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催化剂
相关语句
  catalyst 3824
     Results showed that the reaction temperature was 13℃ lower than that of the catalyst 3824 under same operating conditions, while the product distribution as well as properties were basically identical. The catalyst 3903 has good stability and excellent regenerability. It has teached the advanced level of foreign catalysts of the same type.
     在相同的工艺条件下,3903催化剂的反应温度比3824催化剂的低13℃,而产品分布和产品性质两者基本一致,3903催化剂的稳定性和再生性能良好,已达到国外同类型催化剂的先进水平.
短句来源
  “3824催化剂”译为未确定词的双语例句
     The 3903 high activity mid-barrel hydrocracking catalyst, as a substi- tute for 3824 catalyst, is one of the new generation hydrocracking catalysts developed by Fushun Research Institute of petroleum and petrochemicals during the seventh five-year plan period.
     高活性中油型加氢裂化催化剂3903(工业牌号)是抚顺石油化工研究院“七五”期间研制成功的新一代加氢裂化催化剂,是3824催化剂的替代产品。 3903催化剂含钨、镍金属和超稳Y型分子筛。
短句来源
     This paper summarizes the experimental results about activity and stability of 3903 catalyst and compares them with 3824 catalyst.
     本文总结了3903工业放大催化剂的活性及工业生产催化剂稳定性试验数据并与3824催化剂进行了对比。
短句来源
     The experiment results demonstrate that, under the same other operating conditions, the reaction temperature of 3903 catalyst is 13.5℃ lower than that of 3824 cata- lyst, while the product distribution and properties are about the same. Besides, the 3903 sta- bility of catalyst is superior. To sum up, the 3903 catalyst is a new-generation high activity mid-barrel hydrocracking catalyst with excellent adaptivity and flexibility for use.
     实验结果表明,在相同工艺条件下,3903催化剂反应温度比3824催化剂降低13.5℃,产品分布与产品性质与3824催化剂基本一致,稳定性良好,是一种适应性强、灵活性大的高活性中油型新型加氢裂化催化剂。
短句来源
  相似匹配句对
     The status of R & D on methanol synthesis catalyst was reviewed.
     ; 催化剂;
短句来源
     COMMERCIAL APPLICATION OF HC-K,3824,3823 CATALYSTS IN A HYDROCRACKER
     HC-K、3824、3823催化剂在工业加氢裂化装置上的应用
短句来源
     Commercial Application of Mid-distillate type 3824 Hydrocracking Catalyst
     3824中油型加氢裂化催化剂的工业应用
短句来源
     catalyst A340;
     催化剂催化 ;
短句来源
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p-Nitrobromobenzene was prepared from the sodium salt of α-p-Nitrophe-nyl-β-acetyl-hydrazine by bromination and subsequent addition of copper catalyst.Similary,α-p-nitrophenyl-pyridine was obtained by adding pyridine instead ofcopper catalyst.

(一)α-对硝基苯-β-乙醯肼钠盐溴化后,加进铜催化剂,即有放氮效应,产品为对硝基溴苯。(二)用吡啶代替铜催化剂,亦放出氮气,产品为α-对硝基苯吡啶.

Condensation of cinnamaldehyde with methyl crotonate in the presence of alcohol-flee potassium methoxide gives,after hydrolysis,p-phenyl-benzoic acid in low yield.Its structure has been ascertained by direct comparison with an au- thentic sample.

桂皮醛与α-丁烯酸甲酯在催化剂去醇的甲氧基钾影响下进行反应,得到低产率的对-苯基-苯甲酸,共结构经用已知方法所得同样的酸直接加以比较而确定。

4-Methyl-2,6-dichloropyrimidine was prepared by heating 4-methyl-uracil with phosphorous oxychloride in the presence of phosphorous pentachloride; and it boiled at 97° at 7 mm, at 102° at 10 mm, or at 113° at 13 mm. 4-Methyl-2,6- dichloropyrimidine reacted with sodium methoxide in anhydrous methyl alcohol, forming 4-methyl-2,6- dimethoxy-pyrimidine, which was isolated by ether extraction and pnrified by vacuum distillation. Pure 4-methyl-2,6-dimethoxy-pyrimidine boiled at 85-87° at 7 mm, or at 103° at 13 mm,...

4-Methyl-2,6-dichloropyrimidine was prepared by heating 4-methyl-uracil with phosphorous oxychloride in the presence of phosphorous pentachloride; and it boiled at 97° at 7 mm, at 102° at 10 mm, or at 113° at 13 mm. 4-Methyl-2,6- dichloropyrimidine reacted with sodium methoxide in anhydrous methyl alcohol, forming 4-methyl-2,6- dimethoxy-pyrimidine, which was isolated by ether extraction and pnrified by vacuum distillation. Pure 4-methyl-2,6-dimethoxy-pyrimidine boiled at 85-87° at 7 mm, or at 103° at 13 mm, and melted at 62-65°. It was recrystallized from petroleum ether, m.p. 65-66°. In the above reaction, there was isolated a white solid, suspending in the ethereal solution and being collected separately. This white solid, considered as a by-product, was dissolved in hot water and acidified with acetic acid, whereupon it separated in needles. After recrystallization from water, it melted at 201-202°. It was tentatively assigned to be 4-methyl-2-methoxy- uracil. Further, 2,6-dialkoxy-pyrimidines were prepared similarly as 4-methyl-2,6-dimethoxy- pyrimidine: 4-Methyl-2,6-dichloropyrimidine reacted with sodium ethylate in anhydrous ethyl alcohol, forming 4-methyl-2,6-diethoxy-pyrimidine, which boiled at 110°/11 ram. 4-Methyl- 2,6-dichloropyrimidine was treated with sodium n-propoxide in normal propyl alcohol, forming 4-methyl-2,6-di-n-propoxy-pyrimidine, which boiled at 120°/5 mm. 4-Methyl- 2,6-dichloropyrimidine reacted with sodium iso-propoxide in isopropyl alcohol, forming 4-methyl-2,6-di-isopropoxy-pyrimidine, which boiled at 103°/3 mm. The action of sodium n-butoxide in normal butyl alcohoI upon 4-methyl-2,6-dichloropyrimidnie gave 4-methyl- 2,6-di-n-butoxy-pyrimidine, which boiled at 147-148°/5 mm. The action of sodium isobutoxide in isobutyl alcohol upon 4-methyl-2,6-dichloropyrimidine gave 4-methyl-2,6- isobutoxy-pyrimidine, which boiled at 132-133°/6 mm. The action of sodium isopentoxide in isopentyl alcohol upon 4-methyl-2,6-dichloropyrimidine gave 4 methyl-2,6-di-isopentoxy- pyrimidine, which boiled at 145-146°/3 mm. 4-Methyl-2,6-dichloropyrimidine reacted with sodium benzoxide in benzyl alcohol, giving 4-methyl-2,6-dibenzoxy-pyrimidine, which boiled at 231°/6 mm. 4-Methyl-2,6-dimethoxy-pyrimidine was heated in a sealed tube at 330-350°, giving the completely rearranged isomeric compound, 1,3,4-trimethyl-uracil, which was purified by vacuum sublimation at 130° at 10 mm and then by recrystallization from 95% alcohol. The latter melted at 107-109°. Nevertheless, 4-methyl-2,6-dimethoxy-pyrimidine was dis- solved in methyl iodide, and kept at room temperature in the dark with occasional shaking; whereupon the partially rearranged product, 2-oxy-3,4-dimethyl-6-methoxy-pyrimidine, gradually separated out. After recrystallization from absolutealcohol, it melted at 134-135.5°. Its structure was established as follows: Pure 2-oxy-3,4-dimethyl-6-methoxy-pyrimidine was heated with dilute hydrochloric acid for one hour; whereupon 3,4-dimethyl-uracil, m.p. 220-221°, separated out. This partially rearranged product, 2-oxy-3,4-dimethyl-6-methoxy- pyrimidine was heated at 335-350° and was again transformed into its stable and completely rearranged modification, 1,3,4-trimethyl-uracil, which was purified by vacuum sublimation and then recrystallization from 95% alcohol. The latter melted at 109-110°.

(1)4-甲基-2,6-二氯代嘧啶與鈉醇和醇的溶液作用,可以形成相應的2,6-二烴氧基嘧啶。 (2)4-甲基-2,6-二甲氧基嘧啶加熱至高温度即可轉變成其穩定結構的異構體1,3,4-三甲基-2,6-二羥基嘧啶。另一方面,在碘代甲烷催化劑的影響下,部份轉變成2-氧代-3,4-二甲基-6-甲氧基嘧啶;此化合物加熱卽可發生完全的轉變作用而形成其異構體1,3,4-三甲基-2,6-二羥基嘧啶。

 
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