稠油石化污水有机污染物分布特征研究

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.     

国内外染料工业发展新动向

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。     

Beurteilung der Reinigbarkeit von Oberflächen bei partikulärer Kontamination

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.     

减轻环境压力利用粉煤灰生产肥料

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.     

近年新开发的农药品种

介绍了近年来新开发的14个农药品种,其中indaziflam等6个产品为除草剂,ametoctradin等6个产品为杀菌剂,sulfoxaflor和fluensulfone为杀虫剂。     

丁二烯萃取装置聚合物产生原因分析及对策

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     

多肽液相分段合成及其进展

本文综述了多肽的液相分段合成方法,这些合成方法是近年来多肽和蛋白质合成领域中的一种发展趋势.详细介绍了天然化学连接、化学区域选择连接、施陶丁格连接等方法,并对这些方法进行了比较,指出其优点及不足并提出改进办法.最后对多肽合成技术的发展做了进一步展望.     

Heating value of biomass and biomass pyrolysis products

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.     

杜邦工艺液相导生喷淋系统技改的探讨

在保证生产稳定的前提下 ,对主工艺液相导生喷淋系统进行改造 ,并逐步取消了液相导生喷淋 ,从而提高气相导生的效率 ,减轻热媒炉负荷 ,改善热媒使用状况 ,降低重油单耗     

Luminescent pigments in security applications

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.