硅铝比

X射线衍射法测定分子筛硅铝比与结晶度

Determination of Crystallinity and Si-to-Al Ratio of Synthetic Molecular Sieve by X-Ray Diffraction

分子筛催化剂结晶度和硅铝比的X射线分析

Determination of crystallinity and sio_2 / al_2o_3 value of molecular sieves by X ray diffraction method

表征了不同硅铝比Hβ-沸石的酸性和结构特征。

The acidity and structure characters of H β - zeolites with different n ( SiO2 ): n ( Al2O3 ) were characterized .

酸处理改性会使Beta分子筛脱铝，硅铝比提高。

The Si / Al ratio of Beta zeolite was increased by the acid treatment .

不同骨架硅铝比Y分子筛热改性过程的固体NMR表征

Solid state NMR characterization of thermal modifications of zeolite Y with different framework si / al rations

分别具有硅铝比为18.44和4.24的脱铝Ω型分子筛所表现出的催化活性差异能揭示TA或TB酸位的不同贡献。

It will reveal the distinct contributions of both T_A and T_ B acid sites that the different catalytic activities of zeolite omega with Si / Al ratios 18.44 and 4.24 .

X射线衍射法测定高岭石合成的NaY分子筛物相组成、结晶度、晶胞参数及硅铝比研究

Study on determining composition , crystallinity , cell parameter and ratio of silicate to aluminium of Zeolite NaY treated from kaolinite by X-ray diffractometer

NH3-TPD测定的相应酸性中心数大约为2.55～0.45×10~（20）个/g，酸强度分布随硅铝比不同和水蒸气处理强度不同而变化。

Its acid strength distribution varies with different SiO_2 / Al_2O_3 ratio and steam treatment severity .

电子透射电镜及电子探针（TEM/EDX）结果显示高岭土较蒙脱土有较大的粒径和较小的硅铝比，TEM还显示出这些粘土是由片层粒子堆积而成。

The TEM / EDX data showed that the kaolinite has a larger particle size and a lower Si / Al ratio than montmorillonite . These clays were stacked by platelets .

用X射线衍射法测定分子筛催化剂的硅铝比（SiO2／Al2O3）是通过准确测定分子筛晶体的点阵常数来完成的。

The measurement of crystallinity and SiO_2 / Al_2O _3 value of molecular sieves by using X ray powder diffraction method depends on the determination of lattice constant of crystallite of molecular sieves .

基于以上认识，本文合成了硅铝比高于文献值的MCM-49分子筛。

Zeolite MCM-49 with higher SAR than that presented in the literature was synthesized based on the above finding .

丝光沸石（MOR）有较高的硅铝比，良好的热稳定性和耐酸性能，广泛用于工业过程中特别是烷基化和异构化反应。

Mordenite ( MOR ), with high Si / Al ratio , high hydrothermal stability and strong acidity , is widely used in the chemical industry , especially in alkylation and isomerization processes .

MFI分子筛膜中的silicalite-1分子筛膜具有高硅铝比、高疏水性的特点，在渗透蒸发分离乙醇/水混合液领域有很大的前景。

Silicalite-1 zeolite membranes as one kind of MFI zeolite membranes have shown wide foreground for ethanol / water pervaporation that requires high Si / Al ratio and high hydrophobic property .

目前，公认的经Li+交换后的低硅铝比分子筛Li-LSX，是PSA的最优吸附剂，但由于Li+交换困难，交换过程锂盐流失严重，造成生产成本高，难以工业化。

At present , the Li-LSX prepared by Li + exchange with the low Si-Al ratio zeolites is recognized the optimal PSA adsorbent , but because of the difficulty of Li + exchange , severe loss of lithium , it is difficult to industrialization under low production costs .

不同硅铝比的超稳Y沸石的酸性及其催化性能

Studies on acidity and catalytic performance of USY with different silica-alumina ratios

高硅铝比高岭土超声强化酸浸反应动力学研究

Kinetic investigation on acid-leaching reaction of high-sio_2 / al_2o_3 kaolin under ultrasound

不同硅铝比β沸石的物理化学性能研究

Studies on the physicochemical properties of β zeolites of various sio_2 / al_2o_3 ratios

我国斜发沸石、丝光沸石的阳离子类型和硅铝比

Types of cations and the sio_2 / al_2o_3 ratios of clinoptilolite and mordenite discovered in China

不同硅铝比的Beta/MCM-41复合分子筛的合成和性能

The Synthesis and Performance of Composite Molecular Sieves Beta / MCM-41 with Different Ratios of SiO_2 / Al_2O_3

同时，采用该法也制备了具有碱激活性的不同硅铝比粉体。

At the same time , the powders with different Si / Al molar ratios have also been prepared .

通过优化加料顺序、加料方式和制备条件，可以制备出理想孔结构的高硅铝比无定形硅铝干胶产品。

High Si / Al amorphous silica-alumina with satisfactory pore structure could be prepared via optimization the preparation condition .

以煤灰碱酸比与硅铝比的乘积作为动力用煤结渣指数的探讨

The Product of Base / Acid and Silica / Alumina of Ash in Steal Coal & An Index to Ash Slagging Tendency

考察了反应条件对不同硅铝比的分子筛制备的催化剂对碳五烯烃转化制丙烯和乙烯的活性和稳定性的影响。

Effects of different n ( SiO_2 ) ∶ n ( Al_2O_3 ) molecular sieves and reaction conditions on activity and stability of catalysts were studied .

该催化剂采用高硅铝比的ZRP5超稳分子筛为主活性组元，并引用了新型基质材料。

USY zeolite ZRP 5 with high Si / Al ratio has been taken as the active component of the catalyst and the new matrix material adopted .

水热焙烧方法是通过水热脱铝改变沸石的骨架硅铝比，从而使沸石结构稳定的方法。

The structure of zeolite is stabilized by hydrothermal baking ( i. e. hydrothermal dealumination ) to change the ratio of silica to alumina in the zeolite frame .

以沸石类多孔物质（硅铝比30～70mol比）为基材，通过吸附、交换抗菌金属离子制成抗菌剂。

The cellular material of zeolite with SiO 2 / Al 2O 3 mol ratio of 30 ~ 70 underwent adsorption and antibacterial ion exchange and yielded antibacterial agent .

考察了铈含量、不同硅铝比、不同铈源对催化剂还原性能的影响。

The results show that the cerium content , the cerium source and the radio of silica to aluminum oxide of zeolite have influenced the reduction properties of catalysts .

且随硅铝比的增大，气相产物中烯烃含量越高，液相产物中小分子烯烃、烷烃的收率增大，芳烃的收率显著下降。

And as the Si / Al ratio increases , the olefin products in gas and the small molecular products in liquid increase , but the yield of aromatics decrease significantly .

在160℃时，硅铝比为25的介孔硅铝分子筛催化剂上苯酚可以完全转化为单烷基苯酚。

The synthesized molecular sieve with a Si / Al molar ratio of 25 successfully catalyzed the alkylation of phenol with 1-octene at 160 ℃ in liquid phase to the monoalkyl-substituted product quantitatively .

实验结果还表明，这些沸石上正庚烷自由基裂解活性随沸石的硅铝比增加而降低，即裂解活性与沸石中Na~+含量有关。

The results also show that free radical cracking activities of these zeolites increase with the decrease of Si / Al ratios , i.e. the cracking activities are related to the sodium contents of the zeolites .