查询词典 catalysts
- 与 catalysts 相关的网络例句 [注:此内容来源于网络,仅供参考]
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This protocol could also be used for the selective reduction of the endocyclic double bond of the 3-electron withdrawing group substituted coumarins. This method is clean, mild, and efficient.2 ZrCl_4 / HEH was found to be a selective and efficient reagent combination for the direct reductive amination of electron rich aldehydes and ketones with weakly basic amines after scanning various catalysts such as InCl_3, BiCl_3, CF_3COOH and so on.
图一 1。我们用汉斯酯作为有机还原剂,乙醇为溶剂,实现了4-甲叉基噁嗯唑酮和吡唑酮环外双键的高选择性还原;此外,我们还将这一还原体系用于3-吸电子集团取代-3,4-二氢香豆素环内双键的选择性还原。
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They were used as solid catalysts in the esterification of phosphoric acid with equimolar lauryl alcohol to monoalkyl phosphate ester.
结果表明,采用L^1-Mn-SiW(L^1:双水杨醛缩-1,6-己二胺)催化剂,在优化的反应条件下,酯化反应可获得93%的MAP收率和高达98%的MAP选择性。
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Using ethyne as source gas, CNTs were successfully synthesized by CVD method. By comparing different synthesis technics, the influences of parameter to the grow of CNTs, such as catalysts, growth time, reaction temperature and ratio of all kinds of carrier gases were investigated. The results showed that the influence of carrier gas, reaction temperature, and the growth time on synthesis of CNTs was significant. In conclusion, a better condition for carbon nanotube growth was obtained. Through analyzing Raman Spectrum of samples, GM and SWNTs' characteristic peak-RBM was indicated.
采用乙炔为碳源、氢气和氩气为载气,利用气相催化热解法在AAO模板上成功的制备出了纳米碳管,用TEM,SEM,EDS,Raman等表征方法研究了生长温度、裂解时间、载气含量和不同催化剂对碳纳米管的石墨化程度、产物形态的影响,指出了单壁碳纳米管的特征振动模式—径向呼吸振动模以及拉伸振动模式G模,缺陷导致的D模,并采用蒸金后的样品进行了场发射的测试,得到了F-N曲线,与理论符合较好。
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In this paper, catalysts for hydrogenation of carbon dioxide to hydrocarbon, methanol and formic acid were introduced.
介绍了近年来二氧化碳催化加氢合成烃类、甲醇和甲酸过程使用的催化剂和助剂研究进展。
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Two skeleton nickel catalyst s A and B were prepared at 50 ℃ and 90 ℃ respectively and hydrogenation of furfuryl alcohol to tetrahydrofurfuryl alcohol was studied with the catalysts under different reaction conditions.
在中温和高温下制备了两种骨架镍催化剂 A和B,研究了不同的反应条件对两种骨架镍催化剂的影响,确定了最佳反应条件。
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To furfuryl alcohol, environmental-friendly non-chrome catalysts are taken as dominant aspect.
综述了糠醛加氢制备糠醇及2–甲基呋喃催化剂的近期研究进展。
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Five Co-B amorphous alloy catalysts were prepared by chemical reduction in different media, including pure water and pure ethanol as well as the mixture of ethanol and water with variable ethanol content. Their catalytic properties were evaluated using liquid phase furfural hydrogenation to furfuryl alcohol as the probe reaction.
采用化学还原法在不同介质中制备了5种Co-B非晶态合金催化剂,反应介质包括水、乙醇以及不同乙醇含量的乙醇-水混合溶液,并以液相糠醛加氢制备糠醇为探针反应考察了其催化性能。
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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。
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Supported noble metallic catalysts were prepared with different kind of noble metals and of supports,their catalytic performance for furoic acid hydrogenation were investigated in fixed bed micro-reactor in water under different conditions such as reaction pressure,temperature,H2 space velocity,space velocity of furoic acid and solvent and so on.
采用水作溶剂的固定床操作系统,用钌、铑、钯、铂等作为担载金属,氧化硅、活性炭、γ-三氧化二铝等作为载体,制备了多种负载型催化剂,评价了它们的糠酸选择性杂环加氢催化性能。
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The hydrogenation and methyl esterification of furoic acid over Pd/γ-Al2O3 catalysts was investigated in fixed bed micro-reactor by one-step method.
采用连续流动固定床微反应器,以糠酸、甲醇、氢气为原料,Pd/γ-Al2O3为催化剂,使糠酸一步加氢甲醋化生成α-四氢糠酸甲酯。
- 推荐网络例句
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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.
Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。
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I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.
我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。
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The shamrock is the symbol of Ireland and of St.
三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。