DE430542C - Process for the production of a Kuepen dye of the anthraquinone series - Google Patents

Process for the production of a Kuepen dye of the anthraquinone series

Info

Publication number
DE430542C
DE430542C DEG60347D DEG0060347D DE430542C DE 430542 C DE430542 C DE 430542C DE G60347 D DEG60347 D DE G60347D DE G0060347 D DEG0060347 D DE G0060347D DE 430542 C DE430542 C DE 430542C
Authority
DE
Germany
Prior art keywords
dye
production
kuepen
anthraquinone series
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
DEG60347D
Other languages
German (de)
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.)
Chemische Ind Ges
GESELLSCHAFT fur CHEMISCHE INDUSTRIE
BASF Schweiz AG
Original Assignee
Chemische Ind Ges
GESELLSCHAFT fur CHEMISCHE INDUSTRIE
Gesellschaft fuer Chemische Industrie in Basel CIBA
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 Chemische Ind Ges, GESELLSCHAFT fur CHEMISCHE INDUSTRIE, Gesellschaft fuer Chemische Industrie in Basel CIBA filed Critical Chemische Ind Ges
Application granted granted Critical
Publication of DE430542C publication Critical patent/DE430542C/en
Expired legal-status Critical Current

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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
    • C09B5/00—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings

Landscapes

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

Description

Verfahren zur Herstellung eines Küpenfarbstoffes der Anthrachinonreihe. In dem Patent 423311 ist ein Verfahren zur Herstellung eines Küpenfarbstoffes beschrieben worden, dadurch gekennzeichnet, daß man die 2-Aminoantliracliinon- 3-karbonsäure mit Ätzalkalien; gegebenenfalls in Gegenwart eines Flußmittels, verschmilzt und daß man das so erhaltene Produkt einer Reinigung unterwirft.Process for the production of a vat dye of the anthraquinone series. In the patent 423311 a process for the preparation of a vat dye is described been, characterized in that the 2-Aminoantliracliinon-3-carboxylic acid with caustic alkalis; optionally in the presence of a flux, fused and that the product thus obtained is subjected to purification.

Es wurde nun gefunden, daß man zum gleichen Farbstoff gelangt, wenn man die 2-Aniinoanthrachinon-3-karbonsäure bzw. ihre Salze statt mit Ätzalkalien in der Wärme mit oxvdierend wirkenden Mitteln behandelt und wenn man das so erhaltene Produkt in bekannter Weise reinigt.It has now been found that the same dye can be obtained if the 2-aniinoanthraquinone-3-carboxylic acid or its salts instead of caustic alkalis treated in the heat with oxidizing agents and when you get what is Cleans the product in a known manner.

Beispiel. 25 Teile 2-Aminoanthrachinon-3-karbonsäure hzw. 27 Teile ihres Natronsalzes werden bei gewöhnlicher Temperatur unter Rühren in 375 Teile konzentrierte Schwefelsäure eingetragen und dann auf etwa 9o° erwärmt. Nachdem Lösung eingetreten ist, trägt man im Verlauf von etwa r Stunde in kleinen Portionen unter Rühren 35 Teile fein gemahlenen Braunstein ein und behält die Reaktionstemperatur von 9o bis roo° während mehrerer Stunden bei. Die Reaktionsflüssigkeit wird in Wasser gegossen, der in Form blauschwarzer Flocken abgeschiedene Farbstoff abgesaugt, mit Wasser säurefrei gewaschen und dann zuerst mit Natriumbisulfit und darauffolgend wiederholt mit Sodalösung ausgekocht, mit heißem Wasser gewaschen und getrocknet.Example. 25 parts of 2-aminoanthraquinone-3-carboxylic acid hzw. 27 parts Their sodium salt are divided into 375 parts at ordinary temperature with stirring concentrated sulfuric acid entered and then heated to about 9o °. After solution has occurred, it is added in small portions in the course of about an hour Stir in 35 parts of finely ground manganese dioxide and keep the reaction temperature from 9o to roo ° for several hours. The reaction liquid becomes in water poured, sucked off the dye deposited in the form of blue-black flakes, with Washed acid-free water and then first with sodium bisulfite and then repeatedly boiled with soda solution, washed with hot water and dried.

Das so erhaltene Rohprodukt wird mit verdünnter Salpetersäure zum Sieden erhitzt und eine Viertelstunde im Sieden erhalten. Es erfolgt Farbenumschlag von blauschwarz über gelbgrün nach rotbraun. Die erkaltete Reaktionsflüssigkeit wird abgesaugt und der Rückstand säurefrei gewaschen. Das erhaltene, gelbgrün gefärbte Produkt wird durch Aufkochen mit Alkalien, Absaugen und gründliches Waschen mit Wasser von löslichen Nebenprodukten befreit. Hierbei erfolgt gleichzeitig Rückbildung des blauschwarz gefärbten Farbstoffes. Das erhaltene Produkt wird hierauf getrocknet.The crude product obtained in this way is used with dilute nitric acid Heated to the boil and kept boiling for a quarter of an hour. There is a change in color from blue-black to yellow-green to red-brown. The cooled reaction liquid is filtered off with suction and the residue is washed free of acid. The yellow-green color obtained Product is made by boiling with alkalis, suction and thorough washing with Water freed from soluble by-products. At the same time, regression takes place of the blue-black colored dye. The product obtained is then dried.

Claims (1)

PATENT-ANSPRUCII: Abänderung des durch Patent d.23311 geschützten Verfahrens zur Herstellung eines Küpenfarbstoffes der Anthrachinonreihe, dadurch gekennzeichnet, daß man hier die 2-Aminoantbrachinon-3-Icarbonsäure bzw. ihre Salze statt mit Ätzalkalien in der Wärme, mit oxydierend wirkenden Mitteln behandelt.PATENT APPLICATION: Modification of what is protected by patent d.23311 Process for the preparation of a vat dye of the anthraquinone series, thereby characterized in that the 2-Aminoantbrachinon-3-Icarboxylic acid or its salts are used here treated with oxidizing agents instead of caustic alkalis in the heat.
DEG60347D 1923-03-08 1923-12-21 Process for the production of a Kuepen dye of the anthraquinone series Expired DE430542C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH430542X 1923-03-08

Publications (1)

Publication Number Publication Date
DE430542C true DE430542C (en) 1926-06-17

Family

ID=4514939

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG60347D Expired DE430542C (en) 1923-03-08 1923-12-21 Process for the production of a Kuepen dye of the anthraquinone series

Country Status (1)

Country Link
DE (1) DE430542C (en)

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