Supercritical Fluid Carbon Dioxide in the Extraction of Lanolin and Its Alcohol

The use of supercritical fluid carbon dioxide (SF-CO_2) in extraction of lanolin and its alcohol issuperior to the conventional solvent extractionmethod. Its distinctive advantages include highextractive ratio, nontoxic and nonflammablesolvents, and minimal by-product pollution. The     

硼/磷系阻燃剂协同效应的研究

合成了几种新型的有机硼阻燃剂,与含磷阻燃剂对棉织物进行协同阻燃研究,以试样的限氧指数LOI为评价指标,计算出协同指数,证实了阻燃剂之间协同效应作用的存在。     

浅谈“学生问题”解决能力提高的途径

改进小学数学课堂教学方法,高度重视培养学生问题解决能力,已成为当今数学教改研究的焦点,本文( )子生问题解决"能力提高的途径谈几点个人浅见.     

Built-up Effect of Core Material for Microencapsulated Flame Retardant Containing Dimethyl Methyl Phosphate

The flame retardants containing organophosphorus compounds have extensively been used inthe flame retarding of polymer materials.Among others,dimethyl methyl phosphate (DMMP) was applied in flame retarding of polyurethane owmg to its so much merit.However,the water-soluble property of DMMP restricted its application in textile fabric.The flame retardtag systemcontainirm DMMP will be microencapsulated to form a novel flame retardant that could be used in textiles.We have studied the builtup effect of DMMP with some inorganic compounds to improve the afterflame and afterglow suppression in the flame retarding system.The experimeatal data indicated that inorganic compounds containing various non-metal elements P,N,B and metal ions Mg2 ,Al3 ,Ca2 ,Zn2 ,Cu2 ,Mn4 could be applied in flame retarding systems as additives to effectively suppress afterflame or afterglow.     

W/O/W法制备甲基膦酸二甲酯微胶囊

以水溶性有机膦甲基膦酸二甲酯作为芯材，以聚乙烯醇与戊二醛反应所得缩醛为壁材，应用相中相乳化法合成DMMP微胶囊。并对影响微胶囊合成的因素进行了讨论。通过DSC热分析、红外光谱分析、囊芯物磷的定性检测等测试方法表征了甲基膦酸二甲酯微胶囊的壁材与囊芯物。     

2-苯基吲哚-5-磺酸的合成及表征

采用对磺酸苯乙酮苯腙闭环合成2-苯基吲哚-5-磺酸,首先研究合成目标产物的中间体——对磺酸苯乙酮苯腙制备过程中的酸度及反应时间对制备反应的影响,同时还选择了适当的溶剂.接着又考察了反应物配比、温度及反应时间对目标产物合成反应的影响,并对产物结构进行了表征.实验表明,产品不仅纯度好,且收率高,结果令人满意.     

低年级数学新课导入方式探究

课堂的第一重锤要敲在学生的心灵上，激发他们思维的火花，好像磁石一样，把学生牢牢地吸引住。为整堂课的和谐发展定下基调，有如“春色初展，鲜花含露，叫人钟情”。     

Preparation and Structural Analysis of Lanthanide Complexes with α-Hydroxyl-phenyl-acetic Acid and 1, 10-Phenanthroline as Ligands

A series of ternary lanthanide complexes Ln （C6H5CHOHCOO）3（phen） （H2O） （Ln= La, Ce, Pr, Nd, Sm, Eu） were synthesized with α-hydroxyl-phenyl-acetic acid and 1, 10-phenanthroline （phen） as ligands. The sturcture and property of complexes were characterized by elemental analysis, IR, 1^H-NMR, UV and TGA, and the coordinate mede of both ligands was discussed. It was shown that the co-ordinate mode of 1, 10-phenanthroline was chelated, while α-hydraxyl-phenyl-acetate ion was monedentate or bridging. The mechanism of thermal determinde by thermogravimetry was indicated that the degree of co-ordinate ability of ligand was： α-hydroxyl-phenyl-acetate ion 〉 1, 10- phenanthroline（phen）.     

三苯基氧化膦萃淋树脂对金的吸附性能和机理的研究

从动力学和热力学的角度探讨了三苯基氧化膦(TPPO)萃淋树脂对金的吸附,考察了它吸附金时的吸附速率、吸附反应级数、热焓和吸附容量,得出TPPO 萃淋树脂对金的吸附是单分子层的化学吸附,初步认为符合Langmuir吸附理论.此树脂在酸性条什下对金的最大吸附量为42mg(Au)/g(干树脂).     

P204—萃淋树脂分离富集金的研究

近年来，人们对金的需求不断增长，而砂金矿资源日益枯竭，人们已把目光转向由伴生矿和低品位矿中金的开采。目前，从低品位金矿中提炼、富集金的方法虽然很多，但用萃淋树脂对金矿中作分离、富集提取手段的报道还不多见，本文用Ｐ２０４－萃淋树脂制成的交换柱，以ＮＨ４ＳＣＮ（１０％）／ＮＨ４Ｃｌ（１０％）（１＋１ｖ／ｖ）作为洗脱剂，对低品位贫矿中微量的金作了分离、富集提取的研究，结果可使金的浓度富集达１０＾３倍，同