CAS: 129-39-5; 1,8-Dinitroanthraquinone

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82-34-8 81-65-2 81-55-0

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CAS号82-35-9 1,5-二硝基蒽醌 | CAS号84-65-1 蒽醌 | CAS号57875-61-3 dinitro-anthraq... | CAS号612-35-1 2-苄基苯甲酸 | CAS号82-34-8 1-硝基蒽醌 | CAS号59471-77-1 1-amino-8-nitro... | CAS号7664-93-9 硫酸 | CAS号7697-37-2 硝酸 | CAS号81-64-1 1,4-二羟基蒽醌 | CAS号82-35-9 1,5-二硝基蒽醌 | CAS号129-40-8 9,10-Anthracene... | CAS号117-10-2 1,8-二羟基蒽醌 | CAS号129-42-0 1,8-二氨基蒽醌 | CAS号128-94-9 1,8-二氨基-4,5-二羟基... | CAS号139312-39-3 anthracene-1,8-... | CAS号82-17-7 1,8-diphenoxyan... | CAS号82-48-4 1,8-Anthracened... | CAS号59471-77-1 1-amino-8-nitro...

蒽醌置于硝酸体系中,化学反应生成1,8-二硝基蒽醌
参考文献:Preparation Of Pure 1,5-Dinitroanthraquinone
标题:Preparation Of Pure 1,5-Dinitroanthraquinone
摘要:将至少35%为1,5-二硝基蒽醌的二硝基蒽醌混合物,在卤代芳烃,羧酸腈或环状砜中以升高的温度溶解,然后选择性地冷却以沉淀几乎纯净的1,5-二硝基蒽醌.首选溶剂为1-氯萘,砜烷和己二腈.溶解的温度范围从约120摄氏度到沸点,冷却温度约为10到200摄氏度,冷却至不低于0摄氏度.

专利信息

专利号:US-3983145-A
优先权日:1973-11-01
标 题:Use of alpha-di(lower alkoxy) anthraquinones in the synthesis of Alizarin Saphirols
发明人：WHITE DAVID L; FITZPATRICK JOSEPH W
权利人:TOMS RIVER CHEMICAL CORP
摘要:Alpha-dihydroxyanthraquinones used as intermediates in the synthesis of many dyestuffs, such as the Alizarin Saphirols (e.g. Color Constitution No. 63000, 63005, 63010, 63011, 63315 and 63610) can be replaced on an equimolar basis by alpha-di(lower alkoxy)anthraquinones. The alpha-di(lower alkoxy) anthraquinones can be converted in a single step, by treatment with oleum, to the corresponding alpha-dihydroxyanthraquinone-beta-disulfonic acids in almost quantitative yield. The corresponding diamine is obtained by dinitrating followed by reduction of the nitro groups. The known intermediate, leuco 1,4,5,8-tetrahydroxyanthraquinone (see C.I. No. 62500) can be obtained either by reduction of the diamine or by reduction of the dinitro compound. In one embodiment, the alpha-di(lower alkoxy)anthraquinone is obtained from dinitroanthraquinone by treatment thereof with methanol and KOH.

专利号:US-4255342-A
优先权日:1979-04-02
标 题:Synthesis of phenoxyanthraquinones
发明人：OLIN ARTHUR D
权利人:TOMS RIVER CHEMICAL CORP
摘要:A method of synthesizing phenoxyanthraquinones in the absence of excess phenol, water-miscible alcohols or polar aprotic solvents. Phenoxyanthraquinones are synthesized in high yield and purity by treatment of the corresponding chloro- or nitroanthraquinone with an equivalent of alkali metal phenoxide, particularly potassium phenoxide in a liquid aromatic solvent which is a chloro-substituted benzene, a lower alkyl-substituted benzene, or a loweralkyl-chloro-substituted benzene. The use of the inventive solvents results in high yields of readily isolable, substantially pure product. The used solvent is readily recoverable without the pollution potential of excess phenol or difficultly recoverable water-miscible solvents.

专利号:US-4154747-A
优先权日:1977-07-07
标 题:Production of virtually pure 1-amino-8-nitro-4,5-dihydroxyanthraquinone
发明人：ELSER WOLFGANG; EPPLE GERHARD; HIMMELE WALTER
权利人:BASF AG
摘要:A process for the preparation of 1-amino-8-nitro-4,5-dihydroxyanthraquinone by partially reducing the corresponding dinitrohydroxyanthraquinone and isolating the reduction product, in which crude 1,8-dinitro-4,5-dihydroxyanthraquinone obtained by nitrating 4,5-dihydroxyanthraquinone is partially reduced in a phenol-water mixture, which contains from 5 to 50% by weight of water, in the presence of an alkali metal phenolate, by means of a reductone, reductonate or a mixture of these. The product is virtually free from by-products and is suitable for use for the synthesis of dyes.

专利号:CN-115318342-A
优先权日:2022-09-13
标 题 :Heterogeneous bimetallic platinum catalyst and application thereof in synthesis of gamma-chloropropyltrichlorosilane

专利号:US-4543214-A
优先权日:1983-06-23
标 题 :Process for the preparation of bromoanthraquinones
发明人：SOMLO TIBOR; REGLI JOHANN
权利人:CIBA GEIGY AG
摘要:A process for the preparation of pure bromoanthraquinones by denitrobrominating corresponding nitroanthraquinones is described. The process comprises treating nitroanthraquinones of the formula I ##STR1## wherein X is hydroxy, mercapto, carboxy or halogen and m is 1, 2, 3 or 4 and n is 1 or 2, in the temperature range from 200° to 350° C. n Bromoanthraquinones of more than 95% purity are valuable starting materials for dye synthesis and can be used directly without further purification.

专利号:EP-0148126-A2
优先权日:1983-12-23
标题:Process for the isolation of pure 1-nitroanthraquinone from nitro-anthraquinone mixtures
发明人：SOMLO TIBOR DR
权利人:CIBA GEIGY AG
摘要:A process for the isolation of pure 1-nitroanthraquinone from nitroanthraquinone mixtures is described. The crude 1-nitroanthraquinone is then suspended in a polar aprotic solvent, the water content of which is at most 20% by weight, and the suspension is treated with an alkali metal hydroxide with thorough mixing at a temperature of from -10 ° C. to + 60 ° C. The by-products go into solution and the pure 1-nitroanthraquinone is filtered off. 1-nitroanthraquinone is an important intermediate for dye synthesis and is used, for example, to manufacture vat dyes.