Separation of Impurity Vanadium from TiCl4 by Means of Adsorption

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直馏航煤赛比不合格的原因及对策

概述了直馏航煤的生产过程,并对直馏航煤出现的质量问题,考察了不合格原因,提出了解决办法。保证了直馏航煤质量合格率100%。     

MCM—41中孔分子筛的研究和开发

介绍了近期国内外中孔分子筛ＭＣＭ－４１的研究情况，阐述了其合成机理并简述了其性能和应用。     

气相色谱法分析Ar+N2含量准确性的探讨

探讨了采用TDX-01碳分子气相色谱法分析高、低变出口气中Ar N2的含量时，高变出口气中Ar N2的含量比低变出口气中Ar N2的含量低的原因。采用峰高测量法代替峰面积测量法，可以消除数据处理机对色谱峰重叠处理时造成的偏差，测定值与实际值相符合，得到令人满意的结果。     

SELECTIVE OXIDATION OF ALCOHOLS BY REDOX MOLECULAR SIEVES

High-throughput synthesis and screening of libraries consisting of redox zeolites and molecular sieves have been developed for the selective oxidation of 2-butyl-5-hydroxymethyl-imidazole to the corresponding aldehyde in the liquid phase. Libraries consisting of 96 catalysts were prepared and screened for catalytic activity using high-throughput software, robotics, reactor, and screening technologies. The integrated synthesis and screening workflow allowed ～5000 samples to be screened in less than one month. Promising hits identified in the high-throughput primary screens were successfully scaled up and optimized in conventional laboratory test units. Best results have been obtained with doubly or triply doped mesoporous sieves containing both an impregnated and framework-substituted metal. PtBi-doped framework-substituted V-MCM-41 redox mesoporous sieves were found to be efficient catalysts for aerobic oxidation under relatively mild reaction conditions (100–150°C, 15–400 psi air, 4–10 h reaction time). MIBK/H₂O/t-BuOH mixtures were identified as efficient solvent systems for this reaction. Isolated yields confirm high selectivities of more than 90% with quantitative conversions. Spent catalysts were shown to be fully regenerable by high temperature calcination in air.     

Kinetics of Isothermal Ethanol Adsorption onto a Carbon Molecular Sieve under Conventional and Microwave Heating

The isothermal kinetics of ethanol adsorption from aqueous solution onto a zeolite type carbon molecular sieve (CMS‐3A) under conventional heating (CH) and microwave heating (MWH) was investigated. The adsorption kinetics is described by the model of a phase‐boundary controlled reaction for both heating modes. The activation energy (E_a) for the adsorption process under MWH is lower than under CH while the preexponential factor (lnA) is higher. Ethanol adsorption is a kinetically complex process whose complexity changes with the mode of heating. The established decrease in E_a and increase in lnA under MWH compared to CH is explained with the increase in the ground vibrational level of the – OH twisting vibrations in the ethanol molecule and with the decrease in its anharmonicity factor which is caused by the selective resonant transfer of energy from CMS‐3A to the OH oscillators.     

珍珠岩尾砂制备4A分子筛及性能研究

将珍珠岩尾砂与氢氧化钠混合焙烧,焙烧料溶解后用水热合成法制备了4A分子筛。研究了焙烧及合成因素对产品性能的影响,制备的产品性能达到了国家分子筛用质量标准。为珍珠岩的综合利用开辟了新途径,为4A分子筛的制备提供了一种廉价原料。     

合成新型微孔-中孔复合分子筛NaX/MCM-41的实验研究

利用天然矿物钾长石和工业原料水玻璃,在水热条件下合成出中孔-微孔复合分子筛NaX/MCM-41,并通过X射线粉末衍射(XRD),N2吸附-脱附等温线,扫描电镜(SEM)等手段对样品进行了表征。     

粉煤灰制备4A分子筛预处理过程的优化研究

在分析粉煤灰的矿物组成和化学成分的基础上,设计了粉煤灰制备4A分子筛预处理过程的工艺流程,并根据流程重点介绍了粉煤灰的粉末细度、焙烧、酸溶活化和除杂等方面的参数选择情况,制备出符合要求的预处理样品,为进一步合成4A分子筛创造了条件。     

不锈钢焊接弧形筛网的使用和应注意的几个问题

阐述了作为弧形筛关键易损件的不锈钢焊接弧形筛网的工作原理、结构特征和实际应用。针对不同的工况条件,探讨了影响不锈钢焊接弧形筛网使用效果的主要因素及使用过程中需要注意的问题,以求不断改进,使其达到最佳的工艺效果。