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活性氧化铝载体的孔结构 总被引:13,自引:0,他引:13
本文阐述了载体活性氧化铝孔的产生及类型,提出了孔结构的网络模型,讨论了影响氧化铝孔结构的几种因素,介绍了几种控制孔结构的方法,并综合考虑了氧化铝孔结构与其它物性间的关系而提出了一些看法。 相似文献
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列举了某公司尼龙生产线己二酸装置氧化反应器搅拌在多年运行中常见的损坏形式.分析了原因,提高了对氧化反应器搅拌的重视程度,及时对其采取预防措施.这些举措延长了搅拌器的使用寿命,保证了尼龙六六盐生产线的平稳运行,减少了生产成本,提高了经济效益. 相似文献
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国内外染料工业发展新动向 总被引:1,自引:1,他引:1
本文阐述了国内外染料工业发展的新动向,指出了国外染料市场趋势和发展新特点:染料企业重组已趋平稳和进一步确立我国作为世界染料生产和供应中心的地位,在国际上设置"技术壁垒"和"贸易壁垒"的力度进一步加强,新染料的开发放到比较重要的地位,不断适应纺织工业新的着色要求;还指出了我国染料工业的发展新特点:市场活跃新品不断,出口增长,连创新高,新兴基地,发展壮大。注重染料质的提高,采用新技术和清洁工艺生产是我国染料工业发展的重中之重。有7篇参考文献。 相似文献
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A. Nurhan Becidyan 《Color research and application》1995,20(2):124-130
Papers and any printable surface that have value are subject to forgeries. Various methods of security printing are identified and utilizing luminescent pigments as security items are discussed. Problems with classical luminescent pigments because of toxicity and particle size are identified. A new range of luminescent pigments that are either excited by UV or IR are presented and their chemical and physical characteristics defined. Also samples from actual security applications are given. © 1995 John Wiley & Sons. Inc. 相似文献
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丁二烯萃取装置聚合物产生原因分析及对策 总被引:3,自引:0,他引:3
张斌 《化学工业与工程技术》2002,23(4):26-29
丁二烯抽提装置因其萃取溶剂二甲基甲酰胺及丁二烯本身的特性 ,在运行过程中易产生各类聚合物 ,堵塞设备、管线、阀门等 ,制约装置的运行负荷和周期。从理论上分析了装置中各类聚合物的特性及危害 ,总结聚合物产生的原因 ,结合生产实际 ,提出了相应的对策 相似文献
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采用Gc-MS分析方法,研究了稠油石化污水中有机物分布特征,分析结果表明,稠油石化污水中有机物以烷烃、酚类和有机酸为主并含有一定量的PAHs,污水中有机物分子量140以下的以酚类为主,分子量在140以上的有机物多为烷烃和PAHs,其中烷烃类主要为分子量在200~350的饱和烷烃为主,PAHs以含不同数量甲基取代基的萘为主. 相似文献
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Hygienic impeccable surfaces are, e.g., in food technology and healthcare facilities conditionally essential. Does a presence of fine particular contamination occur, adhesion forces between particles and surfaces are relevant. In this paper the cleaning‐process of materials, which are often used in cleanrooms are focused. The surface properties, which influence the dislodgement of particles are observed. There are two groups of materials used for the experiments, which are commonly used in hygienic relevant places in healthcare facilities. 相似文献
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Heating value of biomass and biomass pyrolysis products 总被引:3,自引:0,他引:3
Studies conducted on the heating value of various types of biomass components and their pyrolysis products such as char, liquids and gases are presented. Heating values of chars are comparable with those of lignite and coke; heating values of liquids are comparable with those of oxygenated fuels such as methanol and ethanol, which are much lower than those of petroleum fuels. Heating values of gases are comparable with those of producer gas or coal gas and are much lower than that of natural gas. It is also found that the heating values of products are functions of the initial composition of biomass; correlations are developed to express these. Also, correlations are developed which explain the influence of ash elements on heating values of the pyrolysis products and on percentage distribution of energy in the products. 相似文献
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Albert Erkip 《Polymer》2004,45(2):641-648
The fluctuations of residues of proteins about their equilibrium configurations are analyzed by the Langevin equation. Residue pairs that are covalently bonded and those that are within a given cutoff distance of each other are assumed to be connected by linear springs. The actions of the solvent and intramolecular interactions on each residue are treated as random noise. The correlations of fluctuations resulting from the solution of the Langevin equation are observed to be identical to those obtained by the Gaussian Network Model based on equilibrium statistical mechanics. The time-delayed correlations of fluctuations, and the response of the protein to a given frequency and to a window of frequencies are determined. The fluctuations of the residues resulting from a given fixed externally applied frequency are evaluated for different modes of the system. Synchronous and asynchronous components of correlations for different modes are formulated. The findings of the present paper are applied to the 241 residue protein S. marcescens endonuclease (1QL0). 相似文献
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减轻环境压力利用粉煤灰生产肥料 总被引:1,自引:0,他引:1
介绍粉煤灰的基本性质,总结目前各种粉煤灰肥料的特点和生产方法,对生产、作用机理进行分析,简单论述粉煤灰肥料的应用方法,并提出应注意的问题. 相似文献
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双组分聚氨酯胶黏剂的研究 总被引:1,自引:0,他引:1
合成了四种相对分子质量和官能度各不相同的聚酯多元醇,并与MDI反应合成了端羟基及端异氰酸基预聚体,通过红外光谱对其结构进行了表征。用聚醚多元醇与TDI及HDI反应合成了端异氰酸基预聚体。研究了不同体系的粘接性能及热失重情况,结果表明-OH/-NCO固化体系室温剪切强度为35~40MPa、90度剥离强度为5~7kN/m,-NCO/-NH2固化体系室温剪切强度为20~30MPa、90度剥离强度为6~15kN/m。研制的聚氨酯胶黏剂具有优异的耐磨、耐空蚀性能,可用于水轮机过流部件的修补及材料的结构粘接。 相似文献
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介绍聚丙烯酰胺合成技术现状,对比了各种聚丙烯酰胺合成方法的优缺点,并提出了合成聚丙烯酰胺的新方法和新技术以及聚合物在水处理、造纸、采油及其他领域的应用前景。分析了国内外的生产和消费状况,提出进一步发展的建议。 相似文献