查询词典 hydrogenation

The experiment results show that the yield of hexane catalyzed by the nano-fibrous catalyst was 4.7 times higher than that of PdCl_2/γ-Al_2O_3 catalyst. The hydrogenation ofα-tetradecylene, cyclohexene, nitrobenzol and styrene by the nano-fibrous catalyst was also studied, the selectivity to primary products of the hydrogenation of cyclohexene, nitrobenzol and styrene was 100%.

苯乙烯-丙烯腈共聚物负载纳米钯超细纤维形态催化剂在常温，氢气压力101.3Pa下催化α-己烯加氢时表现出很高的活性，催化剂PSAN-Pd10催化氢化α-己烯选择生成正己烷的产率在150 min就达到87%以上，与无机物负载的催化剂相比，加氢效果有显著提高，并且催化剂的重复使用性较好。

Along with the wide application of hydrogenation technology in the oil refining industry, the processes of heating, boiling and condensation of the petroleum products are in the conditions of having a lot of noncondensable gas in the hydrogenation heat exchanger and furnaces.

随着加氢工艺在炼油工业中的广泛应用，加氢换热器和加热炉中石油的加热、沸腾和冷凝过程都是在有大量不凝气体存在的情况下进行，但目前关于含不凝气体的石油产品的换热研究进行得很少。

In an embodiment, the selective hydrogenation catalysts of this disclosure are used in the hydrogenation of highly unsaturated hydrocarbons such as for example and without limitation acetylene, methylacetylene, propadiene or combinations thereof.

在实施方案中，本公开的选择性加氢催化剂被用于高度不饱和烃的加氢中，其中所述高度不饱和烃例如但不限于乙炔、甲基乙炔、丙二烯或它们的组合。

The effect of ion exchange of Y-MCM-41 on the hydrogenation activity of Pd-Pt/Y-MCM-41 in tetralin hydrogenation reaction was examined wit...

结果表明，采用不同离子交换处理的载体所制备的催化剂，其金属的负载量、金属与载体间的相互作用存在差别，从而影响催化剂的加氢活性和选择性。

Experimental results showed that the hydrogenation degree can be enhanced significantly by the addition of triphenylphosphine. When the molar ratio of TPP, TPPTS and Ru is 2:5:1, 89% hydrogenation degree can be achieved after 12 h under reaction conditions of 5.0 MPa and 150~C.

考察了溶剂种类、水溶液的pH值、添加助剂三乙胺、水／有机两相体积、底物浓度等对对-氯硝基苯转化率和生成对-氯苯胺选择性的影响，并在90℃、4.0MPa、反应时间为6h的条件下，进行了催化剂的循环实验。

The surface and the cross-section of the alloy films before and after hydrogenation were observed by scanning electron microscope and atomic force microscope, which showed that the lower reflection observed in the dehydrogenated film is due to the rough surface originating from the first hydrogenation.

利用扫描电子显微镜和原子力显微镜观察了吸放氢前后薄膜的表面及剖面形貌。

The fatigue propagation of surface cracks on overlay of hydrogenation reactor is seriously imperiling the safe run of hydrogenation reactor. It is attracted attention of engineering fields that a surface crack on overlay is able to either stop at the interface of overlay and base material or growth to base material under fatigue load.

热壁加氢反应器堆焊层表面裂纹的扩展严重威胁设备的安全运行，在疲劳载荷作用下堆焊层表面裂纹是否能穿过堆焊层与基体的交界面而向基体扩展的问题，受到工程界的高度关注。

Hydrogenation of anthracene oil projects take the sets of coal tar distillate hydrogenation technology and mature technology of Shanghai shengbang Petroleum Chemical Technology Co., Ltd.

蒽油加氢项目采用上海胜帮石油化工技术有限公司的成套煤焦油馏分加氢工艺和成熟的技术。

IV . Content and Capacity: 2,400,000t/a stamping coke, 30,0000 t/a coal tar, 10,0000 t/a methanol, 10,0000 t/a phenol anhydride, 5,0000 t/a Needle coke, 10,0000 t/a Hydrogenation of anthracene oil, 10,0000 t/a Hydrogenation of Crude benzene, 2,0000t/a β-naphthol, 1,0000t/a 2-hydroxy-3-naphthaoic acid , 2,0000t/a UHP ultra-high power electrode.

四、项目建设内容及规模：240万吨/年捣固焦炉及化产回收、30万吨/年焦油、10万吨/年甲醇、10万吨/年苯酐、5万吨/年针状焦、10万吨/年蒽油加氢、10万吨/年粗笨加氢、2万吨/年二萘酚、1万吨/年2.3酸、2万吨/年 UHP 超高功率电极。

We have synthesized 4,4'-dinitro-3 4''-dimethyl triphenylamine,(1), in 84% yield in an one-step condensation process between 3,4-dimethyl aniline and 4-fluoro-nitrobenzene. After the auto-oxidation of (1) and the subsequent hydrogenation of the nitro-groups, an AB2 type triphenylamine polyimide intermediate bearing two amine groups and one acid-anhydride group each on individual phenyl ring,{AB2 PI Intermediate}, was prepared successfully. The yields of the autoxidation and the hydrogenation steps are 81% and 90% respectively.

中文摘要本研究以3，4-二甲苯胺及4-氟硝基苯为原料，经一步骤缩合反应得到产率为84 %之4，4'-二硝基-3&，4&-二甲基三苯胺(1)，由(1)经自氧化法后再以氢化法还原硝基，成功地制备出带有二胺基与一羧基的三官能基之AB2型三苯胺中间体(AB2型PI中间体)，自氧化反应与氢化法的产率各为81%及90%。

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