GB1439980A - Process for the manufacture of pure 1-nitroanthraquinone - Google Patents

Process for the manufacture of pure 1-nitroanthraquinone

Info

Publication number
GB1439980A
GB1439980A GB4993673A GB4993673A GB1439980A GB 1439980 A GB1439980 A GB 1439980A GB 4993673 A GB4993673 A GB 4993673A GB 4993673 A GB4993673 A GB 4993673A GB 1439980 A GB1439980 A GB 1439980A
Authority
GB
United Kingdom
Prior art keywords
nitric acid
nitroanthraquinone
molar ratio
pure
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
GB4993673A
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of GB1439980A publication Critical patent/GB1439980A/en
Expired legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1439980 Preparation of pure 1-nitroanthraquinone BAYER AG 26 Oct 1973 [28 Oct 1972] 49936/73 Heading C2C Pure 1-nitroanthraquinone is prepared by nitrating anthraquinone in nitric acid at a concentration of at least 87% at from -20‹ to + 80‹ C. using a molar ratio of nitric acid/ anthraquinone of at least 4 : 1, thereafter in a first step precipitating dinitroanthraquinones either by adjusting the conditions to between an acid concentration of 87 to 99% at a mole ratio of nitric acid/nitration product of no less than 4 : 1 or by decreasing solely the acid concentration to 99 to 87% or by decreasing solely the molar ratio of nitric acid/nitration products to no less than 4 : 1, and in a second step separating off 1-nitroanthraquinone from the filtrate by setting up conditions ranging from an acid concentration of 76% and a molar ratio of nitric acid/nitration products of 19 : 1 to an acid concentration of 96% and a molar ratio of nitric acid/nitration products of 4 : 1.
GB4993673A 1972-10-28 1973-10-26 Process for the manufacture of pure 1-nitroanthraquinone Expired GB1439980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722253016 DE2253016C3 (en) 1972-10-28 1972-10-28 Process for the production of pure 1-nitro-anthraquinone

Publications (1)

Publication Number Publication Date
GB1439980A true GB1439980A (en) 1976-06-16

Family

ID=5860330

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4993673A Expired GB1439980A (en) 1972-10-28 1973-10-26 Process for the manufacture of pure 1-nitroanthraquinone

Country Status (5)

Country Link
BE (1) BE806554A (en)
CH (1) CH597143A5 (en)
DE (1) DE2253016C3 (en)
FR (1) FR2204611B1 (en)
GB (1) GB1439980A (en)

Also Published As

Publication number Publication date
FR2204611A1 (en) 1974-05-24
FR2204611B1 (en) 1977-05-27
DE2253016B2 (en) 1980-06-26
DE2253016C3 (en) 1981-02-26
CH597143A5 (en) 1978-03-31
DE2253016A1 (en) 1974-05-09
BE806554A (en) 1974-04-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee