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The optimum conditions were reaction temperature 120°C, reaction time 20h, mole ratio of 5-chloromethyl-2-oxazolidinone and sodium phenolate 1:1. 3,5-Dimethylphenol and epichlorohydrin in sodium hydroxide were condensated to give l,2-epoxy-3-phenoxy propane, then the reation of l,2-epoxy-3-phenoxypropane and the carbamate afforded oxazolidinone in the yields of 69.0%~76.0%. The side reaction had been avoided effectively by the uses of the excessive epichlorohydrin and mixed catalysts.

用3，5-二甲基苯酚和环氧氯丙烷在氢氧化钠存在下缩合生成苯氧基环氧丙烷，然后和氨基甲酸酯反应生成噁唑烷酮，采用过量环氧氯丙烷和使用混合催化剂，有效的避免了副反应的发生，提高了噁唑烷酮的产率，产率69.0%～76.0%。

A series of supported tungsten phosphide catalysts were prepared by the method of temperature-programmed reduction of phospho-tungstate in hydrogen.

本文采用氢气程序升温还原磷钨酸盐的方法，制备了一系列负载型磷化钨催化剂。

The active phase transformation of the phosphide catalysts was characterized by means of in-situ XRD and TPR technique.

尽管对新型催化材料磷化物的研究才刚刚起步，但很多研究手段如CO化学吸附

Supported tungsten phosphide catalysts were prepared by mixing and co-impregnation method.

并采用各种现代分析手段对合成的无负载和负载型WP催化剂进行了表征。

A series of bulk nickel phosphide catalysts containing TiO_2 were prepared by two methods and investigated in HDN of quinoline.

用两种方法将TiO_2引入非负载的磷化镍催化剂中，考察其对喹啉的HDN反应。

The precursors of nickel phosphide and molybdenum phosphide catalysts were prepared by co-impregnation method.

过渡金属磷化物被认为是一种高活性、高稳定性和具有抗硫中毒性能的新型催化材料。

Nickel phosphide catalysts supported on different supports were prepared and their performances were investigated in HDN of quinoline.

用几种不同性质的载体MCM-41、SiO_2、TiO_2、HY、γ-Al_2O_3制备了负载型磷化镍催化剂，比较了它们对喹啉的HDN反应活性。

Results show that phosphoric acid (85%) and sulfuric acid (36%) are better than other catalysts.

结果表明，磷酸和低浓硫酸是木材苯酚液化效果较好的催化剂。

In this paper, the latest progress in the research of chiral phosphoric acid catalysts for relevant asymmetric reactions is reviewed.

本文主要综述了手性磷酸催化剂应用于亚胺相关反应的研究进展。

Chapter 4. Due to their large specific surface area and the photogenerated electron-hole pairs under solar illumination, semiconductor NPs have been used as catalysts in the photodecomposition of organic pollutants.

第四章，半导体纳米粒子由于拥有高的比表面积，且可以吸收太阳光并且发生电子和空穴的分离，是一类高效的有机污染物光降解反应的催化剂。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐