CH99285A - Process for the preparation of a dye. - Google Patents
Process for the preparation of a dye.Info
- Publication number
- CH99285A CH99285A CH99285DA CH99285A CH 99285 A CH99285 A CH 99285A CH 99285D A CH99285D A CH 99285DA CH 99285 A CH99285 A CH 99285A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- yellow
- vat
- naphthoquinone
- 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
- C09B17/00—Azine dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Farbstoffes. Es wurde gefunden, dass eine als Pigment wie als Küpenfarbstoff von hervorragenden Echtheitseigenschaften benutzbare Verbindung erhalten wird, wenn man das Eurhodol, das beispielsweise aus 2-Oxy-1.4-naphtochinon und o-Phenylendiamin erhältlich ist, mit 2.3-Dichlor-1 #4-naphtochinon bei Gegenwart von Salzsäure bindenden Mitteln erhitzt.
Beispiel: 25 Teile des Eurhodols, das zum Beispiel aus 2-Oxy-1 # 4-naphtochinon und 1 # 2-Di- aminobenzol erhalten werden kann (Kehr mann, Ber. d. d. chem. Ges.
1890, Seite 2453) werden mit 23 Teilen 2 # 3-Dichlor-1 # 4-naphto- chinon, 22 Teilen wasserfreiem Natriumacetat und 80 Teilen Nitrobenzol unter Rühren auf 140 erhitzt. Nach kurzer Zeit entsteht eine gelbbraune Lösung, deren Farbe allmählich neingelb wird. Nach einer Stunde wird heiss filtriert; beim Erkalten kristallisiert der völlig reine Farbstoff aus, der Rest wird durch Ab- blasen des Nitrobenzols gewonnen. Er löst sich in konzentrierter Schwefelsäure rot und färbt Baumwolle aus der Hydrosulfitküpe in neingelben Tönen von vorzüglicher Echtheit.
Process for the preparation of a dye. It has been found that a compound which can be used as a pigment and as a vat dye with excellent fastness properties is obtained if the Eurhodol, which is obtainable, for example, from 2-oxy-1,4-naphthoquinone and o-phenylenediamine, is mixed with 2,3-dichloro-1 # 4- naphthoquinone heated in the presence of hydrochloric acid binding agents.
Example: 25 parts of Eurhodol, which can be obtained, for example, from 2-oxy-1 # 4-naphthoquinone and 1 # 2-diaminobenzene (Kehrmann, Ber. D. D. Chem. Ges.
1890, page 2453) are heated to 140 with 23 parts of 2 # 3-dichloro-1 # 4-naphtoquinone, 22 parts of anhydrous sodium acetate and 80 parts of nitrobenzene with stirring. After a short time, a yellow-brown solution forms, the color of which gradually turns yellow. After one hour, the mixture is filtered hot; When it cools, the completely pure dye crystallizes out, the rest is obtained by blowing off the nitrobenzene. It dissolves red in concentrated sulfuric acid and dyes cotton from the hydrosulfite vat in five-yellow shades of excellent authenticity.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH99285T | 1921-12-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH99285A true CH99285A (en) | 1923-05-16 |
Family
ID=4357191
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH99285D CH99285A (en) | 1921-12-13 | 1921-12-13 | Process for the preparation of a dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH99285A (en) |
-
1921
- 1921-12-13 CH CH99285D patent/CH99285A/en unknown
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