壳聚糖硫酸盐催化合成苯甲酸甲酯

以壳聚糖硫酸盐为催化剂，由苯甲酸和甲醇合成苯甲酸甲酯。考察了催化剂用量、反应时间及醇酸摩尔比等因素对反应的影响，实验结果表明，在催化剂用量为1.0g，反应时间4h，醇酸摩尔比为5：1的条件下，产品收率达90.56%，并且催化剂可重复使用多次。     

新型钌系聚吡咯络合物的合成,结构和表征

采用电化学方法成功地合成了钌掺杂聚吡咯络合物（ＰＰＲＵＣ），ＰＰＲＵＣ是一种很稳定的非晶态络合物，合成掺杂聚吡咯络合物来改变催化剂的存在形态，使催化剂与反应物和产物很好地分离。用物理吸附仪对ＰＰＲＵＣ进行了比表面积和孔容等的测定，用红外和电子能谱对ＰＰＲＵＣ进行了表征，用元素分析仪测定了ＰＰＲＵＣ含Ｃ、Ｎ、Ｈ的比。根据测定结果和文献报道推断了ＰＰＲＵＣ的基本结构。     

调血脂药物阿伐他汀的合成路线

阿伐他汀是一个高效、安全的调血脂药物,具有广阔的市场前景.作者综述了其经典的合成方法有Paal-Knorr法、不对称还原羰基法、消旋体苯乙胺拆分法、选择性醇醛缩合法等方法.为阿伐他汀的工业化发展和创新打下基础.     

对氨基苯酚合成工艺的改进

介绍了对氨基苯酚的一种合成工艺 ,探讨了反应条件对产品收率的影响 ,初步得出了适宜的工艺条件。本法具有综合成本较低、操作方便、设备简单等优点     

聚硅硫酸铁的合成及性能研究

本文探讨了聚硅硫酸铁的合成途径，确定了最佳Si/Fe摩尔比，最佳活化温度，最佳活化时间。通过性能测试，证明聚硅硫酸铁是比聚合硫酸铁性能更优良的絮凝剂。     

Solution combustion synthesis and sintering behavior of CaAl2O4

The influence of the quantity of urea on the synthesis of calcium aluminate by solution combustion method was studied. It was shown that the amount of urea has a big influence on morphological characteristic and phase composition of the combustion products.The sintering behavior of the combustion products, before and after milling, was studied by rate controlled sintering method, based on which a thermal schedule was designed improving the sintering of CaAl₂O₄.     

Methane tri-reforming over a Ni/β-SiC-based catalyst: Optimizing the feedstock composition

Tri-reforming of methane has proved to be a highly efficient process for obtaining synthesis gas suitable for use in the Fischer–Tropsch process and methanol synthesis. In this paper the influence of the feedstock composition on methane conversion, the H₂/CO molar ratio of the synthesis gas obtained by tri-reforming of methane and the heat released or supplied to the system with a Ni/β-SiC catalyst are all described. Firstly, a factorial plus central composite design of experiments was chosen in order to optimize the independent variables selected. Then, using the experimental data obtained, a quadratic model was built. It was observed that the effect of both water and oxygen volume flow on the H₂/CO molar ratio was positive while that of methane and carbon dioxide volume flow was negative. Finally, in order to obtain an energetic optimum inside the target region, the influence of the independent variables studied previously on the overall reaction heat was calculated.     

Synthesis of 1- and 2-Chloro-7 H -benz[ de ]anthr-7-one

Chloro-7 H -benz[ de ]anthr-7-ones (chlorobenzanthrones) are useful as starting materials for synthesis of larger polycyclic aromatic compounds by means of condensation. In the synthesis, the position of the chlorine atom is very important because the structure of condensation products strongly depends on it. For this reason, we have synthesized several chlorobenzanthrones. Although 3- and 4-chlorobenzanthrone were prepared by direct chlorination of benzanthrone and by glycerol condensation of 2-chloroanthraquinone, respectively, the synthesis of 1- and 2-chlorobenzanthrone has not yet been successful. In the present study, we attempted to synthesize them by use of the Sandmeyer reaction. First, we nitrated benzanthrone with nitric acid; 1- and 2-nitrobenzanthrone were obtained by nitration in nitrobenzene at 50-60° and in glacial acetic acid at 105-110°, respectively. Then the nitroderivatives were reduced to corresponding aminoderivatives; the reduction was performed with sodium sulfide for 1-nitrobenzanthrone and with hydrogen chloride and tin for 2-nitrobenzanthrone. Finally, chlorination was carried out by use of the Sandmeyer reaction. The products were separated and purified by column-chromatography. The position of chlorination was confirmed by NMR spectroscopy.     

光机结构C4P综合设计/制造体系

结合光机结构的设计与制造,提出了C4P综合体系,对其基本组成部分做了论述,并给出一个实例的软硬件构成。最后简略叙述了C4P综合设计与制造体系的实现策略。     

氧氮化铝陶瓷的合成与应用

介绍了氧氨化铝的基本性能、合成研究的最新进展、烧结及其抗氧化性、热稳定性和应用。