异丙醇钇[Y（OC3H7）3]合成的研究

本文采用Ｉ２及ＨｇＣｌ２为催化剂，用金属钇和异丙醇直接反应合成了异丙醇钇，产率可达８３％以上， 而反应时间只需５个小时左右，超过已有文献的报道。     

异丙醇钇〔Y(OC_3H7)_3〕合成的研究

本文采用 Ｉ２ 及 Ｈｇ Ｃｌ２ 为催化剂,用金属钇和异丙醇直接反应合成了异丙醇钇,产率可达８３ ％ 以上,而反应时间只需５ 个小时左右,超过了已有文献的报道。     

六氟异丙醇的合成研究

介绍了六氟丙酮经气相催化氢化合成六氟异丙醇的方法，讨论了反应时间，反应温度及配料对比产率的影响。     

六氟异丙醇的合成研究

介绍了六氟丙酮经气相催化氢化合成六氟异丙醇的方法，讨论了反应时间、反应温度及配料比对产率的影响     

三氯化钇-异丙醇加合物合成异丙醇钇的研究

采用Y2 O3 为原料先制得无水YCl3 然后与异丙醇反应生成YCl3·3C3H7OH加合物 ,并采用自制异丙醇钠与之反应制备得到异丙醇钇 ,反应的最佳条件为 80℃回流 3～ 4小时 ,然后静置 12h以便NaCl的分离。在YCl3·6H2 O脱水制备YCl3 的过程中 ,采用醋酸酐脱水法 ,具有方法简单 ,污染小 ,且易于操作等特点     

锦州石化10万t级异丙醇工艺包 解决异丙醇生产高能耗老难题

锦州石化历时3年时间自主开发10万t级异丙醇工艺包,终于在2007年11月,确定了异丙醇合成工艺条件,一举解决了长期以来异丙醇生产高能耗的问题,实现装置节能49％,异丙醇单程产率提高10％,物耗下降5％,大大提高了异丙醇产品的盈利能力。[编者按]     

硫酸氢钾催化合成肉桂酸异丙酯

用硫酸氢钾催化肉桂酸与异丙醇的酯化反应,合成了肉桂酸异丙酯.研究结果表明,硫酸氢钾具有较高的催化活性.考察了肉桂酸/异丙醇摩尔比、催化剂用量、反应时间对酯产率的影响,以及催化剂的重复使用性能.在典型反应条件(肉桂酸/异丙醇/硫酸氢钾的摩尔比=1∶5.5∶0.48,回流3 h)下,所得肉桂酸异丙酯的产率为72.0%.该催化剂易于回收且可重复使用.     

节能的集成创新异丙醇技术

中国石油锦州石化公司历时3年自主开发的10万吨／年异丙醇工艺包，一举解决了长期以来异丙醇生产高能耗的问题，实现装置节能49％，异丙醇单程产率提高10％，物耗下降5％，大大提高了异丙醇产品的盈利能力。     

异丙醇胺的合成与应用

介绍了异丙醇胺合成工艺条件如反应温度、压力和物料配比等，并着重指出了异丙醇胺在各具领域中的应用。     

二异丙醇胺合成反应规律的研究

以一异丙醇胺及环氧丙烷为反应原料 ,研究了二异丙醇胺合成反应的规律 ,考察了反应温度及原料配比对反应的影响。     

Synthesis of Yttrium Aluminum Garnet by the Glycothermal Method

The reaction of a stoichiometric mixture of aluminum isopropoxide and yttrium acetate in 1,4-butanediol at 300°C yielded crystalline yttrium aluminum garnet having an approximate particle size of 30 nm. No other phases were detected. The use of ethylene glycol in place of 1,4-butanediol afforded an amorphous product.     

钇铝石榴石纤维的制备和应用研究进展

钇铝石榴石纤维具有耐高温、抗氧化、低导热率、优异的抗高温蠕变性和良好的光学性能,是一种理想的结构增强材料、绝热耐火材料和光学材料.本文重点评述了近年来钇铝石榴石纤维制备和应用的研究进展,并展望了钇铝石榴石纤维制备和应用的发展趋势.     

Highly Active and Diastereoselective N,O‐ and N,N‐Yttrium Complexes for Intramolecular Hydroamination

The intramolecular hydroamination of aminoalkynes and unactivated aminoalkenes catalyzed by yttrium N,O‐ and N,N‐complexes has been investigated. The N,N‐yttrium complexes are highly active, catalyzing the conversion of a wide range of terminal aminoalkenes at room temperature, and internal aminoalkenes at elevated temperature, to yield pyrrolidine and piperidine products in high yields. A high diastereoselectivity of up to 23:1 is observed at 0 °C with 1‐methyl‐4‐pentenylamine as substrate.     

固相反应合成铋酸钇

以Y2O3、Y(C2H3O2)3和Bi2O3为原料,采用高温固相反应合成铋酸钇(YBiO3)。借助热重-差热、X射线衍射、SEM等分析手段,探讨了不同原料、煅烧温度、保温时间、预烧等因素对铋酸钇合成的影响。结果表明:高温固相反应能够合成高纯度的铋酸钇;与Y(C2H3O2)3相比,Y2O3是合成YBiO3的较佳原料,其合成YBiO3的最低温度是766℃左右,YBiO3的开始分解温度是917℃左右;合成YBiO3的较佳工艺为两磨两烧,在800℃预烧90min,其较佳工艺参数为煅烧温度为900℃,保温时间120min。     

Atomic structure and dissolution properties of yttrium-containing phosphate glasses

We have conducted classical molecular dynamics simulations of three compositions of yttrium-containing phosphate glasses, to study the atomic structure around yttrium, and understand how yttrium incorporation will affect the glass dissolution rate. The Y-O bond length is about 2.2 Å and the coordination number is 6.3. To avoid effects due to different network connectivities, our compositions were chosen to keep the Qⁿ distribution and network connectivity roughly constant, which was confirmed through direct calculation. For these compositions, the structure of the phosphate network is comprised of finite-length chains of PO₄ tetrahedra bound to the network modifiers. We showed that yttrium bonds to 4.2-4.3 of these chains, compared to 3.8 for calcium, and 3.1-3.2 for sodium. This implies that yttrium will bond more parts of the glass to the same place, and therefore, that yttrium incorporation will strengthen phosphate glass against dissolution, making it potentially suitable for radiotherapy applications where a durable glass is required.     

超细氧化钇粉体的研究进展

综述了氧化钇纳米粉体的应用及研究现状,着重介绍了共沉淀法、喷雾热解法、溶胶一凝胶法以及近几年开发的高分子网络凝胶法等7种制备氧化钇粉体的方法。     

Study on liquid‐phase hydrogenation of paranitrotoluene over Ru‐based catalysts

This paper presented a study on the role of yttrium addition to Ru‐based catalysts for liquid phase paranitrotoluene hydrogenation reaction. An impregnation‐precipitation method was used for preparation of a series of yttrium doped Ru/NaY catalysts with yttrium content in the range of 0.0026–0.0052 g/g. Properties of the obtained samples were characterized and analyzed by X‐ray diffraction (XRD), H₂‐TPR, Transmission electron microscopy (TEM), ICP atomic emission spectroscopy, and Nitrogen adsorption‐desorption. The results revealed that catalytic activity of NaY supported Ru catalysts increased with the yttrium content at first, then decreased with the further increase of yttrium content. When yttrium content was 0.0033 g/g, a Ru‐Y/NaY² catalyst showed the most excellent performance of paranitrotoluene hydrogenation reaction (paranitrotoluene conversion and the selectivity toward P‐methyl‐cyclohexylamine reached 99.9 % and 82.5 %, respectively). In addition, to compare with the performance of Ru‐Y/NaY catalysts, the active carbon supported Ru catalysts were prepared using the same method in view of its higher surface area and adsorption capacity. Finally, the effect of solvent on the reaction over Ru‐Y/NaY² catalyst has been investigated, it was found that the best performance of paranitrotoluene hydrogenation reaction took place in protic solvents (isopropanol and ethanol). This was mainly ascribed to their polarity and hydrogen‐bond accepting capability.

     

Optical and Scintillation Properties of Ce3+‐Doped LuAG and YAG Transparent Ceramics: A Comparative Study

Cerium‐doped lutetium aluminum garnet (LuAG:Ce) and yttrium aluminum garnet (YAG:Ce) transparent ceramics of same dimension were fabricated and their optical and scintillation properties were studied. LuAG:Ce transparent ceramic showed higher light yield under UV and X‐ray excitation with respect to YAG:Ce transparent ceramic. YAG:Ce transparent ceramic showed higher light yield under gamma excitation and better energy resolution, which could be due to the considerable amount of slower emission (38.5%) in LuAG:Ce as well as lower optical transparency with respect to YAG:Ce ceramic.     

微乳液法制备纳米球形YAG:Ce3+荧光粉及其发光性能

采用反相微乳液法,以水/曲拉通X-100/正己醇/(环己烷 正己烷)为微乳体系,铝(Al)、钇(Y)和(Ce)的硝酸盐和氯化物作为起始反应物,氨水作为沉淀剂,成功制备了纳米球形铈掺杂钇铝石榴石(cerium doped yttrium aluminum garnet,YAG:Ce3 )荧光粉.实验表明:单相YAG可以在800℃合成,比周相反应法合成温度(1 500℃)大幅度降低.用失重-差热分析仪、Fourier变换红外光谱仪、X射线衍射仪、透射电镜、荧光分光光度计等对粉体特性进行了表征.结果表明:粉体颗粒粒径约为50nm,粒度分布均匀,球形度好,分散性好,粉体的激发光谱为双峰结构,主激发波长为469nm,发射波长为532nm,适用于白光发光二极管.