氯化铁催化乳酸的酯化作用

报道了氯化铁水合物催化乳酸和醇的酯化作用制备了１５种乳酯。     

水滑石类材料在水处理中的应用及研究进展

水滑石类材料是一类双金属层柱状化合物，因其具有特殊的层间离子交换性能和结构记忆效应，在水处理中主要作为催化剂和吸附剂（离子交换剂）加以应用，已经展现出良好的应用前景。本文针对国内外的研究现状，重点讨论水滑石类材料在水处理中的应用及最新研究进展。     

The effects of Cl-induced alloying in Pt–Sn/Al2O3 catalysts on butane/H2 reactions

The effects of oxidation/reduction regeneration treatments, with and without 1,2-dichloropropane present as a chlorinating agent, on the structure of Pt(3%)–Sn(4.5%)/Al₂O₃ catalysts have been correlated with selectivities for butane/H₂ reactions. Particles of Pt⁰ fin Cl-free catalysts were partly covered by Sn⁰, but retained exposed ensembles of Pt atoms which were active for isomerisation, hydrogenolysis and dehydrogenation reactions, the latter becoming dominant at high reaction temperatures. Coking reduced Pt ensemble size and, hence, also favoured high selectivities for dehydrogenation as hydrogenolysis and isomerisation sites became poisoned. In contrast, the addition of 1,2-dichloropropane in an oxychlorination step before reduction promoted 1:1 Pt⁰–Sn⁰ alloy formation after reduction, the proportion of the total Pt in alloy being enhanced by increasing 1,2-dichloropropane concentration and oxychlorination temperature. The alloy surfaces were inactive for isomerisation and hydrogenolysis reactions, giving dehydrogenation as the sole catalytic reaction.     

一水合硫酸氢钠催化β-萘甲醚的合成

利用一水合硫酸氢钠催化合成 β 萘甲醚 ,3 6 gβ 萘酚 ,3ml甲醇 ,1 5g一水合硫酸氢钠 ,80℃反应5h ,HPLC分析产率达 78 3%。固体催化剂容易过滤分离。     

对硝基苯甲酸催化酯化研究进展

综述了对硝基苯甲酸催化酯化的研究情况，重点介绍了直接酯化法催化剂的进展，包括酸催化剂和非酸催化剂。认为固体超强酸催化活性高，使用寿命长，易与产物分离，不腐蚀设备，无环境污染；相转移催化剂应用较多，酯化收率较高。     

液相催化调聚合成卤代烃的催化剂研究进展

综述了卤代烷与烯烃调聚合成卤代烃的催化剂体系，包括铜催化剂、铁催化剂、镍催化剂和复合金属催化剂等无载体型催化剂和负载型催化剂。     

丝光沸石择形催化合成甲胺反应的性能研究

制备了经阳离子改性的合成丝光沸石催化剂 ;以氨和甲醇为原料 ,在常压固定床上进行了合成甲胺反应研究 ,考察了工艺条件对催化剂催化性能的影响 ,并通过正交试验筛选出最佳工艺条件。结果表明 :经钙、镁离子交换的丝光沸石催化剂具有较高活性和良好选择性 ,甲醇转化率 >90 % ,对二甲胺的单程选择性 >40 %。自制的这种钙离子改性丝光沸石催化剂(CaHM)的催化性能优于目前国内工业化的甲胺生产催化剂 ,而且CaHM是经添加粘接剂焙烧成型的样品 ,可直接供产品的中试放大。     

相转移催化法合成多聚乙二醇二环氧甘油醚

以多聚乙二醇和环氧氯丙烷为原料合成了多聚乙二醇二环氧甘油醚。NaOH为催化剂,季铵盐为相转移催化剂。结论为:作为催化剂NaOH固体效果优于NaOH溶液;四正丁基硫酸氢铵(TBAS)催化醚化反应效果最佳,GC监测表明,二醚的选择性达98％以上;n(多聚乙二醇):n(环氧氯丙烷):n(NaOH):n(TBAS)= 1:10:7:0．08;反应温度55-60℃;反应时间1．5 h;产率83％。     

High-Throughput Experimentation in Oxidation Catalysis

High-throughput experimentation in catalysis comprises the following components: (i) automated high-throughput synthesis, (ii) testing in Stage I and Stage II, for which to some extent novel assays are necessary, (iii) data handling and experimental design tools, and (iv) robotics. This contribution covers these topics, using examples from the research of the authors, but also from the literature, in order to illustrate the problems and opportunities associated with high-throughput experimentation in catalysis, focusing particularly on heterogeneous catalysis.     

钌钯双金属催化剂固载顺序控制及性能

以Al_2O_3、PdCl_2和RuCl_3为原料,采用水溶液浸渍法,通过控制固载顺序、制备流程以及焙烧温度等条件,制得系列负载型Ru Pd双金属催化剂,并用于对苯二甲酸二甲酯(DMT)制取1,4-环己烷二甲酸二甲酯(DMCD)的选择性加氢过程。其中,Ru和Pd的总负载量为0.3%(以催化剂总质量为基准,下同),且m(Ru)∶m(Pd)=1∶1。结果发现,采用先Ru后Pd(Ru-Pd)式固载顺序和浸渍-干燥-浸渍-干燥-焙烧(IDIDC)型制备流程,并在450℃下焙烧后,所得负载型Ru-Pd双金属催化剂的反应性能最佳,在6 MPa、180℃下,DMT转化率为89.6%,DMCD选择性为96.0%,DMCD产率为85.9%。这可能与Ru-Pd中大粒径粒子的形成受到抑制、粒径尺寸和分布更小、比表面积和总孔容更高、表面Pd原子摩尔分数较高以及Ru/Pd物质的量比较低有关。