Heteropolyacid相关论文
针对含钒酸浸液中钒的有效提取问题,研究了298 K时磷-硫-钒-水溶液酸性体系中钒的提取热力学分析过程.结果 表明,在P(Ⅴ)-V(Ⅴ)-H2......
...
A TaW Mixed Addenda Heteropolyacid with Excellent Acid Catalytic Activity and Proton-conducting Prop
Heteropolyacids(HPAs)are highly suitable to catalyze various types of organic reactions in homogeneous liquid phase,......
Biomass-derived Glycol diethers(glymes)had the potential to become a next generation bio-fuel component since its pr......
用杂多酸为催伦剂，以二甘醇为原料合成二氧六环。结果表明，用磷钨酸做催化剂，反应转化率为９９％，二氧六环的选择性为９６％。其适宜的工艺条件为：反......
...
Fabrication of Ordered Meso-macroporous HPW/TiO2 Catalyst for Efficient Heterogeneous Oxidative Desu
In order to reduce the emission of SOx in the environment, sulfur compounds must be removed efficiently from fuels. Thre......
High dispersion of heteropolyacid nanoparticles on hydrothermally Cs-modified three-dimensionally or
Heteropolyacid nanoparticles (NPs) were supported on Cs-modified three-dimensionally ordered macroporous(3DOM) SiO2 and ......
Production of biodiesel from yellow grease (waste cooking oil and waste animal fats) is fast emerging as a promising alt......
Tungstophosphoric heteropolyacid supported onto neutral alumina:characterization and synthesis of ac
Tungstophosphoric acid (HPW) catalyst supported on the neural alumina was studied. It was prepared by means of an equili......
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......
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......
Application of Heteropolyacids as Heterogeneous and Recyclable Catalysts for One-Pot Synthesis of 3-
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......
Keggin Heteropolyacid Catalyzed Synthesis of Isoxazolo[5,4-d]pyrimidine-4,6(5H,7H)-diones at Room Te
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......
An efficient and environmentally benign procedure for the catalytic esterification of salicylic acid with aliphatic alco......
Nano Silica with High Surface Area from Rice Husk as a Support for 12-Tungstophosphoric Acid:An Effi
Nano silica was prepared from rice husk with high surface area.X-ray diffraction (XRD) pattern showed that the amorphous......
Highly Efficient and Environmentally Friendly Preparation of14-Aryl-14H-dibenzo[a,j]xanthenes Cataly
A rapid and efficient procedure for the preparation of various aryl-14H-dibenzo[a.j]xanthenes was reported.The method de......
One-Pot Four-Component Dakin-West Synthesis of β-Acetamido Ketones Catalyzed by a Vanadium-Substitut
The multicomponent condensation of an aryl aldehyde,acetyl chloride,acetonitrile,and enolizable ketone as one-pot synthe......
Owing to their acidity,oxidizing ability and redox reversibility,molybdovanadophosphoric heteropolyacids(Hn+3PMo12-nVnO4......
Selective formation of pharmaceutical intermediates like diphenylmethane, dimethyldiphenylmethane, benzyl toluene and be......
采用溶胶凝胶法制备H3PW12O40-Ti(OH)4凝胶，并交联于由季铵盐预插层的有机膨润土层间，制备了H3PW12O40/TiO2/膨润土复合光催化剂。通......
Tungstophosphoric heteropolyacid supported onto neutral alumina:characterization and synthesis of ac
Tungstophosphoric acid (HPW) catalyst supported on the neural alumina was studied. It was prepared by means of an equili......
An efficient and environmentally benign procedure for the catalytic esterification of salicylic acid with aliphatic alco......
Chlorine atoms from chlorofluorocarbons (CFCs) deplete stratospheric ozone and CFCs are green-house gases too. Owing to ......
Nano Silica with High Surface Area from Rice Husk as a Support for 12-Tungstophosphoric Acid:An Effi
Nano silica was prepared from rice husk with high surface area.X-ray diffraction (XRD) pattern showed that the amorphous......
This paper presents a new system for the activity assay of arginine kinase (AK), based on the spectrophotometric determi......
Polyaniline doped with heteropolyacid was synthesized using solid-state synthesis method. XRD pattern showed that polya......
Poly(vinyl alcohol) (PVA) fiber mats containing 20 and 80 wt% H3PW12O40 were prepared by using electrospinning technique......
Bisphenols containing long aliphatic hydrocarbon side chains were synthesized by the condensation of phenol with aldehyd......
合成了一种二缺位Keggin型硅钨杂多酸催化剂，并以此催化（ Z，Z，Z）-3，6，9-十八碳三烯得到相应的单环氧化合物，并对反应溶剂，反应条件进行了优......
通过活性组分选择和载体改性设计催化剂,提高对甘油催化脱水反应的性能,同时研究反应条件对甘油转化率和丙烯醛选择率的影响规律。......
用自然沉降法组装成规则排列的聚苯乙烯胶晶,并以此作为模板剂,用Keggin结构的杂多酸SiW12 和正硅酸乙酯组成溶胶作为先驱物,成功......
采用溶胶凝胶法制备了一系列负载型杂多酸催化剂,考察这些催化剂对合成丙酸异戊酯的催化性能,并利用傅立叶红外、X射线衍射和N2吸......
<正> 迄今为止,有关钨钽杂多阴离子的报道极少。由于杂多酸在石油化工、颜料等领域有重要用途,人们对研究新的杂多阴离子的合成一......
试验了用杂多酸为催化剂，以二甘醇与乙二醇的混合物为原料制取二氧六环，得到了适宜的催化剂和工艺条件。......
以硅钨杂多酸为催化剂，以异戊醇和己酸为原料合成己酸异戊酯。探讨并找到了反应最佳条件为：醇酸物质的量比为1．6：1，反应时间为2h，催化剂......
根据所使用氧化剂的不同介绍杂多酸催化剂的应用方向；预测杂多酸催化剂氧化烷烃的研究方向。......
选用不同种类的固体杂多酸制备催化剂，考察其用于催化环戊烯合成戊二酸的性能。研究表明，在物质的量比4．4，反应温度85℃，反应时间6h，催化......
以超稳Y沸石、葫芦脲-6（（C6H6N4O2）6）和SiO2为载体，H2.25Cs0.7Cu0.25As0.1PMo11VO40（简记为PMo11VO40）杂多酸为活性组分，制备了3种负载型杂......
在-90℃下用X线单晶衍射法测定了标题化合物的晶体结构。晶体属P_(421)~c〔P4/mnc〕,α=12.540(2)〔12.515(3)〕,c=17.565(5)〔17.......
用XPS对杂多酸PMo_(12-x) V_x和PMo_(12-x) W_x的研究表明:在用V部分取代Mo时,虽然O1s峰没有给出什么有意义的结构信息,但OKL_(23)......
用负载型杂多酸为催化剂，N2O5为硝化剂的新型硝化体系，对甲苯的硝化反应进行研究。分别考察了杂多酸类型、载体种类、杂多酸负载量及......
为创建洁净高效的酚类化合物硝化工艺，以杂多酸H6PMo9V3O40（PMAV3）为活性组分，硅胶为载体，浸渍法制备了负载型催化剂PMAV3／SiO2，采用红外......
采用浸渍法和回流吸附法在γ-A12O3、NaX型分子筛、TiO2、SiO2和椰壳活性炭载体上制备7种负载型杂多酸催化剂，并对催化苯羟基化制苯......
报导了在乙醇-水体系中,分别用11-硅钨酸、12-硅钨酸与3,6-二(二甲氨基)-二苯并碘六环反应,制得一系列未见文献报导的大阳离子杂多......
用固载杂多酸PW12/C催化合成了香料环己酮乙二醇缩酮,研究了酮醇摩尔比、催化剂用量、反应时间,反应温度等因素对产品收率的影响.......
首次合成出两种未见文献报导的杂多化合物2[N(C_4H_9)_4]_2O·8MoO_3·1/2 V_2O_5·8SiO_2·6H_2O和1.15[N(C_4H_......
活性炭表面杂多酸的稳定性和酸性王新平，叶兴凯，吴越（中国科学院长春应用化学研究所，长春１３００２２）关键词活性炭，杂多酸，固载化，热稳定性，酸性杂多酸......
用十二烷基胺代替传统的季铵盐合成了中孔全硅分子筛ＨＭＳ，并将硅钨杂多酸浸渍固载在ＨＭＳ上，用ＸＲＤ，ＦＴ－ＩＲ以及ＮＨ３－ＴＰＤ等手段对ＨＭＳ及不同负载量的焙烧温度的负载论剂......
香化合物经Friedel-Crafts酰化反应制备药物和香料中间体芳香酮是近年来人们感兴趣的课题[1～4].用于该反应的传统催化剂是Lewis酸金......
