CH228828A - Process for the preparation of a dye of the stilbene series. - Google Patents
Process for the preparation of a dye of the stilbene series.Info
- Publication number
- CH228828A CH228828A CH228828DA CH228828A CH 228828 A CH228828 A CH 228828A CH 228828D A CH228828D A CH 228828DA CH 228828 A CH228828 A CH 228828A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- dye
- brown
- stilbene
- parts
- 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. 217235. Verfähren zur Herstellung eines Farbstoffes der Stilbenreihe. Fis wurde ,gefunden, d ass (ein neuer Farb,- stoff der .Stilbenreihe hergestellt werden kann, wenn. man den Farbstoff, der durch vorsichtige Reduktion von 4,4'-Dimitrostilben- 2,2'-,
dis ulfo#nsöure unter Verknüpfung zweier Moleküle erhaditen wird, mit 1 Mol des Farb stoffes der Formel
EMI0001.0022
l;
o@nden@smemt. Der getrocknete Farbstoff stellt ein braunes Pulver dar, das sich in konzentrierter Schwefelsäure mit blauer, in Wasser mit braunoranger Farbe löst und Baumwolle bei Gegenwart von Kupfersalzen in echten, rot braunen Tönen färbt.
Der dem Verfahren als Ausgangsstoiff -dienende Stübenfarbstoff ist als ein Gemisch der Produkte der Formeln.
EMI0001.0041
0:,N- < :i>-CH= <SEP> <B>CH- < C>-N</B>= <SEP> N-O-CH=CH-O-N02
<tb> I <SEP> I <SEP> I
<tb> <B>503H <SEP> S0311 <SEP> 503H</B> <SEP> S0311
<tb> und
<tb> 0aN-O-CH= <SEP> CH-O-N- <SEP> N- -CH= <SEP> <B>CH-- < C>-NO,</B>
<tb> I <SEP> <B>\O,/</B>
<tb> @I
<tb> <B>S0311 <SEP> S0311 <SEP> S0311 <SEP> 503H</B>
<tb> aufzufassen.
Die Kon:demation kann beispielsweise durch Erhitzen der Komponenten in alka- lisehem, vorzugsweise ätzalkalischem 31e- dium, offen oder unter Druck, durchgeführt werden.
<I>Beispiel:</I> 18 Teile des Farbstoffes, der erhalten wird, wenn man 45 Teile 4,4'-:dinitrostiIben.- 2,2'-disulfo:nsaures Natrium mit 7 Teilen Traubenzucker und 60 Teilen 30%iger Na- tronlauge, in etwa 400 Teilen Wasser ge löst, bei 70 bis 80 reduziert und den Farb stoff in bekannter Weisse durch Neutra-lsie- ren und Zugabe von Natiiumchlorid abschei det und 6,
5 Teile des Natriumza.lzes der 4-Oxy - 2'- metbyl-4'-amido-5'-methoxya.zo:ben- zol-3-ca.rbonsäure werden in 300 Teilen Was ser und 2 7 Teilen. 30 % ige,r Natriumhydr.oxyd- l,ösung gelöst und 12 Stunden rückfliessend behoeht. Hierauf wird: mit 90 Teilen Na t.riumchlorid versetzt und der ausgefallene Farbstoff nach dem Erkalten a.bfiltriert.
<B> Additional patent </B> to main patent no. 217235. Process for the production of a dye of the stilbene series. It was found that a new dye of the stilbene series can be produced if the dye, which is obtained by careful reduction of 4,4'-dimitrostilbene-2,2'-,
disulfonic acid is obtained by linking two molecules with 1 mol of the dye of the formula
EMI0001.0022
l;
o @ nden @ smemt. The dried dye is a brown powder that dissolves in concentrated sulfuric acid with a blue color, in water with a brownish-orange color and, in the presence of copper salts, dyes cotton in real, red-brown tones.
The stub dye used as starting material for the process is available as a mixture of the products of the formulas.
EMI0001.0041
0:, N- <: i> -CH = <SEP> <B> CH- <C> -N </B> = <SEP> N-O-CH = CH-O-N02
<tb> I <SEP> I <SEP> I
<tb> <B> 503H <SEP> S0311 <SEP> 503H </B> <SEP> S0311
<tb> and
<tb> 0aN-O-CH = <SEP> CH-O-N- <SEP> N- -CH = <SEP> <B> CH-- <C> -NO, </B>
<tb> I <SEP> <B> \ O, / </B>
<tb> @I
<tb> <B> S0311 <SEP> S0311 <SEP> S0311 <SEP> 503H </B>
<tb> to be understood.
The condensation can be carried out, for example, by heating the components in alkaline, preferably caustic alkaline, medium, openly or under pressure.
<I> Example: </I> 18 parts of the dye obtained by adding 45 parts of 4,4 '-: dinitrostiIben.- 2,2'-disulfo: sodium acid with 7 parts of grape sugar and 60 parts of 30% Sodium hydroxide solution, dissolved in about 400 parts of water, reduced at 70 to 80 and the color is separated off in the known white by neutralizing and adding sodium chloride and 6,
5 parts of the sodium count of 4-oxy-2'-metbyl-4'-amido-5'-methoxya.zo: benzene-3-ca.rboxylic acid in 300 parts of water and 2 7 parts. 30% sodium hydroxide solution dissolved and refluxed for 12 hours. Then: 90 parts of sodium chloride are added and the dyestuff which has precipitated out is filtered off after cooling.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH228828T | 1940-07-06 | ||
CH217235T | 1941-10-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH228828A true CH228828A (en) | 1943-09-15 |
Family
ID=25725975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH228828D CH228828A (en) | 1940-07-06 | 1940-07-06 | Process for the preparation of a dye of the stilbene series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH228828A (en) |
-
1940
- 1940-07-06 CH CH228828D patent/CH228828A/en unknown
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