石油炼制中加氢精制催化剂的制备技术探讨

石油炼制中加氢精制催化剂作多数为负载型催化剂,而负载型催化剂由于载体表面积、孔体积等因素影响了自身的活性。从加氢精制工艺的优点和制备流程入手,介绍了非负载型加氢精制催化剂制备方法,提出低硫柴油实施硫化态非负载型加氢精制催化的效果。     

低温CO催化氧化复合型非贵金属催化剂的研究进展

综述了复合型非贵金属催化剂在低温CO催化氧化反应中的研究进展,着重介绍了ABO3钙钛矿型负载氧化物、非钙钛矿型负载氧化物和尖晶石型氧化物这两类复合型非贵金属催化剂的制备方法及其催化性能,并对今后低温CO催化氧化非贵金属催化剂的研究方向作了展望。     

丁烯烷基化固体酸催化剂的研究进展

阐述了异丁烷 丁烯烷基化催化剂的发展状况,主要涉及了几种新型固体酸催化剂,包括固体超强酸催化剂、分子筛催化剂和负载型杂多酸催化剂。文章着重对SO2-4 MxOy、MCM-41和负载型杂多酸催化剂的制备,活性和选择性作了探讨。同时指出了这些固体酸催化剂存在的问题,预测了烷基化催化剂研究的发展方向。     

丙酸和丙酸乙酯的用途及生产路线

对丙酸及丙酸乙酯的用途及生产路线，以及丙酸与丙酸乙酯的各种生产方法的工艺路线和使用的催化剂作了介绍，对研究在双金属负载型催化剂，在常压条件下，气－固相乙醇羰化生产丙酸及丙酸乙酯的新技术路线具有深远的指导意义。     

多相铂催化剂在芳香族化合物加氢中的应用

介绍了负载型铂催化剂、高分子铂络合物催化剂和负载型含铂双金属催化剂等几种多相铂催化剂在芳香族化合物加氢中的应用及各自特点，展示这类催化剂在反应中具有良好的催化活性。     

负载型甲磺酸对合成乙酸异戊酯的催化性能研究

以活性炭、陶瓷球、石英砂、硅胶为载体负载甲磺酸，制得一系列负载型固体酸催化剂，用乙酸和异戊醇的酯化反应作探针反应，研究了这些固体酸的催化性能。结果表明，不同栽体的甲磺酸催化剂的活性与载体表面特性有关，CH3SO3^-／C催化剂对酯化反应显示出极高的催化活性，并可重复使用，在一定条件下，酯收率达97％。     

新型合成尿素用CO2原料气除氢催化剂的设计

本文介绍了合成尿素用ＣＯ２原料气除氢催化剂的理论设计依据。结合除氢催化剂的设计思想和负载型金催化剂的特性，对负载型金催化剂进行了除氢试验，结果表明负载型金催化剂具有广阔的应用前景，在催在性及耐硫性能上优于已工业应用的催化剂。     

甲乙酮合成仲丁胺凹凸棒土负载的Ni-B合金催化剂的研究

制备了凹凸棒土负载型Ni-B合金催化剂,考察了其对甲乙酮氢化胺化合成仲丁胺的催化活性.利用XPS、TEM等手段考察了不同酸浓度的处理对凹凸棒土载体以及由此得到的负载型催化剂的结构和催化性能的影响.并对性能优越的Ni-B/PAL-3催化剂作了简单的寿命评价实验.     

非晶态合金催化剂对不饱和化合物加氢研究进展

介绍了非晶态合金的制备方法与表征手段,分析了非晶态合金用作新型催化材料的可能性。对负载型非晶态合金催化剂用于含不饱和基团化合物的加氢性能作了较为详细的阐述。     

负载型杂多酸催化剂在烷烃异构化中的研究与应用

负载型杂多酸在许多反应中都显示出很高的活性和选择性,是化学工业中很有潜力的一种新型多功能催化剂。概述了负载型杂多酸催化剂的制备方法;详细分析了杂多酸酸性、负载的金属以及载体等因素对催化剂性能的影响;综述了负载型杂多酸催化剂催化烷烃异构化反应的研究进展,并对此类催化剂今后的研究发展方向进行了展望。     

负载型固体酸催化制备生物柴油研究进展

负载型固体酸催化剂具有无腐蚀、分离容易、对环境不产生污染、原料适应性广等优点,已成为制备生物柴油首选的绿色催化剂。本文综述了负载型固体酸催化剂制备原理、生产工艺、研究方法及其结构表征,分析了负载型固体酸自身结构与油脂酯交换反应催化活性的关系,预测了负载型催化剂在生物柴油制造业的应用前景。     

Liquid-phase catalytic oxidation of unsaturated fatty acids

Liquid-phase catalytic oxidation of oleic acid with hydrogen peroxide in the presence of various transition metal/metal oxide catalysts was studied in a batch autoclave reactor. Azelaic and pelargonic acids are the major reaction products. Tungsten and tantalum and their oxides in supported and unsupported forms were used as catalysts. Alumina pellets and Kieselguhr powder were used as supports for the catalysts. Tungsten, tantalum, molybdenum, zirconium, and niobium were also examined as catalysts. Tertiary butanol was used as solvent. Experimental results concluded that tungsten and tungstic oxide are more suitable catalysts in terms of their activity and selectivity. The rate of reaction observed in the case of supported catalysts appears to be comparable or superior to that of unsupported catalysts. In pure form, tungsten, tantalum, and molybdenum showed strong catalytic activity in the oxidation reaction; however, except for tantalum the other two were determined to be economically unfeasible. Zirconium and niobium showed very little catalytic activity. Based on the experimental observations, tungstic oxide supported on silica is the most suitable catalyst for the oxidation of oleic acid with 85% of the starting oleic acid converted to the oxidation products in 60 min of reaction with high selectivity for azelaic acid.     

壳聚糖修饰镍基催化剂用于二甲基紫脲酸加氢反应的研究

采用金属诱导化学镀法制备了负载型NiB/CS/EVg、Ni/CS/Al2O3催化剂,将其用于二甲基紫脲酸加氢反应.结果表明, 壳聚糖修饰的催化剂能较好的适应该反应.壳聚糖改性后催化剂的稳定性提高.     

合成氯乙酸酯催化剂的研究进展

文章详细介绍了目前国内不同的催化剂合成氯乙酸酯。这些催化剂主要包括:磺酸类、固载杂多酸、固体超强酸、无机盐、负载型催化剂,这些催化剂在化学反应中的使用改善了反应条件,提高了产品的收率,各有自己的优缺点。     

Activities of MFI-Supported Rhenium Catalysts for the Aromatization of Methane: Effect of Cationic Form of the Inorganic Carrier

MFI type inorganic carrier was used in two different cationic forms, hydrogen and calcium respectively. MFI-supported molybdenum and rhenium catalysts were prepared. The activities of the catalysts were compared for the aromatization reaction of methane. Higher activity values were attained with the catalysts supported on HZSM-5. Aromatics were also observed with the catalysts supported on CaZSM-5, despite their deficiency in acid sites. Highly dispersed rhenium is expected to be formed with the use of the inorganic carrier in calcium form. On the other hand, lower reaction rates were observed with rhenium supported on CaZSM-5, in spite of the improved dispersion of the active rhenium species on this catalyst. This was interpreted in terms of the critical role of the acid sites in the conversion of methane to aromatics, compared to the improved dispersion of the active metal.     

杂多酸的固载化及其酸催化研究进展

固载杂多酸作为新型固体酸催化材料,与传统的质子酸催化剂相比,其优点突出,在化工领域得到广泛应用。从杂多酸和载体的一些特性研究了几种典型的固载杂多酸催化剂,并对其性能、在催化领域中的应用及其发展前景进行了综述。     

A novel catalyst system based on quadruple silicoaluminophosphate and aluminosilicate zeolites for FCC gasoline upgrading

To develop a novel catalyst system that has excellent olefin reduction capability for FCC gasoline without loss in octane number, different catalysts supported on multiple composite carriers consisting of SAPO-11, Hβ, HMOR and HZSM-5 were prepared and their catalytic performances for FCC gasoline upgrading were assessed in the present investigation. The pore structure and acidity of the catalysts were characterized by N₂ adsorption and pyridine adsorption FTIR, respectively. Based on the results obtained over the catalysts supported on binary-zeolite carriers (Hβ/HZSM-5, HMOR/HZSM-5 and SAPO-11/HZSM-5) using FCC gasoline as the feedstock, various multiple-zeolite supported catalysts were developed from different combinations of the binary-zeolite systems. It was found that the SAPO-11/HMOR/β/ZSM-5 quadruple composite zeolite supported catalyst gave higher liquid yield, improved gasoline RON, and lower coke deposit amount for the hydro-upgrading of FCC gasoline and thus can be considered as a potential catalyst system. A comprehensive analysis based on the catalytic activities and acidity measurements revealed that acid strength and acid type were two very important factors influencing hydroisomerization and aromatization activities, and the difference in catalyst acid strength determined which factor predominates.     

负载杂多酸(盐)的表征及其在苹果酯合成反应中的催化性能

用浸渍法制备了一系列负载型磷钨酸及其铯盐催化剂,载体包括超稳Y沸石（USY）、脱铝超稳Y沸石（DUSY）、SiO₂和SBA-15,测定了催化剂的比表面积和酸强度,并在乙酰乙酸乙酯与乙二醇液相缩合制取苹果酯反应中考察了催化剂的性能.结果表明,这些负载型杂多化合物催化剂都表现出较高的催化活性.然而,催化剂在水中的溶脱性能实验表明,负载型磷钨酸催化剂存在严重的活性组分流失现象,不能重复使用,而DUSY负载的磷钨酸铯盐催化剂不仅表现出较高的催化活性,而且显示出较好的重复使用性能.在优化的反应条件下30% (质量分数) Cs_2.5H_0.5PW/DUSY催化剂上乙酰乙酸乙酯的转化率可达98.7%,苹果酯的选择性大于97%.     

改性丝光沸石催化剂上合成2,6-二异丙基萘

采用盐酸处理以及水热处理结合酸处理两种方法对氢型丝光沸石(HM)进行脱铝改性,制备了一系列脱铝HM催化剂,并以脱铝HM沸石为载体负载磷钨杂多酸(PW),制备负载杂多酸催化剂,用XRD、FT-IR和NH3-TPD等手段对这些催化剂的结构及酸性质进行了表征,在100mL间歇式不锈钢高压反应釜中对其在萘的异丙基化反应中的催化性能进行了考察。结果发现,随着脱铝深度的增加,HM沸石的酸量下降,酸强度降低,将PW负载于脱铝HM沸石载体上,其酸性质得到改善。上述催化剂的异丙基化反应结果表明,脱铝HM沸石的活性和2,6-DIPN选择性均大大高于未经改性的HM沸石;将PW负载于脱铝HM沸石上,其活性均有不同程度的上升,但对2,6-DIPN的选择性有所下降。催化剂的表征和反应结果显示,催化剂的活性和选择性与其孔结构和酸性质密切相关。     

多孔材料负载型催化剂催化酯化反应研究进展

将杂多酸、固体酸、磺酸等负载于各种多孔材料上制成负载型催化剂以替代传统的硫酸催化剂,对多孔材料负载型催化剂催化酯化反应的研究进展情况进行了综述;并对多孔材料的选择和负载型催化剂的发展进行了展望。