CH227295A - 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
- CH227295A CH227295A CH227295DA CH227295A CH 227295 A CH227295 A CH 227295A CH 227295D A CH227295D A CH 227295DA CH 227295 A CH227295 A CH 227295A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- stilbene
- preparation
- mole
- 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
Description
Zusatzpatent zum Hauptpatent Nr. 217235. Verfahren zur Herstellung eines Farbstoffes der Stilbenr eihe. Es wurde gefunden, dass ein neuer Farb stoff der Stilbenreihe hergestellt werden kann, wenn man den Farbstoff, der durch vorsich tige Reduktion von 4,4'-Dinitrostilben-2,2'- disulfonsäure unter Verknüpfung zweier Mole küle erhalten wird, mit 1 Mol des Farbstoffes der Formel:
EMI0001.0007
kondensiert.
Der neue Farbstoff stellt in trockenem Zustande ein dunkles Pulver dar, das sich in konzentrierter Schwefelsäure mit blauer, in _N,#'asser mit oranger Farbe löst und Baum wolle aus glaubersalzhaltigem Bade in orangen Tönen färbt, die beim Behandeln mit Kupfer salzen noch etwas röter und sehr gut wasch echt werden.
Der dem Verfahren als Ausgangsstoff dienende Stilbenfarbstoff ist als ein Gemisch der Produkte der Formeln
EMI0002.0001
aufzufassen. Die Kondensation kann beispielsweise durch Erhitzen der Komponenten in alkali schem, vorzugsweise ätzalkalischem Medium, offen oder unter Druck, durchgeführt werden.
<I>Beispiel:</I> 6 Teile des Farbstoffes, der erhalten wird, wenn man 45 Teile 4,4'-dinitrostilben-2,2'- disulfonsaures Natrium mit 7 Teilen Trauben zucker und 60 Teilen 30 /oiger Natronlauge, in etwa 400 Teilen Wasser gelöst, bei 70 bis<B>80'</B> reduziert und den Farbstoff in be kannter Weise durch Neutralisieren und Zu gabe von Natriumehlorid abscheidet, und 5,6 Teile des Natriumsalzes des Farbstoffes aus diazotierter 4-Amino-4'-oxy-1,1'-azobenzol- 3'-carbonsäure und 1-(3'-Amino-5'-carboxy-4'- oxyphenyl)
-3-methyl-.5-pyrazolon (sodaalkali- scheKupplung) werden in 100 Teilen heissem Wasser gelöst und nach Zugabe von 16 Tei len 30 %oiger Natronlauge 20 Stunden unter Rückflusskühlung"'gekocht. Man lässt erkalten filtriert den ausgeschiedenen Farbstoff ab und löst ihn aus verdünnter Natronlauge um.
Additional patent to the main patent No. 217235. Process for the production of a dye of the stilbene series. It has been found that a new dye of the stilbene series can be produced if the dye, which is obtained by careful reduction of 4,4'-dinitrostilbene-2,2'-disulfonic acid by linking two molecules, has 1 mol of the dye of the formula:
EMI0001.0007
condensed.
When dry, the new dye is a dark powder that dissolves in concentrated sulfuric acid with a blue color, in _N, # 'water with an orange color, and colors cotton from a bath containing Glauber's salt in orange tones, which are a little redder when treated with copper salts and very well wash real.
The stilbene dye used as starting material for the process is available as a mixture of the products of the formulas
EMI0002.0001
understand. The condensation can be carried out, for example, by heating the components in an alkaline, preferably caustic, medium, openly or under pressure.
<I> Example: </I> 6 parts of the dye which is obtained when 45 parts of 4,4'-dinitrostilbene-2,2'-disulfonic acid sodium are mixed with 7 parts of grape sugar and 60 parts of 30% sodium hydroxide solution in about 400 parts of water dissolved, reduced at 70 to <B> 80 '</B> and the dye in a known manner by neutralizing and adding sodium chloride, and 5.6 parts of the sodium salt of the dye from diazotized 4-amino 4'-oxy-1,1'-azobenzene-3'-carboxylic acid and 1- (3'-amino-5'-carboxy-4'-oxyphenyl)
-3-methyl-.5-pyrazolone (soda-alkaline coupling) are dissolved in 100 parts of hot water and, after addition of 16 parts of 30% sodium hydroxide solution, refluxed for 20 hours. The dye which has separated out is allowed to cool, filtered off and dissolved convert it from dilute caustic soda.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH227295T | 1940-07-06 | ||
CH217235T | 1941-10-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH227295A true CH227295A (en) | 1943-05-31 |
Family
ID=25725971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH227295D CH227295A (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) | CH227295A (en) |
-
1940
- 1940-07-06 CH CH227295D patent/CH227295A/en unknown
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