DE524503C - Process for the preparation of particles of naphthazarin - Google Patents

Process for the preparation of particles of naphthazarin

Info

Publication number
DE524503C
DE524503C DEI39925D DEI0039925D DE524503C DE 524503 C DE524503 C DE 524503C DE I39925 D DEI39925 D DE I39925D DE I0039925 D DEI0039925 D DE I0039925D DE 524503 C DE524503 C DE 524503C
Authority
DE
Germany
Prior art keywords
naphthazarin
preparation
particles
intermediates
sulfuric acid
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
Application number
DEI39925D
Other languages
German (de)
Inventor
Dr Georg Kraenzlein
Dr Paul Ochwat
Dr Robert Welde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI39925D priority Critical patent/DE524503C/en
Application granted granted Critical
Publication of DE524503C publication Critical patent/DE524503C/en
Expired legal-status Critical Current

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
    • C09B13/00—Oxyketone dyes
    • C09B13/02—Oxyketone dyes of the naphthalene series, e.g. naphthazarin

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Darstellung von Abkömmlingen des Naphthazarins In dern Hauptpatent 507 347 ist beschrieben, daß man durch Umsetzung der wäßrigen, blauen Lösungen der Naphthazarinzwischenprodukte, die nach den Verfahren der Patentschriften 76 922, 79 4o6, 114 264, io8 551 oder 134 705 erhalten werden, wertvolle, als Pigmentfarbstoffe verwendbare Kondensationsprodukte erhält.Process for the preparation of derivatives of naphthazarin In the main patent 507 347 it is described that by reacting the aqueous, blue solutions of the naphthazarin intermediates, which are obtained by the processes of patents 76 922, 79 406, 114 264, IO8 551 or 134 705 , valuable condensation products that can be used as pigment dyes are obtained.

Es wurde nun gefunden, daß man zu den gleichen oder ähnlichen Kondensationsprodukten gelangt, wenn man die nach den Verfahren der genannten Patentschriften in Schwefelsäurelösung erzeugten Naphthazarinzwischenprodukte direkt in der Schwefelsäurelösung mit Aldehyden kondensiert und die so erhaltene Lösung der Kondensationsprodukte in Schwefelsäure gegebenenfalls nach der Filtration in Wasser gießt. Hierbei scheiden sich die gewünschten Kondensationsprodukte aus.It has now been found that the same or similar condensation products can be obtained when the process of the patents mentioned is in sulfuric acid solution generated naphthazarin intermediates directly in the sulfuric acid solution with aldehydes condensed and the resulting solution of the condensation products in sulfuric acid optionally poured into water after filtration. Here the desired ones are different Condensation products.

Beispiel ioo kg einer Naphthazarinschmelze, 8 kg umgesetztes Dinitronaphthalin enthaltend, werden über eine Steinnutsche filtriert, mit festem Paraformaldehyd verrührt, bis die rotbraune Lösung tief kornblumenblau geworden ist. Dann wird in Wasser gegeben, aufgekocht, abfiltriert und ausgewaschen. Man erhält ein schwarzes Pigment, welches sich in konzentrierter Schwefelsäure rotbraun löst.Example 100 kg of a naphthazarin melt containing 8 kg of converted dinitronaphthalene are filtered through a stone suction filter and mixed with solid paraformaldehyde until the red-brown solution has turned a deep cornflower blue. It is then poured into water, boiled, filtered off and washed out. A black pigment is obtained which dissolves red-brown in concentrated sulfuric acid.

Claims (1)

PATENTANSPRUCH: Weitere Ausbildung des Verfahrens zur DarstellungvonAbkömmlingendesNaphthazarins gemäß Hauptpatent 507 347, dadurch gekennzeichnet, daß man hier die beispielsweise nach den im Hauptpatent genannten Patentschriften erhältlichen unverdünnten Lösungen der Naphthazarinzwischenprodukte in Schwefelsäure mit aliphatischen Aldehyden umsetzt und die Kondensationsprodukte, gegebenenfalls nach vorheriger Filtration, durch Eingießen in Wasser abscheidet. PATENT CLAIM: Further development of the process for the preparation of derivatives of naphthazarin according to main patent 507 347, characterized in that the undiluted solutions of naphthazarine intermediates in sulfuric acid with aliphatic aldehydes, optionally after previous filtration, are reacted here, if necessary after previous filtration, by pouring in the undiluted solutions of naphthazarin intermediates Separates water.
DEI39925D 1929-11-24 1929-11-24 Process for the preparation of particles of naphthazarin Expired DE524503C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI39925D DE524503C (en) 1929-11-24 1929-11-24 Process for the preparation of particles of naphthazarin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI39925D DE524503C (en) 1929-11-24 1929-11-24 Process for the preparation of particles of naphthazarin

Publications (1)

Publication Number Publication Date
DE524503C true DE524503C (en) 1931-05-09

Family

ID=7190179

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI39925D Expired DE524503C (en) 1929-11-24 1929-11-24 Process for the preparation of particles of naphthazarin

Country Status (1)

Country Link
DE (1) DE524503C (en)

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