查询词典 catalyst

In this thesis, We review the catalyst design methods, and the development of the hydrogenation of the nitroaroma...

简要综述了催化剂设计的基本方法，对芳香硝基化合物的还原作了简单的介绍。

Zeolite production capacity of 2,000 tons enterprises / year, hydrogenation catalyst 500 tons / year.

企业生产能力分子筛2000吨/年，加氢精制催化剂500吨/年。

Terephthalic acid ; hydrogenator ; stress corrosion cracking ; alkaline washing ; catalyst ; safety analysis

对苯二甲酸；加氢反应器；应力腐蚀开裂；碱洗；催化剂；安全分析

We have prepared Cu/SiO2 catalyst by impregnation method and researched their catalytic performance over the hydrogenolysis glycerol to 1,2-PDO.

取得的主要结果如下：采用浸渍法制备了具有不同铜负载量的Cu/SiO2催化剂并考察了催化剂的反应性能。

The ZnO/MCM-41 catalyst exhibits high activity for the hydrogenolysis of methyl benzoate to toluene or benzene.

该催化剂具有较高的苯甲酸甲酯氢解活性。

Adding Cr in the catalyst enhances the selectivity to benzaldehyde (from 85.6 to 91.2％ at 400℃). Cu or Ti is very beneficial for the hydrogenation of methyl benzoate to toluene or the hydrogenolysis of methyl benzoate.

Cr调变的催化剂提高了甲醛选择性(在400℃，从85.6提高到为91.2％)，Cu和Ti调变的催化剂则显示较高的苯甲酸甲酯深度加氢活性，即氢解活性。

Multi-hydrogen-groups on the catalyst make deep hydrogenation or hydrogenolysis take place. Adding promoters in the copper-substrate and zinc-substrate catalysts helps to formatting the multi-hydrogen-groups on the surface of them.

通过助催化剂的添加，在Cu基催化剂和Zn基催化剂上产生多氢吸附集团，可以改善催化剂深度加氢或氢解反应的性能，以有效地调控深度加氢反应。

Polystyrene-divinylbenzene is an important hydrophobic catalyst in gas-liquid exchange reactions to separate hydrogenous isotopes.

聚苯乙烯－二乙烯基苯是氢同位素分离技术中气－液交换反应重要的疏水催化剂载体。

The optimal conditions through testing of defoaming performance and foam suppressing performance are:reaction temperature at 100 ℃;for 10 h;the mass ratio of polyether to hydrogenous silicone oil is 15∶1 and the dosage of catalyst is 0.2%.

聚醚改性聚硅氧烷消泡剂是将聚醚和有机硅消泡剂两者的优点有机结合起来的一种新型高效消泡剂，由于其消泡效力强，且其耐热性、抗剪切性及耐酸碱盐性能好，加之还具有无毒无味、贮藏稳定及使用方便等优点，因而被广泛用在各种场合，特别是用于许多苛刻条件下的消泡，比如纺织品高温染色工艺、发酵工艺中的消泡[1]，但是此类消泡剂在我国还处于研制阶段，很

A novel application of hydrolase as catalyst for the addition of diethylzinc to aromatic aldehydes is reported. Optimum conditions were screened out.

报道了水解酶催化二乙基锌与芳香醛的加成反应，对反应条件进行了优化。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。