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zr
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    Study on Membrane Catalysis in Esterification Reaction by Zr(Ⅳ)/PVA Functional Membrane
    Zr(Ⅳ)/PVA功能膜的膜催化酯化反应研究
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    Mo-MCM- 41 molecular sieve was prepared by hydrothermal synthesis method, and BO3-3/ZrO2/Mo-MCM- 41 molecular sieve was prepared by impregnating Mo-MCM- 41 successively with H3BO3 and Zr(SO4)2 solutions.
    采用水热合成法制得BO33-/ZrO2/Mo-MCM-41中孔分子筛。
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    Two types of Ce0.67 Zr0.33 O0.2 solid solutions were prepared by hydrothermal method from different precursors, and their textural and redox properties were investigated by means of XRD, BET, and TPR.
    采用两种不同前驱体通过水热法合成了Ce0.67 Zr0.33 O0.2固溶体,并通过XRD,BET,TPR等手段考察了样品的相结构,比表面及还原特性。 结果表明,在180℃,12 h的水热条件下,以共沉淀产物为前驱体所制得的Ce0.67 Zr0.33 O0.2固溶体比表面积较高,但存在一定程度的相分离;
    The XRD results showed that Zr-MSU-V and Nd-MSU-V materials retained good crystallinity even when the molar ratios of Si to Zr and Si to Nd were up to 5 and 20, respectively.
    XRD结果表明,即使当Si/Zr或Si/Nd的摩尔比达到5或20时,获得的两种分子筛Zr-MSU-V和Nd-MSU-V均能保持良好的结晶度.TEM图清楚地展示了Zr-MSU-V具有有序的层状结构;
    CHARACTERIZATION OF Cu/Zn/Al/Zr CATALYSTS FOR DIRECT SYNTHESIS OF ESTER FROM ALCOHOL
    醇脱氢制酯Cu/Zn/Al/Zr催化剂的表征
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  zr
Lead zirconium titanate (PZT) films (Zr/Ti=45:55) with a high dielectric constant are prepared successfully on the low-resistance Si substrate in sol-gel dip-coating process with PT film used as the buffer layer.
      
The solid acids were prepared by mounting H2SO4 on TiO2 · nH2O and Zr(OH)4, respectively, followed by calcining at 823K.
      
To deal with this contradictory situation, insolvable zirconium tricarboxybutylphosphonate (Zr(PBTC)) powder was employed to make a composite with SPEEK polymer in an attempt to improve temperature tolerance of the membranes.
      
SPEEK/Zr(PBTC) composite membranes were obtained by casting a homogeneous mixture of Zr(PBTC) and SPEEK in N,N-dimethylacetamide on a glass plate and then evaporating the solvent at 60°C.
      
Results showed significant improvement not only in temperature tolerance, but also in methanol resistance of the SPEEK/Zr(PBTC) composite membranes.
      
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The retention of RuNO complexes in irradiated solvent is quite large for 30% TBP-kerosene, if they are per-equilibrated with l mol/L HNO3. The irradiated TBP-kerosene is treated by Bebker's method, and Na2CO3 extract, H2O extract and neutral organic phase are collected,respectively. The ruthenium retention is small in H2O extract phase which could extract and retain 95Zr strongly. But the ruthenium retention in neutral phase is large. The experiments indicate that the compounds which retain Ru could be...

The retention of RuNO complexes in irradiated solvent is quite large for 30% TBP-kerosene, if they are per-equilibrated with l mol/L HNO3. The irradiated TBP-kerosene is treated by Bebker's method, and Na2CO3 extract, H2O extract and neutral organic phase are collected,respectively. The ruthenium retention is small in H2O extract phase which could extract and retain 95Zr strongly. But the ruthenium retention in neutral phase is large. The experiments indicate that the compounds which retain Ru could be the degradation products of kerosene instead of TBP. The Ru retention in 30% TBP-kerosene-laurohy-droxamic acid is obvious. And it increases with the concentration of hydroxamic acid, aging temperature ,and time of loaded organic phase. According to the preceding experimental results, it is considered to use the water-soluble short chain hydroxamic acid as complexing agent for decreasing the ruthenium distribution coefficient (DRu) with TBP-kerosene.

HNO_3预平衡的30%TBP-煤油经γ辐照后对RuNO络合物有严重的保留作用,即不易用酸碱洗涤去除。将辐照溶剂分为减萃相、水萃相和中性相,实验证明对Ru有保留作用的是中性相,而不是水萃相。进一步实验表明,造成辐照溶剂中Ru保留的主要原因是稀释剂的辐解产物。30%TBP-+=碳异羟肟酸-煤油对Ru有明显的保留作用。另外,利用RuNO与异羟肟酸的络合作用,在低酸条件下,以水溶性的低碳异羟肟酸保温预处理,改变RuNO络合物的化学状态,可使30%TBP-煤油萃取RuNO硝酸根络合物的分配系数D_(Ru)降低一个数量级。

ZR unsaturated polyester resin used as a glassfiber sizing film former has been studied and synthesised. The study indicates the water affinity of unsatu-ratad polyester resin is more evident with the increase of pH value in the water solution of the resin.Using suitable emulsifying agent and equipment to turn water solution of the resin into emulsion liquid. Introducing ether bonds to the main bonds of the resin can increase the resin affinity for water. The resin modified with glycoll-amine can also...

ZR unsaturated polyester resin used as a glassfiber sizing film former has been studied and synthesised. The study indicates the water affinity of unsatu-ratad polyester resin is more evident with the increase of pH value in the water solution of the resin.Using suitable emulsifying agent and equipment to turn water solution of the resin into emulsion liquid. Introducing ether bonds to the main bonds of the resin can increase the resin affinity for water. The resin modified with glycoll-amine can also increase the affinity for water. Based on the above-mentioned study, ZR self-emulsified resin has been synthesised. It is a ideal water soluble unsaturated polyester resin.

本文研究并合成了用作玻璃纤维浸润剂成膜组分的不饱和聚酯树脂ZR。研究表明,随着树脂水溶液pH值的增大,不饱和聚酯的亲水性提高;采用合适的乳化剂和乳化设备,可使树脂水溶液形成乳化液;在树脂主链中引入醚键,可提高树脂的亲水性;用二乙醇胺改性树脂,亦可提高亲水性。在上述研究的基础上,合成了自乳化的ZR树脂,它是一种理想的水溶性不饱和聚酯树脂。

The conversion of syngas to mixed alcohols has been studied with Co-Cu based catalysts supported on La-Zr oxides,modified by the MoOx promoter. The presence of MoOx improves both activity and selectivity of a Co/ CuLZ catalyst greatly. For example, a productivity of 147 g alcohols/ Kg cat/h with 33 wt% of higher alcohols and a total selectivity of 53% to alcohols were obtained. TPR experiments indicated clearly that a strong interaction between Cu and Co or between Co, Cu and Mo is necessary for the improvements...

The conversion of syngas to mixed alcohols has been studied with Co-Cu based catalysts supported on La-Zr oxides,modified by the MoOx promoter. The presence of MoOx improves both activity and selectivity of a Co/ CuLZ catalyst greatly. For example, a productivity of 147 g alcohols/ Kg cat/h with 33 wt% of higher alcohols and a total selectivity of 53% to alcohols were obtained. TPR experiments indicated clearly that a strong interaction between Cu and Co or between Co, Cu and Mo is necessary for the improvements of activity and selectivity. Probe molecule experiments(C2H4 added into the syngas ) showed that both monometallic Co and Cu systems possess only slight CO insertion ability into the metal-alkyl group, whereas a synergetic effect between Co and Cu improves their CO insertion ability.Addition of MoOx confirms that a good synergy between Co, Cu and Mo is significant. Another effect of the MoOx promoter is to increase their hydrogenation activity.

在铜钴基催化剂体系上,由合成气制备混合醇的反应在6.0MPa的条件下进行.双活性组分体系中铜和钴是以强相互作用状态而共存的,分子探针实验表明,铜和钴的并存对于确保醇的碳链增长是重要的,助剂MoO_x的加入显著提高了La_2Zr_2O_7担载的铜钴基催化剂Co/CuLZ的活性和选择性,其作用主要表现为通过氢的可逆溢流效应而改善了体系的氢化性能,和增大了CO的插入反应能力。在改良催化剂体系上,获得了53%的醇选择性和147g/Kgcat/h的混合醇产率,内含33%的高级醇。

 
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