CH190626A - Process for the preparation of a dye. - Google Patents
Process for the preparation of a dye.Info
- Publication number
- CH190626A CH190626A CH190626DA CH190626A CH 190626 A CH190626 A CH 190626A CH 190626D A CH190626D A CH 190626DA CH 190626 A CH190626 A CH 190626A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- dye
- preparation
- heating
- water
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Farbstoffes. Gegenstand dieses Zusatzpatentes ist ein Verfahren zur Darstellung eines Farbstoffes, welches dadurch gekennzeichnet ist, dass man 4-Amino-sulfo-1.8-naphthalsäure, die durch Erhitzen von 4-Aminonaphthalsäure oder deren Anhydrid mit einem Gemisch von Schwefel säuremonohydrat und 20 o/oigem Oleum bei <B>50-600</B> C, Eingiessen in Wasser, Absaugen und Neutralwaschen erhältlich ist, mit der Verbindung folgender Formel
EMI0001.0008
in Gegenwart von Natriumbisulfitlauge kon densiert.
<I>Beispiel:</I> 60 Gewichtsteile Aminosulfonaphthalsäure, die durch Erhitzen von 4-Aminonaphthalsäure oder deren Anhydrid mit einem Gemisch von Schwefelsäuremonohydrat und 20 o/oigem Ole- um bei 50-60 o C, Eingiessen in Wasser, Ab saugen und Neutralwaschen erhältlich ist, und 75 Gewichtsteile einer Verbindung von der Formel
EMI0001.0018
werden in einer Mischung von 800 Gewichts teilen Natriumbisulfitlauge 400 B6 und 200 Teilen Wasser während mehreren Stunden so lange siedend erhitzt,
bis sich keine un veränderte Amino-sulfonaphthalsäure mehr nachweisen lässt. Nach dem Erkalten ist die ganze Masse zu einem Kristallbrei erstarrt, es wird abgesaugt und durch Auswaschen mit Natriumehloridlösung von Natriumbisulfit befreit. Nach dem Umlösen aus Wasser wird ein gelbes Pulver erhalten. Der Farbstoff färbt Wolle aus saurem Bade in klaren gelben Tönen an. Die nachchromierten Färbungen sind ebenfalls gelb und besitzen sehr gute Echtheitseigenschaften.
Process for the preparation of a dye. The subject of this additional patent is a process for the preparation of a dye, which is characterized in that 4-amino-sulfo-1,8-naphthalic acid, which is obtained by heating 4-aminonaphthalic acid or its anhydride with a mixture of sulfuric acid monohydrate and 20% oleum at <B> 50-600 </B> C, pouring into water, suction and neutral washing is available with the compound of the following formula
EMI0001.0008
condenses in the presence of sodium bisulfite liquor.
<I> Example: </I> 60 parts by weight of aminosulfonaphthalic acid, obtained by heating 4-aminonaphthalic acid or its anhydride with a mixture of sulfuric acid monohydrate and 20% oleum at 50-60 ° C., pouring it into water, suctioning off and Neutral wash is available, and 75 parts by weight of a compound of the formula
EMI0001.0018
are boiled in a mixture of 800 parts by weight of sodium bisulfite lye 400 B6 and 200 parts of water for several hours until
until no more unchanged amino sulfonaphthalic acid can be detected. After cooling, the whole mass has solidified into a crystal paste, it is sucked off and freed from sodium bisulfite by washing out with sodium chloride solution. After dissolving from water, a yellow powder is obtained. The dye stains wool from an acid bath in clear yellow tones. The chromium-plated dyeings are also yellow and have very good fastness properties.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE190626X | 1934-07-14 | ||
CH186559T | 1935-07-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH190626A true CH190626A (en) | 1937-04-30 |
Family
ID=25721393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH190626D CH190626A (en) | 1934-07-14 | 1935-07-12 | Process for the preparation of a dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH190626A (en) |
-
1935
- 1935-07-12 CH CH190626D patent/CH190626A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH190626A (en) | Process for the preparation of a dye. | |
DE205324C (en) | ||
CH190627A (en) | Process for the preparation of a dye. | |
CH97360A (en) | Process for the preparation of a condensation product of the anthraquinone series which can be used as dye and dye intermediate. | |
CH186559A (en) | Process for the preparation of a dye. | |
CH131509A (en) | Process for the preparation of a condensation product presumably consisting of 1.B-oxyäthylamino-5.B-oxyäthylaminoanthraquinone. | |
CH190624A (en) | Process for the preparation of a dye. | |
CH148487A (en) | Method for the quantitative separation of 2,3-dihalo- and 2,5-dihalogen-4-amino-1-methylbenzene. | |
CH263847A (en) | Process for the production of a vat dye. | |
CH136557A (en) | Process for the preparation of a water-soluble isatin-a-derivative. | |
CH210527A (en) | Process for the production of an anthraquinone derivative. | |
CH211051A (en) | Process for the preparation of a chromable triarylmethane dye. | |
CH122760A (en) | Process for the production of a new indigoid dye. | |
CH153717A (en) | Process for the preparation of a vat dye. | |
CH141769A (en) | Process for the preparation of an alkaline cotton dye of the stilbene series. | |
CH188528A (en) | Process for the production of a vat dye. | |
CH123270A (en) | Process for the production of a new indigoid dye. | |
CH206729A (en) | Method for the preparation of 5 ': 5 "- dibenzoylamino-1: 1': 5: 1" - trianthrimide carbazole. | |
CH168919A (en) | Process for the preparation of an anthraquinone derivative. | |
CH122759A (en) | Process for the production of a new indigoid dye. | |
CH151156A (en) | Process for the preparation of a vat dye of the anthraquinone series. | |
CH216321A (en) | Process for the production of an acidic wool dye. | |
CH168920A (en) | Process for the preparation of an anthraquinone derivative. | |
CH126194A (en) | Process for the preparation of a benzobenzanthronecarboxylic acid. | |
CH224358A (en) | Process for the production of an acidic wool dye. |