查询词典 hydrogenation

Hydrogenation of N=O group is easier than hydrogenolysis of the C-Cl bond on the hydrogenation of chloronitrobenzene .

氯代硝基苯中N=O极性键的加氢较C-Cl键的氢解容易进行，肉桂醛中C=O极性键较C=C键的加氢难。

The condensation reaction,in which the yield of intermediate product after refining process was more than 90%,used iso-butylaldehyde and formaldehyde as materials,Et 3N as catalyst.The hydrogenation,in which the conversion of hydroxypivaldehyde and selectivity of NPG were respectively 99% and 95%,used Cu-ZnO as catalyst,and ethanol as solute,meanwhile in the hydrogenation,the impurity in material could also ...

缩合反应采用异丁醛和甲醛为原料，三乙胺为催化剂，在 60℃左右反应，缩合产物经减压蒸馏和结晶、干燥，得到收率为 90 %以上的中间体羟基戊醛；加氢反应采用自制的Cu -ZnO催化剂，乙醇为溶剂，在 15 0℃将HPA加氢生成新戊二醇，HPA转化率为 99%，新戊二醇收率在 95 %以上，而且HPA缩合反应的副产物在加氢反应中也转化为新戊二醇。

The catalyst, palladium supported with chitosan condensated with salicylaldehyde, was studied in hydrogenation ofα-octene, nitrobenzene, 4-nitrophenol and m-dinitrobenzene, it was active and good selectivity forα-octene and nitrobenzene, when the activation time is 90 min, the catalyst showed the best hydrogenation active.

壳聚糖缩水杨醛负载不同比例PdCl_2的催化剂对α-辛烯、硝基苯、4-硝基酚和间二硝基苯的催化性能进行了研究，结果表明该催化剂活化90 min时加氢催化活性最好，对α-辛烯，硝基苯的催化选择性在催化5 h时达到了100%。

For further studied on nano-Ni catalytic hydrogenation of pyroole and its derivatives at normal temperature and pressure, we have did relevant catalytic hydrogenation experiments to pyrrole, pyrrolidine and pyrrolidone.

为进一步研究常温常压下吡咯及其衍生物的镍催化加氢反应，我们对试剂吡咯、吡咯烷和吡咯烷酮做了相应的催化加氢实验。

Asymmetric hydrogenation of quinoline derivatives is a hot topic in asymmetric hydrogenation. However, some problems still remained.

芳香杂环化合物喹啉衍生物的不对称氢化一直是不对称氢化领域的一个热点，然而对于苄基取代喹啉和一些多取代的喹啉衍生物至今没有实现有效的不对称氢化。

In this dissertation, Ir-catalyzed asymmetric hydrogenation, asymmetric transfer hydrogenation and asymmetric hydrosilylation of quinoline derivatives have been studied.

本论文研究了铱催化喹啉衍生物的不对称氢化、不对称转移氢化和不对称硅氢化反应。

The invention relates to a method for preparing arylamine compounds by the catalytic hydrogenation of arene nitro compounds in a H2O-CO2 system, wherein H2O-CO2 is taken as reaction medium, and the arylamine compounds are prepared by the selective hydrogenation of the arene nitro compounds at a low temperature(between 25 and 100 DEG C), and the catalytic process is controllable, highly efficient and green.

本发明涉及H 2 O-CO 2 体系中芳烃硝基化合物催化加氢制备芳胺类化合物的方法。以H 2 O-CO 2 为反应介质，由芳烃硝基化合物低温(25-100℃)选择性加氢制备芳胺类化合物的可控、高效、绿色催化过程。

The asymmetric hydrogenation of prochiral ketones is one of the most efficient methods of producing enantiomerically enriched secondary alcohols. The ruthenium complex RuCl_2[P(C_6H_5)_3]_2--DPEN(DPEN=1, 2-diphenylethylene-diamine) was applied to the asymmetric hydrogenation of benzalacetone.

具有光学活性的烯丙基醇是合成许多生理活性药物的重要中间体，前手性酮不对称加氢反应是制备具有光学活性仲醇的一种重要方法。

Amorphous alloys represent a variety of special materials with short-range ordering while long-range disordering structure which may provide pathways to the excellent catalytic properties, i.e., good anti-poisoning ability, the higher catalytic activity and selectivity in homogeneous hydrogenation of a,p-unsaturated aldehyde, the low and even none environment pollutionUp to now, in hydrogenation of furfural to furfuryl alcohol, the most commonly used catalysts are Cu-Cr dopant Cu-Cr, and Raney Ni et al.

目前，在糠醛催化加氢反应中所用的催化剂主要有Cu-Cr和修饰的Cu-Cr以及Raney Ni等，Cu-Cr催化剂毒性较高，对环境构成严重的危害，而且易阻塞反应器。

The results show that the catalyst has high activity for hydrogenation of edible oils,the activity of Cu-Zn-Zr for hydrogenation of edible oils is equal that of the imported catalyst such as American DM-Ⅱ and Japonic SN.

研究结果表明，Cu-Zn-Zr催化剂对大豆油加氢具有很高的活性，该催化剂的催化活性已达到美国DM-Ⅱ和日本SN进口产品的水平。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48