DE517443C - Process for the preparation of Kuepen dyes - Google Patents

Process for the preparation of Kuepen dyes

Info

Publication number
DE517443C
DE517443C DEI37706D DEI0037706D DE517443C DE 517443 C DE517443 C DE 517443C DE I37706 D DEI37706 D DE I37706D DE I0037706 D DEI0037706 D DE I0037706D DE 517443 C DE517443 C DE 517443C
Authority
DE
Germany
Prior art keywords
preparation
methylanthraquinone
sulfur
kuepen dyes
dyes
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
DEI37706D
Other languages
German (de)
Inventor
Dr Filip Kacer
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 DEI37706D priority Critical patent/DE517443C/en
Application granted granted Critical
Publication of DE517443C publication Critical patent/DE517443C/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
    • C09B49/00—Sulfur dyes
    • C09B49/12—Sulfur dyes from other compounds, e.g. other heterocyclic compounds
    • C09B49/124—Sulfur dyes from other compounds, e.g. other heterocyclic compounds from polycarbocyclic compounds

Description

Verfahren zur Darstellung von Küpenfarbstoffen Es wurde gefunden, daB man beim Erhitzen von 3-Merkapto-.2-methylantrachinon und seinen Derivaten mit Schwefel neue, hervorragend. echte Küpenfarbstoffe erhält. Man hat bereits 3-Chlor-2-methylanthrachinon mit Schwefel verschmolzen, wobei das Chlor zunächst durch Schwefel ersetzt wird und im weiteren Verlauf der Reaktion Farbstoffbildung eintritt. Der Farbstoff wird hierbei in sehr unreiner Form erhalten, weshalb er noch durch Behandeln mit Natriumhypochlorit gereinigt werden muß. Demgegenüber gelingt es gemäß der Erfindung, unmittelbar einen reinen Farbstoff zu erhalten, der deshalb einer weiteren Reinigung mit Natriumhypochlorit nicht bedarf.Process for the preparation of vat dyes It was found that when 3-mercapto-.2-methylanthraquinone and its derivatives are heated, Sulfur new, excellent. receives real vat dyes. You already have 3-chloro-2-methylanthraquinone fused with sulfur, the chlorine being replaced by sulfur first and dye formation occurs in the further course of the reaction. The dye will obtained here in a very impure form, which is why it is still treated with sodium hypochlorite needs to be cleaned. In contrast, it succeeds according to the invention, directly one To obtain pure dye, which is why a further cleaning with sodium hypochlorite not required.

Beispiel r Teil 3-Merkapto-2-methylanthrachinon (erhältlich z. B. aus 3-Chlor-2-methylanthrachinon durch Behandeln mit Schwefelnatrium) wird mit q. Teilen Schwefel gemischt und 3 bis q. Stunden lang bei etwa 25o° verschmolzen. Die fertige Schmelze wird zur Entfernung des überschüssigen Schwefels mit Schwefelnatriumlösung ausgekocht. Man erhält dabei als Rückstand den reinen Farbstoff in Form eines bräunlichgelben, kristallinischen Pulvers. Er löst sich in konzentrierter Schwefelsäure trüb blauviolett, in rauchender Schwefelsäure von 23 °/o S03-Gehalt gelbgrün. Die Farbe der Hydrosulfitküpe ist grünlich olivgelb. Die Färbung auf Baumwolle ist ein klares Gelb.Example r Part 3-Mercapto-2-methylanthraquinone (available e.g. from 3-chloro-2-methylanthraquinone by treatment with sodium sulphide) is obtained with q. Share sulfur mixed and 3 to q. Fused for hours at about 25o °. the finished melt is used to remove the excess sulfur with sodium sulphide solution boiled out. The pure dye is obtained as a residue in the form of a brownish-yellow, crystalline powder. It dissolves in concentrated sulfuric acid in a cloudy blue-violet color, yellow-green in fuming sulfuric acid with 23% SO3 content. The color of the hydrosulfite vat is greenish olive yellow. The coloring on cotton is a clear yellow.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von Küpenfarbstoffen, dadurch gekennzeichnet, daB man 3-Merkapto-2-methylanthrachinon oder seine Derivate mit Schwefel erhitzt.PATENT CLAIM: Process for the representation of vat dyes, thereby characterized that one can use 3-mercapto-2-methylanthraquinone or its derivatives Sulfur heated.
DEI37706D 1929-04-12 1929-04-12 Process for the preparation of Kuepen dyes Expired DE517443C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI37706D DE517443C (en) 1929-04-12 1929-04-12 Process for the preparation of Kuepen dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI37706D DE517443C (en) 1929-04-12 1929-04-12 Process for the preparation of Kuepen dyes

Publications (1)

Publication Number Publication Date
DE517443C true DE517443C (en) 1931-02-04

Family

ID=7189589

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI37706D Expired DE517443C (en) 1929-04-12 1929-04-12 Process for the preparation of Kuepen dyes

Country Status (1)

Country Link
DE (1) DE517443C (en)

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