CH102278A - Process for the production of a new wool dye. - Google Patents
Process for the production of a new wool dye.Info
- Publication number
- CH102278A CH102278A CH102278DA CH102278A CH 102278 A CH102278 A CH 102278A CH 102278D A CH102278D A CH 102278DA CH 102278 A CH102278 A CH 102278A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- production
- new wool
- new
- wool dye
- 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
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/14—Monoazo compounds
- C09B45/16—Monoazo compounds containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen Wollfarbstoffes. Es wurde :gefunden, @dass man zu einem neuenWollfarbstoff gelangenkann, wennma.n den chromhaltigen Farbstoff, der aus dem A.zofarbstoff .aus 1 . 2-Dia.zooxyd-4-naphtalin- sulfosäure und a-Naphtol durch Behandeln mit Alkalichromiten erhalten werden kann, mit salpetriger Säure behandelt.
Der neue Wollfarbstoff bildet .ein s.chwärz- liches, .bronzierendes Pulver und färbt Wolle aus schwefelsaurem Bade schwarz.
<I>Beispiel:</I> Die Chromverbindung"die durch Kuppeln von 27,2 Teilen 1 . 2 :di;azooxyd-4-naphtalin- sulfosaurem Natrium und 14.4 Teilen a- Naphtol und Behandeln des so erhaltenen Farbstoffes mit Alka.l:ichromiten erhalten wird, wird' in 700 Teilen Wasser von<B>50'</B> ge löst.
Hierauf fügt man,der klaren Lösung<B>6,9</B> Teile Nitrit zu, kühlt und versetzt langsam mit 270 Teilen 10 %-iger Schwefelsäure, bis die Masse icleutlich mineralsauer geworden ist. Es wird noch längere Zeit gerührt, zuerst unter Kühlung, dann bei :gewöhnlicher Tem peratur, hernach die überschüssige Mineral säure mit Soda abgestumpft, der Farbstoff mit 200 Teilen Kochsalz vollständig ausge fällt, filtriert und getrocknet.
Process for the production of a new wool dye. It has been found that a new wool dye can be obtained if the chromium-containing dye is derived from the A.zo dye from 1. 2-Dia.zooxyd-4-naphthalene sulfonic acid and a-naphtol can be obtained by treating with alkali chromites, treated with nitrous acid.
The new wool dye forms a blackish, bronzing powder and dyes wool black from a sulfuric acid bath.
<I> Example: </I> The chromium compound "obtained by coupling 27.2 parts of 1. 2: di; azooxide-4-naphthalene sulfonic acid sodium and 14.4 parts of a-naphthol and treating the dye thus obtained with Alka.l : ichromiten is obtained is 'dissolved in 700 parts of <B> 50' </B> water.
Then add 6.9 parts of nitrite to the clear solution, cool and slowly add 270 parts of 10% sulfuric acid until the mass has clearly become minerally acidic. The mixture is stirred for a long time, first with cooling, then at: the usual temperature, then the excess mineral acid is blunted with soda, the dye is completely precipitated with 200 parts of sodium chloride, filtered and dried.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH102278T | 1922-10-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH102278A true CH102278A (en) | 1923-11-16 |
Family
ID=4360830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH102278D CH102278A (en) | 1922-10-03 | 1922-10-03 | Process for the production of a new wool dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH102278A (en) |
-
1922
- 1922-10-03 CH CH102278D patent/CH102278A/en unknown
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