acidity相关论文
Computer simulation of the preparation process loading rare earth(RE)directly from acidic extractant and RE chloride was......
The catalytic activity of trimethyl phosphite modified HZSM-5 zeolite and un-modified HZSM-5 zeolite treated with 100% s......
A new zinc acetate catalyst which was prepared from modified activated carbon exhibited extreme activity towards the syn......
The effect of acidity and redox capability over sulfuric acid-modified CeO2 catalysts were studied for the selective cat......
采用超景深光学显微镜（OM）、扫描电镜（SEM）、能谱仪（EDS）、显微硬度计对锆合金702焊缝的显微组织与力学性能进行观察和分析;对锆合金焊缝......
为了提高以N2O5为硝化剂的硝化体系硝解3,7-二硝基-1,3,5,7-四氮杂双环[3,3,1]壬烷(DPT)制备HMX的收率,考察了在N2O5/HNO3/有机溶......
Novel catalysts of phosphotungstic heteropolyacids (PW1,2) supported on neutral alumina were prepared by assistance of u......
Two series of Cu/ZSM-5 catalysts,loading from 5 to 20 wt% CuO.were prepared by thedeposition-precipitation and impregnat......
Olefin alkylation of thiophenic sulfur process was carried out in model gasoline, using Hβ zeolites with different Si/A......
Effects of ammonium exchange and Si/Al ratio on the conversion of methanol to propylene over a novel
One type of ZSM-5 zeolite with large partical size was prepared and characterized by XRD, SEM, N2 adsorption-desorption,......
A detailed study on the synergetic effect of TeMo5O16 and MoO3 phases in the MoTeOx catalysts for the partial oxidation ......
An effective route to improve the catalytic performance of SAPO-34 in the methanol-to-olefin reactio
An effective route to improve the catalytic performance of SAPO-34 in the methanol-to-olefin reaction by simple oxalic a......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
Effect of pH values on the extracellular polysaccharide secreted by Acidithiobacillus ferrooxidans d
The pH value plays an important role in the bioleaching of sulphide minerals. The effect of pH values on the extracellul......
C5-C8烷烃异构化反应是提高汽油辛烷值的重要手段,已成为人们的研究热点.综述了近年来C5-C8烷烃异构化反应中应用的改性分子筛催化......
分别采用溶胶-凝胶法和共沉淀法制备了TiO2-SiO2复合氧化物,并以此复合氧化物为载体制备了加氢脱硫催化剂。采用氮气恒温吸附脱附......
采用“沉淀-浸渍”法制备一系列不同硫酸负载量的SO2-4/ZrO2-Al2O3催化剂,利用N2吸附-脱附、Py-FTIR、XRD等手段对催化剂进行表征.......
Effect of surface acidity and pore size of Al-substituted plugs-containing SBA-15 and MCM-41 silicas
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
目的：探索研究中成药固体制剂的酸度。方法按照2010版《中国药典》二部（附录VI H）项下，测定样品水溶解后的溶液的pH值。结果17家药厂生......
Auto-catalysts were the largest consumers of platinum group metals and the most important secondary resources,recovery o......
分别采用氟硅酸铵液相反应法和高温水热硝酸法对Y型分子筛进行了改性,并借助X射线衍射仪、NH3-程序升温吸附法和27Al-核磁共振对改......
Mesoporous tetragonal sulfated zirconia with high surface area and narrow pore-size distribution was prepared using Zr(O......
Effects of ammonium exchange and Si/Al ratio on the conversion of methanol to propylene over a novel
One type of ZSM-5 zeolite with large partical size was prepared and characterized by XRD, SEM, N2 adsorption-desorption,......
以沉淀法、水热合成法和浸渍法制备了磷酸锆催化剂，通过X射线衍射、热重分析、氮气物理吸附、红外光谱和Hammett指示剂法对催化剂进......
The successful production of higher hydrocarbons from methane depends on the stability or the oxidation rate of the inte......
Effect of acidity of drugs on the prediction of human oral absorption by biopartitioning micellar ch
Biopartitioning micellar chromatography (BMC) is a potentially high throughput and low cost alternative for in vitro pre......
Effects of acidity and mesoporosity development in ZSM-5 on biomass-derived ethylene oligomerization
...
Mesoporous Silicoaluminum Pillared Clays with High Thermal Stability and Brφnsted/Lewis Acidity by O
Mesoporous silicoaluminum pillared clays have been synthesized by one-pot gallery-templated synthesis using organomontmo......
系统地研究了SO2-4/ZrO2-SiO2催化剂的酸性和比表面积,采用吸附吡啶的红外光谱法、BET法以及指示剂法考察了催化剂的组成、温度以......
Effect of Water Vapour on the Acidity of ZSM-5Zeolite Used for Catalytic Cracking of Naphtha to Manu
The change in acidity of the ZSM-5 zeolite was investigated after it was treated with water vapour,and its capability on......
A detailed study on the synergetic effect of TeMo5O16 and MoO3 phases in the MoTeOx catalysts for the partial oxidation ......
Various type of cesium partially substituted phosphotungstate,Cs_xH_(3-x)PW_(12)O_(40)(x = 1.0,2.0 and 2.5),were synthes......
An effective route to improve the catalytic performance of SAPO-34 in the methanol-to-olefin reactio
An effective route to improve the catalytic performance of SAPO-34 in the methanol-to-olefin reaction by simple oxalic a......
摘 要：目的：研究海带多糖的添加对酸奶品质的影响。方法：将海带多糖添加至脱脂乳中，经发酵后，通过测定酸奶的黏度、pH、酸度等指标，获得......
介绍了副产蒸汽石墨合成炉钢制夹套的腐蚀现状,提出了减缓腐蚀的有效技术方案。...
本实验研究了酸性蛋白酶的添加方式和添加量对醋醅酸度和氨基酸态氮含量的影响。结果表明:在醋酸发酵阶段添加15 U/g糯米的酸性蛋......
建立了以草酸钾-氯化镁为掩蔽剂、以滴定法测定高浓度硝酸铀酰溶液酸度的方法,考察了掩蔽剂用量、指示剂种类对测定结果的影响。结......
介绍了一种判断有机化合物酸性强弱的教学方法,将化合物共轭碱的稳定性作为化合物酸性强弱的判断标准,共轭碱越稳定,对应化合物酸......
在pH〉1、0〈pH≤1、pH〈0三种条件下,对P_（204）-煤油体系以及P_（204）-HCl-H_3AOH体系负载La有机相进行红外光谱测试,研究了酸度对P_（20......
以硅胶为载体，碱金属磷酸二氢盐MH2PO4（M=Li，Na，K）为原料，利用浸渍法制备了3种硅胶负载的含有不同碱金属阳离子的聚合磷酸盐催化剂MH2PO4......
通过分析韶冶水浸镉生产过程存在的问题,提出了改进的措施并阐述了实施这些措施后产生的效果.......
利用N2吸附法、IR酸性表征、XRD等手段研究了碱改性高岭土(CLS)的孔结构和酸性特征.从重油分子的裂化原理出发,设计了含有碱改性高......
分别制备酸性和孔体积不同的催化剂，并通过红外光谱、N2吸附和ACE评价等方法，考察B酸与L酸的调变以及催化剂孔体积的变化对焦炭选择......
分别采用氘代吡啶和三甲基膦为探针分子，利用高分辨固体核磁共振技术研究了HZSM-35分子筛与探针分子之间的相互作用以及分子筛的酸......
以催化裂化反应为基础,分析了B酸和L酸在裂化催化剂中的形成、分布、转化和作用机理.论述了稀土交换量、分子筛晶粒细化、酸性分布......
用铬酸钡间接原子吸收法测定水中的硫酸盐，发现稀释倍数、盐度、酸度等对其影响特别大，通过试验比较，总结出应对措施，解决了测定结果的......
本文采用吡啶吸附的傅立叶变换红外光谱法(Py-FTIR)对三类典型工业FCC催化剂基体的新鲜样品及其水热处理样品(模拟平衡态)进行了详......
利用N2吸附法、IR酸性表征、微型和小型反应器等手段研究了改性高岭土基质催化剂的性能特点.结果表明,高岭土经过热和化学改性后形......
利用1992-2005年邵武市的探空、降水量和酸雨资料,分析了邵武市不同气象条件对降水酸度、酸雨出现率的影响,结果表明:(1)闽西北是......
利用β沸石纳米簇和曲拉通TX-100分别作为骨架构筑前驱物和孔道导向剂，在酸性介质中通过（N°H＋）Cl-S＋组装机制合成了蠕虫状孔道排列......
