DE470502C - Process for the preparation of Kuepen dyes - Google Patents
Process for the preparation of Kuepen dyesInfo
- Publication number
- DE470502C DE470502C DEI29849D DEI0029849D DE470502C DE 470502 C DE470502 C DE 470502C DE I29849 D DEI29849 D DE I29849D DE I0029849 D DEI0029849 D DE I0029849D DE 470502 C DE470502 C DE 470502C
- Authority
- DE
- Germany
- Prior art keywords
- preparation
- parts
- dyes
- kuepen dyes
- kuepen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
- C09B3/40—Pyranthrones
- C09B3/44—Preparation from starting materials already containing the pyranthrone nucleus
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Optical Filters (AREA)
Description
Verfahren zur Darstellung von Küpenfarbstoffen Es wurde gefunden, daß man zu neuen wertvollen Küpenfarbstoffen der Pyranthronreihe gelangt, wenn man die Bz - BZ-Diarylpyranthrone, wie sie in der Patentschrift 278 424 beschrieben sind, mit oxydierend Benutzt man nicht oxydierend wirkende Kondensationsmittel, z. B. Aluminiumchlorid, so erhält man zunächst den gleichen Körper in einer Reduktionsstufe, die sich leicht zum Farbstoff selbst oxydieren läßt. Die neuen Farbstoffe unterscheiden sich von den Bz - Bz'-Diarylpyranthronen u. a. durch einen im allgemeinen nach Rot verschobenen Farbton.Process for the preparation of vat dyes It has been found that new valuable vat dyes of the pyranthrone series are obtained if the Bz - BZ-diarylpyranthrones, as described in patent specification 278 424, are oxidized If you use non-oxidizing condensation agents, z. B. aluminum chloride, the same body is first obtained in a reduction stage which can easily be oxidized to the dye itself. The new dyes differ from the Bz - Bz'-diarylpyranthrones, inter alia, in a hue that is generally shifted towards red.
Beispiel i Eine Lösung von io Teilen Bz-Bz'-Diphenylpyranthron in iooTeilen konzentrierter Schwefelsäure wird unter guter Kühlung mit einer Suspension von 6Teilen künstlichem oder kondensierend wirkenden Mitteln behandelt. Bei Verwendung oxydierend wirkender Mittel, z. B. Mangansuperoxyd, verläuft die Reaktion im einfachsten Falle wahrscheinlich nach folgender Gleichung: BraunsteÜi von etwa 55N MnO.-Gehalt in iooTeilen konzentrierter Schwefelsäure versetzt und so lange gerührt, bis die anfangs rotstichig blaue Farbe der Lösun 'g in ein reines Grün übergegangen ist. Man gießt in Wasser, arbeitet den in vorzüglicher Ausbeute entstandenen Farbstoff in der üblichen Weise auf und reinigt ihn, wenn nötig, durch Behandlung mit Natriumhypochloritlösung. Er bildet ein rotoranges Pulver, das sich in konzentrierter Schwefelsäure mit grüner Farbe löst. Aus der grün-en alkalischen Hydros-ulfitküpe erhält man lebhafte Orangefärbungen von guter Echtheit. Beispiel 2 4o Teile Altuniniumchlorid und io Teile Kochsalz werden bei 140' geschmolzen -und in das Gemisch ioTeile Bz-Bz'-Diphenylpyranthron eingetragen. Nach kurzer Zeit hat sich die Hydroverbindung des neuen Farbstoffes g gebildet. Teilweise schon bei der Aufarbeitung durch Berührung mit der Luft geht sie völlig beim Einleiten solcher in den Farbstoff selbst über, der in seinen chemischen und färberischen Eigenschaften mit dem des Beispiels i übereinstimmt.Example i A solution of 10 parts of Bz-Bz'-diphenylpyranthrone in 100 parts of concentrated sulfuric acid is treated with a suspension of 6 parts of artificial or condensing agents while being well cooled. When using oxidizing agents such. B. Manganese peroxide, the reaction in the simplest case probably proceeds according to the following equation: BraunsteÜi of 55N MnO. content is passed into a pure green offset in iooTeilen concentrated sulfuric acid and stirred until the initially reddish blue color of the Lösun 'g approximately. It is poured into water, the dye, which has been obtained in excellent yield, is worked up in the usual manner and, if necessary, purified by treatment with sodium hypochlorite solution. It forms a red-orange powder that dissolves in concentrated sulfuric acid with a green color. The green, alkaline hydrosulfite vat gives lively orange colorations of good fastness. Example 2 40 parts of aluminum chloride and 10 parts of common salt are melted at 140 'and 10 parts of Bz-Bz'-diphenylpyranthrone are added to the mixture. After a short time, the hydro compound of the new dye g has formed. In some cases even when working up through contact with the air, it is completely transferred when such is introduced into the dye itself, the chemical and dyeing properties of which correspond to those of Example i.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI29849D DE470502C (en) | 1926-12-24 | 1926-12-24 | Process for the preparation of Kuepen dyes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI29849D DE470502C (en) | 1926-12-24 | 1926-12-24 | Process for the preparation of Kuepen dyes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE470502C true DE470502C (en) | 1929-01-18 |
Family
ID=7187441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEI29849D Expired DE470502C (en) | 1926-12-24 | 1926-12-24 | Process for the preparation of Kuepen dyes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE470502C (en) |
-
1926
- 1926-12-24 DE DEI29849D patent/DE470502C/en not_active Expired
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