilin zugefügt. Anschliessend steigert man die Temperatur des Reaktionsgemisches innerhalb 2 Stunden auf 80 C und rührt während 8 Stunden bei 80 bis 90 C.
Hierauf fügt man Natriumcarbonatlösung bis zur deut lich alkalischen Reaktion zu, lässt das Reak- tionsgemisch auf 15 bis 20 C abkühlen und setzt Natriumchlorid zu. Das abgeschiedene Dinatriümsalz der 4,4'-Bis-[2-äthylamÜno-4-o- chlor - anilino -1,3,5-triazyl- (6) -amino] -stilben- disulfonsäure-(2,2') wird abfiltriert, mit Na triumchloridlösung gewaschen und getrocknet.
Man erhält das neue Produkt als hellgelbes, wasserlösliches Pulver.
Baumwolle, die mit einer wässerigen Lö sung des Pulvers behandelt wurde, erscheint weisser als Baumwolle, die ohne Zusatz dieses Produktes behandelt wurde.
Process for the preparation of a derivative of 4,4'-diamino-stilbene-disulfonic acid. (2,2 '). It has been found that a new derivative of 4,4'-diamino-stilbene-disulphonic acid- (2,2 ') is obtained if, according to the invention, 1 mole of the disodium salt of 4,4'-bis [2 -ethylamino-4-chloro-1,3,5-triazyl- (6) -amino] -stilbene-disulforic acid- (2,2 ') with 2 moles of o-chloro-aniline.
The reaction can be carried out, for example, in such a way that an aqueous solution of 11101 of the disodium salt mentioned is reacted at 40 to 90 ° C. with 2 mol of o-chloro-aniline.
The sodium salt of the formula obtained in this way
EMI0001.0019
is soluble in water. It can be used to optically lead cotton. <I> Example: </I> To a solution of 72.7 parts of the disodium salt of 4,4'-bis [2-ethylamino-4-chloro-1, 3, 5-triazyl- (6) - amino] -stilbene-disulfonic acid- (2,2 ')
(Prepared by condensation of 2 moles of cyanuric chloride with 1 mole of 4,4'-di-amino-stilbene-disulfonic acid (2.2 ') and 2 moles of monoethylamine) in 700 parts of water who at 35 to 40 C with stirring 51 parts o-chloro-aniline added. The temperature of the reaction mixture is then increased to 80 ° C. over the course of 2 hours and the mixture is stirred at 80 to 90 ° C. for 8 hours.
Sodium carbonate solution is then added until the reaction is clearly alkaline, the reaction mixture is allowed to cool to 15 to 20 C and sodium chloride is added. The deposited disodium salt of 4,4'-bis [2-äthylamÜno-4-o-chloro-anilino -1,3,5-triazyl- (6) -amino] -stilbene-disulfonic acid- (2,2 ') is filtered off, washed with sodium chloride solution and dried.
The new product is obtained as a pale yellow, water-soluble powder.
Cotton that has been treated with an aqueous solution of the powder appears whiter than cotton that has been treated without the addition of this product.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH281107T | 1949-10-18 | ||
CH283979T | 1949-10-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH283979A true CH283979A (en) | 1952-06-30 |
Family
ID=25732054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH283979D CH283979A (en) | 1949-10-18 | 1949-10-18 | Process for the preparation of a derivative of 4,4'-diamino-stilbene-disulfonic acid- (2,2 '). |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH283979A (en) |
-
1949
- 1949-10-18 CH CH283979D patent/CH283979A/en unknown
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