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- PREPARATION OF A NOVEL SHAPE SELECTIVE CATALYST OF TOLUENE DISPROPORTIONATION FOR P-XYLENE 制取对二甲苯的新型甲苯择形催化剂的研制
- Keywords monomethylamine;mordenite;shape selective catalyst;modification by ion exchange; 甲胺;丝光沸石;择形催化剂;离子交换改性;
- The catalytic dewaxing (CDW) of lube oil fractions with shape selective zeolite catalyst before and after the removal of basic nitrogen was compared. 本文比较了润滑油馏分脱除碱性氮化物前后的催化降凝效果(采用择形分子筛崔化剂)。
- The olefines (mainly C4 olefines)in the liquefied petroleum gas under the action of a selective catalyst were polymerized to form heigher molecular weight diners and trimers. 石油液化气中的烯烃(主要是碳四烯烃)在定向催化剂的作用下,选择叠合成分子量较大的聚合体。
- Selectoforming process was the first commercial catalytic process employing a shape selective zeolite catelyst. 选择重整工艺是使用择形沸石催化剂的第一个商业催化工艺。
- A highly selective catalyst for ODP is obtained by oxidizing CNF in concentrated HNO_3 and using(NH_4)_2HPO_4 as precursor for phosphoric oxides. At 500℃,a 39.63% selective to propene is achieved at a 42.07% propane conversion. 以磷酸氢二铵为前驱体;负载于经液相氧化处理的CNF上可以得到高选择性的ODP过程催化剂;在500℃下;丙烷转化率为42.;07%25时;丙烯选择性达到39
- Indcating effective suppression of trimethylamine(TMA) format ion over the zeolites, which is due to the shape selective catalysis of zeolites. 对三甲胺表现出明显的抑制效应可归结于沸石的择形催化效应。
- High reaction temperature and the existence of shape selective zeolite were in favor of benzene formation during cumene cracking. 高温和择形分子筛有助于提高异丙苯裂化生成苯的产率和选择性；
- The results showed that the shape selective effect of the faujasite is obvious, and the thermodynamic balance exists between 2,6 DTBN and 2,7 DTBN. 结果表明,八面沸石对该反应过程有较好的择形催化作用,两种异构化产物(2,6二叔丁基萘和2,7二叔丁基萘)之间存在着热力学平衡,即两种异构化产物可在酸性中心位上相互转化。
- The latest application of zeolites shape selective catalysis in the production of ethylbenzene or cumene, along with synthesis of methylamine was briefly described. 综述了90年代以来分子筛择形催化在利用炼厂气合成乙苯、异丙苯和甲胺等工业生产方面的最新应用。
- With the shape selected, type the text you want the main idea to represent. 选取该形状,键入要表达中心思想的文字。
- selective catalyst reduction (SCR) 选择催化还原
- A better understanding of the reaction mechanisms and the involved intermediates as well as their conversion dynamics on the catalyst surface is the key for the design of the active and selective catalysts. 为达到从动力学控制反应的目的，对有关催化剂体系上反应所涉及的中间体及其转化动态学的研究还有待深入。
- The physicochemical features of ZSM 5 zeolite modified with phosphorus oxide were characterized by XRD, NMR, IR and BET, and the shape selective catalytic performance of the samples were investigated on MAT and fixed fluidized bed reactor. 采用磷氧化物对ZSM 5沸石进行修饰改性 ,用XRD、NMR、IR、BET等物化手段对改性后沸石的物化性质变化情况进行了表征 ,并采用轻油微反和小型固定流化床催化裂化装置对改性后的样品进行了反应性能评价。
- The primary trends are that highly active and selective catalysts for different structure to be aromatic substrates are of exploited,and the ammoxidation ... 指出开发适合不同结构的芳香底物氨氧化反应的高活性、高选择性的催化剂,并对其进行深入的理论研究是今后的发展方向。
- To meet the needs for study the shape selectivity of zeolite molecular sieves,an approach for estimation of molecular dimensions was developed. 为满足研究沸石分子筛择形选择性的需要，对分子尺寸的估算进行了探讨。
- Layered compounds have many functional characteristics, such as shape selecting catalysis, heat stability, and can be used in lithium batteries, superconducting materials and etc. 具有多种功能特征:如择形催化作用、热稳定性、用做锂电池材料和超导材料等。
- If we can pull through this recession, we will be in good shape. 如果我们能渡过这段经济不景气的时间，我们就会好多了。
- I am in no shape worthy of your father's care. 我完全不值得你父亲的关怀。
- A strange shape could be seen through the fog. 在雾中隐约可见到一个奇怪的人形。
