DE436538C - Process for the preparation of Kuepen dyes - Google Patents

Process for the preparation of Kuepen dyes

Info

Publication number
DE436538C
DE436538C DEF54582D DEF0054582D DE436538C DE 436538 C DE436538 C DE 436538C DE F54582 D DEF54582 D DE F54582D DE F0054582 D DEF0054582 D DE F0054582D DE 436538 C DE436538 C DE 436538C
Authority
DE
Germany
Prior art keywords
preparation
dyes
kuepen dyes
kuepen
blue
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
DEF54582D
Other languages
German (de)
Inventor
Dr Josef Stock
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 DEF54582D priority Critical patent/DE436538C/en
Application granted granted Critical
Publication of DE436538C publication Critical patent/DE436538C/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
    • C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
    • C09B3/22—Dibenzanthrones; Isodibenzanthrones
    • C09B3/30—Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus

Landscapes

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

Description

Verfahren zur Darstellung von Küpenfarbstoffen. Zusatz zum Patent 435477. In dem Hauptpatent 435477 wurde gezeigt, daB Nitrodibenzanthronyle durch Kalischmelze in wertvolle Küpenfarbstoffe übergehen.Process for the preparation of vat dyes. Addition to the patent 435477. In the main patent 435477 it was shown that nitrodibenzanthronyls by Potash melts into valuable vat dyes.

Es wurde weiter gefunden, daß man ganz ähnliche Farbstoffe erhält, wenn man an Stelle der Nitrodibenzanthronyle Nitrodibenzanthrone der Kalischmelze unterwirft.It was also found that very similar dyes are obtained, if instead of the nitrodibenzanthronyls nitrodibenzanthrones from the potash melt subject.

Beispiele. i. 15 Teile Mononitrodibenzanthron (Indanthrenschwarz 2B) werden bei 16o° in ein Gemisch von i 5o Teilen Ätzkali und 7 5 Teilen Alkohol eingetragen, die Schmelze kurze Zeit bei i8o° verrührt und dann weiter auf 225 bis 23o° erhitzt. Nach etwa :1/2 Stunde wird abgekühlt, in Wasser gelöst, zur Oxydation von Leukoverbindung Luft eingeblasen, filtriert und gewaschen. Man erhält eine blauschwarz gefärbte Paste des Farbstoffes, der aus violetter alkalischer Hydrosulfitküpe Baumwolle in graublauen bis schwarzen Tönen von sehr guter Echtheit anfärbt.Examples. i. 15 parts mononitrodibenzanthrone (indanthrene black 2B) are entered at 16o ° in a mixture of 15o parts of caustic potash and 75 parts of alcohol, the melt stirred for a short time at 180 ° and then further heated to 225 to 23o °. After about: 1/2 hour it is cooled, dissolved in water to oxidize the leuco compound Air blown in, filtered and washed. A blue-black colored one is obtained Paste of the dye obtained from violet alkaline hydrosulfite vat cotton in dyes gray-blue to black shades of very good fastness.

2. Ein ähnliches Produkt wird gewonnen, wenn Dinitrodibenzanthron - erhalten durch Nitrierung von Dibenzanthron mit konzentrierter Salpetersäure in Nitrobenzol; blaugrünes Pulver, löslich in konzentrierter Schwefelsäure mit braunvioletter Farbe, Stickstoffgehalt 5,i6 Prozent - in gleicher Weise, wie in Beispiel i angegeben, mit Alkali verschmolzen und aufgearbeitet wird.2. A similar product is obtained when dinitrodibenzanthrone - obtained by nitrating dibenzanthrone with concentrated nitric acid in Nitrobenzene; blue-green powder, soluble in concentrated sulfuric acid with brown-violet Color, nitrogen content 5, i6 percent - in the same way as stated in example i, is fused with alkali and worked up.

Claims (1)

PATENTANSPRUCH Abänderung des Verfahrens zur Darstellung von Küpenfarbstoffen nach dem Hauptpatent 435477 dadurch gekennzeichnet, daB an Stelle von Nitrodibenzanthronylen hier Nitrodibenzanthrone mit alkalischen Kondensationsmitteln behandelt werden.PATENT CLAIM Modification of the process for the preparation of vat dyes according to the main patent 435477 characterized in that instead of nitrodibenzanthronylene here nitrodibenzanthrones are treated with alkaline condensation agents.
DEF54582D 1923-08-22 1923-08-22 Process for the preparation of Kuepen dyes Expired DE436538C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF54582D DE436538C (en) 1923-08-22 1923-08-22 Process for the preparation of Kuepen dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF54582D DE436538C (en) 1923-08-22 1923-08-22 Process for the preparation of Kuepen dyes

Publications (1)

Publication Number Publication Date
DE436538C true DE436538C (en) 1926-11-03

Family

ID=7107184

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF54582D Expired DE436538C (en) 1923-08-22 1923-08-22 Process for the preparation of Kuepen dyes

Country Status (1)

Country Link
DE (1) DE436538C (en)

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