查询词典 catalytic

Catalytic amination of alcohols was systematically discussed and reviewed.

对醇的催化胺化反应进行了系统讨论和综述。

The progress in the catalytic amination of bifunctional alcohols to diamines or cyclic amines is reviewed in this paper.

以乙醇和哌嗪催化胺化合成N-乙基哌嗪的反应为模型，对分子间醇的催化胺化反应进行了研究。

The key technology of the catalytic amination process of fatty alcohols is the amination catalysts with high selectivity.

催化剂的关键性能是其选择性。

The methanol molecule has the best catalytic effect among the three molecules followed by the water and ammonia molecules.

其中甲醇的辅助效果最佳，其次为水和氨分子。

Waste minimization in ammonolysis process of O,O-dimethylphosphorochloridothioate;2. An Investigation on the Micelle-Catalytic Hydrolysis and Ammonolysis of Carboxylic Acid Esters;3. The final product is generated by ammonolysis of the compound under high pressure.

以4-溴-1，8-萘酐为原料，用2，4-二甲基苯胺在醋酸中与之反应得到N-2′，4′-二甲基苯基-4-溴-1，8-萘酰亚胺，然后将NDNA在高压下用氨水进行氨解得到最终产品。

Dimethylhexane-1,6-dimethyleurethane is the key material for preparation of 1,6-hexamethylene diisocyanate by non-phosgene route. Our work mainly focuses on the study of the catalytic performances of metal oxysalts and metal oxides for the ammonolysis of DMC to HDU-M. Experiment effect showed the ammonolysis was omposed by two steps, in which the first step was easier to occur than the second.

中文摘要六亚甲基-1，6-二氨基甲酸甲酯是非光气合成六亚甲基二异氰酸酯的关键原料，本文主要对金属含氧酸盐和金属氧化物这两类用于碳酸二甲酯胺解合成HDU-M 的催化剂进行了初步研究并优化了工艺条件。

He catalytic properties of TiO_2/SiO2 were closely related with the state oftitania, and the TiO_2 species in the form of amorphism was responsible for thesynthesis of MPO and DPO.

iO_2在载体表面的存在状态是影响负载型TiO_2/SiO2催化剂活性的关键因素，TiO_2以无定形单分子层高度分散在催化剂表面时，有助于目的产物的生成。

The catalytic effect of different modified molecular si eves were studied for synthesis amyl acetate, the results indicate that SO 2- 4 /FeZSM have go od catalysis activity to esterification .The effect of the ratio of reactants, the amoun t of the catalyst and the reaction time were also investigated.

考察不同改性分子筛催化合成乙酸戊酯的催化活性，结果表明：改性SO2 - 4/FeZSM对合成酯的催化作用较好，并讨论了以该催化剂催化酯化时原料配比、催化剂用量、反应时间等因素与酯化反应的关系。

The downshift of diffraction angle of XRD indicates some precious metals enter crystal lattice of LaMnO3, the crystal sizes of catalysts become larger after precious metal loading; BET and SEM results show sintering happened to catalysts after catalytic reaction.

XRD衍射角向低角度出现了少许偏移，显示负载在表面的贵金属部分进入钙钛矿LaMnO3的晶格结构中，使其晶粒增大；BET和SEM结果表明催化剂在反应后出现了轻微团聚现象。

In this paper a tube wall reactor has been studied for the catalytic oxidation of benzene to maleic anhydride.

以苯催化氧化制顺酐的反应为研究对象，对管壁式催化反应器进行了研究。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。