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in the catalyst
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  在催化剂
     100% at a Mo content of 2.47 wt% in the catalyst.
     在催化剂中Mo含量达到 2 47wt%时 ,双氧水的得率可达到 10 0 % .
短句来源
     The Application of InTouch8.0 Software in the Catalyst Factory
     InTouch8.0在催化剂马蹄炉改造中的应用
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     Application of PlantWeb Digital Architecture in the Catalyst Plant
     Plant Web在催化剂厂的应用
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     Again passed to catalyst P/V atomic ratio determination, add differently promoters and the influence of promoters atom to the catalyst mainfested (VO)_2P_2O_7, we also the promoters' existence form in the catalyst, but also inspected the catalyst precursors to activated in the temperature and the time, the activation airspeed, the feed gas the oxygen content as well as the catalyst dry way and the increase carrier to the catalyst performance influence.
     再通过对催化剂P/V原子比的确定、不同助剂的添加以及助剂原子对催化剂主要活性相(VO)_2P_2O_7的影响,以及助剂原子在催化剂中的存在形式,考察了催化剂前驱体活化温度和时间、活化空速、原料气中氧气含量以及催化剂的干燥方式和添加载体和扩孔剂对催化剂性能的影响。
短句来源
     The Application of HollySys SmartPro System in the Catalyst Kaolin Unit
     HollySys SmartPro系统在催化剂全白土装置中的应用
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  “in the catalyst”译为未确定词的双语例句
     THE VALENCE STATE OF RARE EARTH METAL IONS IN THE CATALYST SYSTEM Ln(naph)_3-Al(i-C_4H_9) _3-Al_2(C_2H_5) _3Cl_3 FOR POLYMERIZATION OF ISOPRENE
     异戊二烯聚合催化体系Ln(naph)_3-Al(i-C_4H_9) _3-Al_2(C_2H_5) _3Cl_3中稀土金属离子的价态
短句来源
     The Study CH_4,CO_2 and O_2 to Syngas (Ⅴ):Thermal Wave Distribution in the Catalyst Bed
     CH_4、CO_2与O_2制合成气的研究(V)——催化剂床层的热波分布
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     Bulk copolymerization of butadiene (Bd) and isoprene (Ip) in the catalyst system of Nd(naph)3- Al(i-Bu)3-Al2Et3Cl3(Nd-Al-Cl) was studied.
     研究了丁二烯(Bd)和异戊二烯(Ip)在Nd(naph)_3-Al(i-Bu)_3-Al_2Et_3Cl_3(Nd-Al-Cl)催化体系中的本体共聚合反应。
短句来源
     The fitting Pt loading in the hydrophilic catalyst layer was(0.40±0.05)mg/cm2. The optimal content of Nafion in the catalyst layer was 30%.
     电极催化剂层Pt的适宜载量为(0.40±0.05)mg/cm2,Nafion的优化质量百分含量为30%。
短句来源
     When the content of Al was 1.5% in the catalyst,the yield of i-butane was 37%, and its selectivity reached 70% above.
     采用 w(Al)=1.5%的催化剂,异丁烷最高收率达37%,选择性达70%。
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  in the catalyst
An increase in palladium sulfide concentration in the catalyst leads to an increase in the reaction rate per 1 g of the catalyst but has only a slight effect on the specific reaction rate of hydrogenation calculated per 1 g of Pd.
      
The presence of a phase boundary in the catalyst is responsible for the V2O5 → V2O3 transition without the formation of intermediate structures.
      
In the presence of MoO3 and V2O5 in the catalyst, anatase particles underwent agglomeration as the temperature was increased.
      
The selectivity, activity, and mechanical strength of the composites depend on the calcination temperature and on the place of the hydriding step in the catalyst preparation procedure.
      
Two types of molybdenum-containing particles are stabilized in the catalyst in the course of nonoxidative methane conversion at 750°C.
      
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A method for the preparation of p-nitroacetophenone was developed on the principle of auto-oxidation of p-nitroethylbenzene. The product could be isolated in good quality by a process of simple freezing, Manganese acetate on calcium carbonate (1:10) was found to be the catalyst of choice. When a steady current of oxygen was bubbled through p-nitroethylbenzene at the rate of 0.55 ml. per minute for every gram of the mass, with stirring, at 140-145℃, and in the presence of catalyst equivalent to 0.005 to 0.01%...

A method for the preparation of p-nitroacetophenone was developed on the principle of auto-oxidation of p-nitroethylbenzene. The product could be isolated in good quality by a process of simple freezing, Manganese acetate on calcium carbonate (1:10) was found to be the catalyst of choice. When a steady current of oxygen was bubbled through p-nitroethylbenzene at the rate of 0.55 ml. per minute for every gram of the mass, with stirring, at 140-145℃, and in the presence of catalyst equivalent to 0.005 to 0.01% by weight of Mn~(++), p-nitroacetophenone content could be raised to a maximum of 62% within 18 to 30 hours. p-Nitrobenzoic acid and formic acid were also formed alongside with p-nitroacetophenone in an amount approximately 10% its weight, together with probably a trace of nitrophenols which was not identified. From 453 g. of p-nitroethylbenzene, after oxygenation and being chilled, the crude product separated and washed with a solution of sodium carbonate at 70-80℃ to remove p-nitrobenzoic acid, 153-161 g. of p-nitroacetophenone was obtained, m. p. 79-80℃. Unchanged p-nitroethylbenzene could be reclaimed from the mother liquor by fractionation. The role of calcium carbonate in the catalyst is, however, not only that of a neutral carrier. It was shown to exert an important moderating effect on the decomposition of the peroxide radical which was essential for the maintainance of auto-oxidation reaction chain. When manganese acetate alone was used as catalyst, the reaction was usually rapid at the onset but of short duration. "Besides, the reaction would then be very sensitive to the presence of even minute amounts of copper and iron salts which were both potent peroxide destroyers. The presence of calcium carbonate would bring to a check these deleterious effects, giving reaction liquor of light colour and high phenone content. An un-identified inhibitor was found to be formed and accumulated during the reaction.

發展了自对硝基乙苯經自动氧化以制取对硝基苯乙酮方法。产品可用冷冻法析出。最好的接触剂为附着于碳酸鈣上的醋酸錳(10:1).在攪拌下向对硝基乙苯中通氧,速度为每克每分鐘0.55ml.,温度140~145°C,接触剂用量相当于0.005~0.01%Mn~(++),在18至30小时內对硝基苯乙酮含量可达62%。接触剂中的碳酸鈣的作用,並非一單純的不活潑性載体。我們証明了:它具有延緩过氧化物分解的重要作用,而过氧化物的存在,对于自动氧化反应链锁的得以持续是必要的。它也能抵消可能存在于原料中的微量銅鹽和铁鹽对过氧化物的强力破坏作用,以得到酮含量高、色澤淺的产物。此外尚發現在反应过程中有一种未經証实的抑制物生成並积累。

The polymeri2ation of butadiene catalysed by the TiBr4-i-Bu3Al, TiBr4-Et3Al, and TiBr4-BuLi systems has been studied. In the catalyst system of TiBr4-i-Bu3Al with benzene as solvent there are two molar ratios of i-Bu3Al to TiBr4, which exhibit maximum catalytic activity. The gel content, molecular weight and cis-l,4-content of the soluble part of the polymer decrease with increase of the i-Bu3Al/TiBr4 ratio. The catalytic activity seems to be greater, when the monomer is first mixed with i-Bu3Al than first...

The polymeri2ation of butadiene catalysed by the TiBr4-i-Bu3Al, TiBr4-Et3Al, and TiBr4-BuLi systems has been studied. In the catalyst system of TiBr4-i-Bu3Al with benzene as solvent there are two molar ratios of i-Bu3Al to TiBr4, which exhibit maximum catalytic activity. The gel content, molecular weight and cis-l,4-content of the soluble part of the polymer decrease with increase of the i-Bu3Al/TiBr4 ratio. The catalytic activity seems to be greater, when the monomer is first mixed with i-Bu3Al than first with TiBr4. The maximum activity appears to move towards greater i-Bu3Al/TiBr4 ratio, when the polymerization temperature is lowered. If heptane is used as solvent, the rate of polymerization is reduced and only one catalyst ratio exhibits maximum activity. The gel content, molecular weight and cis-l,4-content of the soluble part of the polymer obtained all seem to be lower. If triethyl aluminium is used instead of triisobutyl aluminium, there are also two catalyst ratios exhibiting maximum activity. When the temperature of polymerization is lower, the catalytic activity of the Et3Al-TiBr4 system seems to be greater than that of the i-Bu3Al-TiBr4 system. The products obtained from both systems appear very alike. They consist of a large amount of gel and the cis-l,4-content of the soluble part of the polymer is below 70%. Catalysed by a new catalytic system-the BuLi-TiBr4 system, butadiene can be polymerized to a product containing the cis-1,4-form higher than 90%. Catalytic activity was observed for BuLi/TiBr4 with molar ratios of 1.5-2.5. The cis-l,4-content of the product becomes smaller, when the catalyst ratio is greater. The valence states of the titanium existing in the above three catalytic systems have been compared. When the metal alkyl to titanium tetrabromide ratio is lower than 2, the trivalent titanium increases with increase of catalyst ratio. When the catalyst ratio is higher than 2, the trivalent titanium decreases with increase of catalyst ratio in the BuLi/TiBr4 system, while in the other two systems the trivalent titanium still increases till 100%. It is interesting to note that the catalytic activity of the BuLi-TiBr4 system lies just between the range of catalyst ratios which possess higher content of trivalent titanium.

本工作研究了四溴化钛与三异丁基铝、三乙基铝或丁基锂组成的催化剂对丁二烯的聚合。结果指出,在三异丁基铝与四溴化钛的系统中以苯为溶剂,有两个铝钛比值呈现最大活性。随铝钛比增加,产物的凝胶及分子量下降,可溶部分顺式-1,4含量亦随之减少。聚合活性以单体先与铝混合较先与钛混合为高。聚合温度降低时最大活性向铝钛比大的区域移动。以庚烷代替苯作为溶剂时,聚合速度降低,仅有一个铝钛比呈现最大活性,产物分子量及凝胶均较低,可溶部分顺式-1,4含量亦较低。如以三乙基铝代替三异丁基铝,则仍有两个铝钛比值呈现最大活性。聚合温度较低时,三乙基铝与四溴化钴的催化活性较三异丁基铝为高。二个系统的大部分产物类似,凝胶较多,可溶部分顺式-1,4含量在70%以下。利用丁基锂与四溴化钛组合的催化系统聚合丁二烯,可得顺式-1,4含量达90%以上的产物。活性范围为锂钛克分子此1.5—2.5。顺式-1,4含量随锂钛比增大而降低。本工作还比较了上述三种催化系统生成低价钛的情况。结果指出,在金属烷基物与四溴化钛的克分子比小于2时,三价钛均随克分子比增大而增大,克分子比大于2时,丁基锂的还原能力随克分子比增加而减少。在其他二种系统中则低价钛继续增加。有意义的...

本工作研究了四溴化钛与三异丁基铝、三乙基铝或丁基锂组成的催化剂对丁二烯的聚合。结果指出,在三异丁基铝与四溴化钛的系统中以苯为溶剂,有两个铝钛比值呈现最大活性。随铝钛比增加,产物的凝胶及分子量下降,可溶部分顺式-1,4含量亦随之减少。聚合活性以单体先与铝混合较先与钛混合为高。聚合温度降低时最大活性向铝钛比大的区域移动。以庚烷代替苯作为溶剂时,聚合速度降低,仅有一个铝钛比呈现最大活性,产物分子量及凝胶均较低,可溶部分顺式-1,4含量亦较低。如以三乙基铝代替三异丁基铝,则仍有两个铝钛比值呈现最大活性。聚合温度较低时,三乙基铝与四溴化钴的催化活性较三异丁基铝为高。二个系统的大部分产物类似,凝胶较多,可溶部分顺式-1,4含量在70%以下。利用丁基锂与四溴化钛组合的催化系统聚合丁二烯,可得顺式-1,4含量达90%以上的产物。活性范围为锂钛克分子此1.5—2.5。顺式-1,4含量随锂钛比增大而降低。本工作还比较了上述三种催化系统生成低价钛的情况。结果指出,在金属烷基物与四溴化钛的克分子比小于2时,三价钛均随克分子比增大而增大,克分子比大于2时,丁基锂的还原能力随克分子比增加而减少。在其他二种系统中则低价钛继续增加。有意义的是丁基锂-四溴化钛系统中聚合活性正好在三价钛最高?

With LiH as additive and Mg/Mg3N2 as catalyst hexagonal boron nitride is transformed into the cubic form, pressure and temperature being maintained at 55-64 Kb and 1700-2100℃ respectively. The structure and related properties of crystals thus obtained are identified and tested. Microseopie examination of impurities, defects, growth centers and steps on crystal surfaces indicates that this cubic BN possesses the common features of crystals grown under ordinary conditions. The results of the synthesis which depends...

With LiH as additive and Mg/Mg3N2 as catalyst hexagonal boron nitride is transformed into the cubic form, pressure and temperature being maintained at 55-64 Kb and 1700-2100℃ respectively. The structure and related properties of crystals thus obtained are identified and tested. Microseopie examination of impurities, defects, growth centers and steps on crystal surfaces indicates that this cubic BN possesses the common features of crystals grown under ordinary conditions. The results of the synthesis which depends closely upon the P-T condition, catalyst composition and catalyst assembly are analysed and discussed. The remarkable effect of the presence of a small amount of LiH in the catalyst on the grain growth is particularly described. Cubic BN crystals larger than 1mm. have been obtained.

用Mg和Mg_3N_2作触媒,以LiH作添加剂,在55—64千巴及1700—2100℃的高温高压下,进行了由六方氮化硼到立方氮化硼的合成。对合成晶体作了结构与有关性能的鉴定和测试。晶体表面上杂质、缺陷、生长中心和台阶结构的显微观察表明,高温高压下合成的立方氮化硼晶体具有通常条件下晶体生长的一般特征。对密切依赖于温度、压力状况及触媒组装的合成结果进行了分析和讨论。文中特别报道了触媒中少量LiH的加入对提高晶体粒度和质量的显著效果,其中获得了1毫米以上的大颗粒立方氮化硼晶体。

 
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