DE413380C - Process for the preparation of pure 1-nitro-2-methylanthraquinone - Google Patents

Process for the preparation of pure 1-nitro-2-methylanthraquinone

Info

Publication number
DE413380C
DE413380C DEF56568D DEF0056568D DE413380C DE 413380 C DE413380 C DE 413380C DE F56568 D DEF56568 D DE F56568D DE F0056568 D DEF0056568 D DE F0056568D DE 413380 C DE413380 C DE 413380C
Authority
DE
Germany
Prior art keywords
nitro
methylanthraquinone
pure
preparation
crude
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
DEF56568D
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.)
Sandoz AG
Original Assignee
Sandoz 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 Sandoz AG filed Critical Sandoz AG
Priority to DEF56568D priority Critical patent/DE413380C/en
Application granted granted Critical
Publication of DE413380C publication Critical patent/DE413380C/en
Expired legal-status Critical Current

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Description

Verfahren zur Herstellung von reinem 1-Nitro-2-methylanthrachinon. Durch das Hauptpatent 399741 ist ein Verfahren zur Herstellung von reinem i-Nitro-2-methylanthrachinon geschützt, das darin besteht, daß man das rohe Nitromethylanthrachinon in wäßriger Suspension längere. Zeit mit Natriumsulfit kocht. Es wurde nun gefunden, daß man ein noch reineres Produkt erhält, wenn man das rohe i-Nitro-2-methylanthrac'hinon mit einer wäßrigen Sulfitlösung unter Druck erhitzt.Process for the preparation of pure 1-nitro-2-methylanthraquinone. The main patent 399741 describes a process for the production of pure i-nitro-2-methylanthraquinone protected, which consists in the fact that the crude nitromethylanthraquinone in aqueous Suspension longer. Cooking time with sodium sulfite. It has now been found that one an even purer product is obtained if the crude i-nitro-2-methylanthrac'hinon is used heated with an aqueous sulfite solution under pressure.

Beispiel. i i i Teile 2vZethylanthrachinon werden, wie üblich,. nitriert; das feuchte Nitrierungsprodukt wird in eine wäßrige Lösung von 333 Teilen Natriumsulfit in etwa i8oo bis 2ooo Teilen Wasser eingetragen und im Druckgefäß 6 Stunden auf i io bis i i5#' erhitzt. Nach dem Erkalten wird der Rückstand abgesaugt und reichlich mit kochendem Wasser gewaschen.Example. i i i parts of 2vZethylanthraquinone are, as usual,. nitrided; the moist nitration product is dissolved in an aqueous solution of 333 parts of sodium sulfite added in about i8oo to 2ooo parts of water and placed in the pressure vessel for 6 hours i io to i i5 # 'heated. After cooling, the residue is suctioned off and plentiful washed with boiling water.

Claims (1)

PATEN T-ANSPRUCH: Abänderung des durch das Patent 399741 geschützten Verfahrens zur Herstellung von reinem i-Nitro-2-methylanthrachinon, dadurch gekennzeichnet, daß das rohe t-Nitro-2-methylanthrachinon mit einer wäßrigen Sulfitlösung unter Druck erhitzt wird.PATENT CLAIM: Modification of what is protected by patent 399741 Process for the production of pure i-nitro-2-methylanthraquinone, characterized in that that the crude t-nitro-2-methylanthraquinone with an aqueous sulfite solution under Pressure is heated.
DEF56568D 1924-07-27 1924-07-27 Process for the preparation of pure 1-nitro-2-methylanthraquinone Expired DE413380C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF56568D DE413380C (en) 1924-07-27 1924-07-27 Process for the preparation of pure 1-nitro-2-methylanthraquinone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF56568D DE413380C (en) 1924-07-27 1924-07-27 Process for the preparation of pure 1-nitro-2-methylanthraquinone

Publications (1)

Publication Number Publication Date
DE413380C true DE413380C (en) 1925-05-05

Family

ID=7108015

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF56568D Expired DE413380C (en) 1924-07-27 1924-07-27 Process for the preparation of pure 1-nitro-2-methylanthraquinone

Country Status (1)

Country Link
DE (1) DE413380C (en)

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