查询词典 rare earth

Synthesis of cyclohexyl acetate with rare earth composite solid superacid catalyst of SO2-4/TiO2/Ce4+was investigated.

研究了以稀土复合固体超强酸SO42-/TiO2/Ce4+为催化剂合成乙酸环己酯的反应，在反应温度分别为100℃、110℃、120℃下，测出酯化反应的动力学参数，建立了动力学方程，并与无催化剂作用下合成乙酸环己酯反应的活化能及动力学方程进行了比较。

A new spheroidization process was developed for production of nodular cast iron from high-sulphur (0.1%S) molten iron. The solid slag cake of rare-earth oxide was used as desulphurizer and spheroidizer under the Ar-blowing operation.

采用稀土氧化物固态渣饼作为脱硫剂和球化剂，在吹氩条件下对高硫(S=0.100％)铁水进行球化处理生产球墨铸铁。

Metal industry: treatment equipment of Pell mina, deviling and pickling in wire stretching and steel rolling; deviling and pickling treatment before vehicle painting; the production of titanium oxide and rare earth elements and etc

金属工业：氧化铝膜处理设备；线材拉伸、钢铁轧制中除油及酸洗；车辆喷漆前除油及酸洗处理；氧化钛、稀土元素的生产等。

A series of mixed rare earth complexes of europium and lanthanum with o-aminobenzoate and 2,2-dipyridyl were synthesized by the reaction of EuCl3 and LaCl3 with o-aminobenzoate and 2,2' dipyridyl in solution.

用邻氨基苯甲酸和2，2'-联吡啶与氯化铕和氯化镧在溶液中反应，合成了混合稀土配合物。

Its products are suitable for many industries such as pottery and porc elain ware for toilet sanitary ceramics, household china pottery and porcelain for daily use, glass-ceramic, powder metallurgy, rare earth chemical, magnetic material honeycomb ceramics, electric porcelain bridge and tile as well as structural ceramics.

业务涉及建筑卫生陶瓷、日用陶瓷、微晶玻璃、粉末冶金、稀土化工、新型建材、电瓷、技术结构陶瓷等多个行业。

XPS measurements prove that the rare earth elements segregate to the surface and reduce the electrocatalysis of the alloy.

XPS分析表明，未处理的贮氢合金由于成分偏析使表面富集稀土元素，降低了表面的电催化能力。

On the whole, the electrocatalytic activity of traditional oxide coating doping with rare earth can be enhanced to a certain degree.

总的来说，稀土元素的掺杂对传统氧化物涂层的电催化性能有一定的改善。

To further extend the scope of this type Cannizzaro disproportionation reaction and the reactivity of enolate ligand in complex with aldehyde,we designed to synthesis new rare earth complexes containing arylamido and.enolate mixed ligands,studied their reactivity with aromatic aldehydes for the disproportionation reaction.

为了进一步探索这种歧化反应的应用范围及配合物中作为配体的乙烯醇基与醛的反应性，我们设计合成了含胺基、乙烯醇基混合配体的新型稀土配合物，并研究了其与芳香醛的反应。

Firstly,two novel rare earth complexes(CH_2=CHO)Ln~Ⅲ[2,6-_2PhNSiMe _3]_2Li_3Ln=Y(2,Yb(3)containing arylamido and enolate mixed ligands have been synthesized by treatment of 2 equiv of of 2,6-~iPr_2PhNHSiMe_3 with exces n-BuLi at -78℃in THF for 12h,followed by reaction with 1 equiv of LnCl_3at 80℃for 24h in one-pot.All the two compounds were characterized by spectroscopic methods,elemental analyses,and a single-crystal X-ray diffraction study.

首先，-78℃下，在两当量的2，6-~iPr_2PhNHSiMe_3(1)THF溶液中加入过量的n-BuLi，反应12小时，再加入一当量的LnCl_380℃下，反应24小时，一锅法合成了含胺基、乙烯醇基混合配体的新型稀土金属配合物(CH_2=CHO)Ln~Ⅲ[2，6-_2PhNSiMe_3]_2Li_3Ln=Y(2、Yb(3)，上述化合物结构经单晶X-ray衍射、光谱和元素分析表征，表明我们得到的是一类新型的三价稀土配合物。

Acetophenone cylic ethylic ketal was synthesized by using acetophenon e and glycol as reactants,and rare-earth solid superacid SO 2- 4-La 3 +/TiO 2 as c atalyst.Factors affecting the product yield were investigated.

以稀土固体超强酸SO2 -4-La3 +/TiO2 为催化剂，苯乙酮和乙二醇为原料催化合成苯乙酮环乙二缩酮，并考察了影响反应的因素。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。