共查询到20条相似文献,搜索用时 125 毫秒
1.
张蓉蓉 《化学工业与工程技术》2010,31(1):35-38
从物理、化学和生化3个方面综述了芳香族硝基化合物废水处理技术的现状,介绍了最新的废水处理技术——纳米技术,并展望了含芳香族硝基化合物废水处理技术的应用前景。 相似文献
2.
本文根据大量已测得的硝基化合物的晶体结构,并且从计算它们的分子密堆积系数K值出发,讨论了脂肪族、芳香族以及N杂环类硝基化合物的分子密堆积以及与此有关的密度和其结构稳定性,证实了分子内和分子间的氢键对于硝基化合物的分子紧密堆积有重大贡献,有利于提高它们的密度,从而改进了爆轰性能。从所讨论的一系列硝基化合物结构也可以看出分子堆积愈紧密也即密堆积系数K值愈大,则结构也愈稳定。硝基化合物的晶体结构测定,对于研究分子密堆积是很有意义的,一般分子堆积愈紧密,则化合物的密度愈高,而硝基化合物密度则是爆轰性能重要参数之一,所以测定硝基化合物的晶体结构和计算分子密堆积系数K值,将为脂肪族,芳香族以及氮杂环类硝基化合物的堆密积以及与此有关的密度和稳定性等性能的关系研究开辟了途径。 相似文献
3.
4.
芳香族硝基化合物的水合肼催化还原反应的研究 总被引:23,自引:1,他引:22
研究了以80%水合肼为还原剂,在FeCl3·6H2O/C存在下,回流3~8h,将芳香族硝基化合物转变成芳香族氨基化合物的还原反应。相应的氨基化合物的产率达到85%~98%。 相似文献
5.
6.
7.
8.
9.
10.
介绍胶束电动毛细管色谱分离非离子型的八种毒性很大的芳香族硝基化合物,探讨了这些化合物的迁移特性和电泳溶液pH值对分离的影响。 相似文献
11.
氯代芳香化合物生物降解的研究进展 总被引:1,自引:0,他引:1
综述了生物技术降解氯代芳香化合物的研究现状及其应用前景,分析了氯代芳香化合物的结构与其生物降解性的关系,降解机理包括氧化脱氯机理、还原脱氯机理及共代谢作用机理以及所需环境,并对氯代芳香化合物生物降解的研究方向提出笔者的观点。 相似文献
12.
The interaction is investigated between aromatic compounds (polynuclear hydrocarbons, aryl substituted ethenes, hydrocarbons with a mobile hydrogen atom, aromatic nitriles and ketones) and the binary potassium-graphite intercalation compound-KC24-in solvating solvents (tetrahydrofuran or dimethoxyethane). The amount of potassium extracted from the graphite intercalation compound as potassium compounds depends on the electron affinity of the aromatic molecule. The reduction products are anion-radicals, anions or dianions depending on the nature of the aromatic compounds. A tentative mechanism of the reduction of the aromatic molecules by KC24 is discussed. 相似文献
13.
14.
利用微波辐射技术,以柚皮素和芳酰肼为原料设计合成3种柚皮素芳酰腙类化合物,应用红外光谱、核磁共振谱、质谱和元素分析等分析手段对化合物进行了结构表征;用合成的柚皮素芳酰腙类化合物对大肠杆菌、金黄色葡萄球菌和枯草芽孢杆菌进行抑菌实验,显示出较好的抑菌活性。 相似文献
15.
16.
从反应原理、催化剂的选择、副反应的发生与控制等方面综述了芳香硝基化合物直接氟化的研究进展,阐述了硝基氟化的意义及应用重要性,介绍了硝基氟化的最新研究与发展方向。 相似文献
17.
A. M. Osman M. Z. A. Badr M. M. Aly H. A. H. El-Sherief 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1974,24(6):319-329
The introduction of the benzyl group into the aromatic nucleus is brought about by heating benzyl-α- and β-naphthyl ethers with the aromatic compounds, such as, naphthalene, 2-methylnaphthalene and isoquinoline. It has been concluded that the reaction depends initially on homolytic fission of the alkyl aryl ether into aryloxy and alkyl free radicals which are able to react with the aromatic nucleus. The homolytic mechanism of the alkylation studied and the isomer distribution in the alkylation products separated are discussed on bases of theories of free valency and atom localisation energy of aromatic compounds. 相似文献
18.
19.
Mohammad Hossein Keshavarz 《Propellants, Explosives, Pyrotechnics》2011,36(1):42-47
A new and reliable approach is introduced to predict enthalpy of fusion of non‐aromatic energetic compounds, which contain nitramine, nitrate and nitro functional groups. It is useful in diminishing hazardous synthesis and testing of energetic compounds. Simple relationship for predicting enthalpy of fusion can be expressed as a combination of the number of oxygen atoms and three structural parameters. Some experimental data of non‐aromatic energetic compounds were used to obtain the new correlation. The presented method has been tested with different non‐aromatic energetic compounds with complex molecular structures. The model can offer reliable predictions of enthalpy of fusion for non‐aromatic energetic compounds in comparison to the best available predictive methods. The enthalpy of fusion for some new non‐aromatic explosives such as CL‐20 and TNAZ was predicted. 相似文献
20.
A series of guaiacyl and syringyl lignin model compounds and their methylated analogues were reacted with alkaline hydrogen peroxide while irradiating with UV light at 254 nm. The aromatic products obtained were investigated by gas chromatography-mass spectrometry (GC-MS). Guaiacol, syringol and veratrol gave no detectable aromatic products. However, syringol methyl ether gave small amounts of aromatic products, resulting from ring substitution and methoxyl displacement by hydroxyl radicals. Reaction of vanillin and syringaldehyde gave the Dakin reaction products, methoxy-1,4-hydroquinones, while reaction of their methyl ethers yielded benzoic acids. Acetoguaiacone, acetosyringone and their methyl ethers afforded several hydroxylated aromatic products, but no aromatic products were identified in the reaction mixtures from guaiacylpropane and syringylpropane. In contrast, veratrylpropane gave a mixture from which 17 aromatic hydroxylated compounds were identified. It is concluded that for phenolic lignin model compounds, particularly those possessing electron-donating aromatic ring substituents, ring-cleavage reactions involving superoxide radical anions are dominant, whereas for non-phenolic lignin models, hydroxylation reactions through attack of hydroxyl radicals prevail. 相似文献