DE485908C - Process for the preparation of anthraquinone derivatives - Google Patents

Process for the preparation of anthraquinone derivatives

Info

Publication number
DE485908C
DE485908C DEF58667D DEF0058667D DE485908C DE 485908 C DE485908 C DE 485908C DE F58667 D DEF58667 D DE F58667D DE F0058667 D DEF0058667 D DE F0058667D DE 485908 C DE485908 C DE 485908C
Authority
DE
Germany
Prior art keywords
parts
weight
preparation
anthraquinone derivatives
series
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
DEF58667D
Other languages
German (de)
Inventor
Dr R E Schmidt
Dr Robert Berliner
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 DEF58667D priority Critical patent/DE485908C/en
Application granted granted Critical
Publication of DE485908C publication Critical patent/DE485908C/en
Expired legal-status Critical Current

Links

Description

Verfahren zur Darstellung von Anthrachinonderivaten Die Oxydation der nach den Patenten 455822 und 459_164 erhaltenen Produkte wird nach Patent 467 496 in Schwefelsäure mit Oxydationsmitteln, wie Braunstein oder Bleisuperoxyd, oder allein durch Erhitzen mit konzentrierter Schwefelsäure ausgeführt.Process for the preparation of anthraquinone derivatives Oxidation of the products obtained according to patents 455822 and 459_164 is according to patent 467 496 in sulfuric acid with oxidizing agents such as manganese dioxide or lead peroxide, or carried out solely by heating with concentrated sulfuric acid.

Es wurde nun gefunden, daß die Körper der Reihe I und II, wie sie gemäß den Patenten .155 822 und 459 364 erhalten werden, sich zu den gleichen Produkten, wie sie nach Patent 467 496 entstehen, sehr glatt und bequem auch in wäßriger Suspension oxydieren lassen, wenn man mit geeigneten Oxydationsmitteln, wie salpetriger Säure oder Salpetersäure, arbeitet.It has now been found that the bodies of series I and II, like them obtained according to patents .155 822 and 459 364, referring to the same products, as they arise according to patent 467 496, very smooth and convenient even in aqueous suspension let oxidize, if one uses suitable oxidizing agents, such as nitrous acid or nitric acid, works.

Das bedeutet eine erhebliche Vereinfachung der Arbeitsweise, da man zum Beispiel die Schmelze der Körper der Reihte 1I (Patent 455 822 Beispiel i ) direkt in Wasser geben und ohne zu isolieren, direkt oxydieren-kann. Beispiel i 24 Gewichtsteile I # 4-Aminooxyanthrachinon werden, wie in Patent 455 822 Beispiel 2 beschrieben, in 685 Gewichtsteilen 7oprozentiger Schwefelsäure mit 7 Gewichtsteilen Paraformaldehyd kondensiert. Die Schmelze, die den Körper der Reihe II enthält, wird nach beendigter Reaktion in 5ooo Teile Wassereingerührt und zum Sieden erhitzt. Zu der kochenden Suspension werden allmählich 40 bis 5o Gewichtsteile 77prozentige Salpetersäure zugegeben, bis eine abfiltrierte Probe sich in konzentrierter Schwefelsäure violettrot löst, ivas nach ganz kurzer Zeit der Fall ist.That means a considerable simplification of the way of working, since one for example the melt of the bodies of the series 1I (patent 455 822 example i) put directly into water and can oxidize directly without isolating. Example i Twenty-four parts by weight of I # 4-aminooxyanthraquinone are used as in Patent 455,822 Example 2, in 685 parts by weight of 7 percent strength sulfuric acid with 7 parts by weight Paraformaldehyde condensed. The melt containing the body of series II, After the reaction is complete, it is stirred into 5,000 parts of water and heated to the boil. Gradually 40 to 50 parts by weight of 77 percent are added to the boiling suspension Nitric acid is added until a filtered sample is dissolved in concentrated sulfuric acid violet-red dissolves, ivas is the case after a very short time.

Beispiel 2 Die wie oben hergestellte Schmelze wird in 5ooo Teile Wasser, dem io Gewichtsteile 1Vatriumnitrit zugesetzt sind, gegossen und aufgekocht. Die Oxydation ist fast momentan beendet.Example 2 The melt prepared as above is dissolved in 5,000 parts of water, to which 10 parts by weight of sodium nitrite are added, poured and boiled. the Oxidation has almost ended for the moment.

Beispiel 3 2o Gewichtsteile des Körpers der Reihe 1I (Patent 455 822 Beispiel i) werden in 5oo Teilen konzentrierter Schwefelsäure auf 8o bis 85° erwärmt (Patent 459 364 Beispiel i). Die olivbraune Schmelze wird in 5ooo Teile Wasser gegossen. .Die Suspension besteht jetzt aus dem Körper der Reihe i (Patent 455 822 Beispiel 2). Die Suspension wird zum Sieden erhitzt und ihr 15 bis 2o Gewichtsteile 77prozentige Salpetersäure zugesetzt, bis eine abfiltrierte Probe in konzentrierter Schwefelsäure sich mit violettroter Farbe löst. Man kann in diesem Beispiel natürlich auch direkt die Schmelze von Patent 455 822 Beispiel 2 verwenden, die den mit nur 4 Gewichtsteilen Paraformaldehyd hergestellten Körper der Reihe I enthält.Example 3 20 parts by weight of the body of series 1I (patent 455 822 example i) are heated in 500 parts of concentrated sulfuric acid to 80 to 85 ° (patent 459 364 example i). The olive-brown melt is poured into 500 parts of water. The suspension now consists of the body of series i (patent 455 822 example 2). The suspension is heated to boiling and added to their 5 to 1 parts by weight 2o 77prozentige nitric acid, until a filtered sample in concentrated sulfuric acid dissolves with violet-red color. In this example, it is of course also possible to use the melt from Patent 455 822 Example 2 directly, which contains the body of series I produced with only 4 parts by weight of paraformaldehyde.

Claims (1)

PATENTANSPRUCH: Ausführungsform des durch das Hauptpatent 467 496 geschützten Verfahrens, darin bestehend, daß man hier die Oxydation in wäßriger Suspension mit geeigneten Oxydationsmitteln, wie salpetriger Säure, Salpetersäure u. dgl., ausführt.PATENT CLAIM: Embodiment of the main patent 467 496 Protected process, consisting in the fact that here the oxidation in aqueous Suspension with suitable oxidizing agents such as nitrous acid, nitric acid and the like.
DEF58667D 1925-04-22 1925-04-22 Process for the preparation of anthraquinone derivatives Expired DE485908C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF58667D DE485908C (en) 1925-04-22 1925-04-22 Process for the preparation of anthraquinone derivatives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF58667D DE485908C (en) 1925-04-22 1925-04-22 Process for the preparation of anthraquinone derivatives

Publications (1)

Publication Number Publication Date
DE485908C true DE485908C (en) 1929-11-06

Family

ID=7108606

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF58667D Expired DE485908C (en) 1925-04-22 1925-04-22 Process for the preparation of anthraquinone derivatives

Country Status (1)

Country Link
DE (1) DE485908C (en)

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