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    Results indicated that the purity is 94.67% with the yield up to 68%.
    由高效液相法测得纯度为94.67%,收率达到68%。
    2-chloro-5-methylpyridine was chloridized with sulfuryl chloride and initiated with azobisisobutyronitrile to produce 2-chloro-5-chloromethylpyridine, that has a yield up to 65.9%.
    以2-氯-5-甲基吡啶为起始原料,以硫酰氯为氯化剂、偶氮二异丁腈为引发剂制备2-氯-5-氯甲基吡啶。 反应收率65.9%。
    Two new azoxybisbenzocrown ethers were synthesized. Preparative method of azo-xybisbenzo-15-crown-5 has been improved with the yield up to 65.3%.
    合成了两种新的氧化偶氮双苯并冠醚,改进了氧化偶氮双苯并15-冠-5的制备方法,使其收率提高到65.3%。
    Isopropanol reacted with chloroacetic acid in the presence of PVC-FeCl3 to yield. isopropyl chloroacetate. Thus a mixture of 0.10 mol chlorcacetic acid, 0.25 mol (20ml) isopropanol, 15 ml cyclohexane and 2.5 g catalyst were heated for 2.5 h at refluxing temperature, with yield up to 80%.
    将聚氯乙烯-三氯化铁树酯首次作为催化剂用于氯乙酸和异丙醇的酯化反应中,当0.10mol氯乙酸,0.25mol异丙醇,15ml环己烷和2.5g催化剂一起回流分水2.5h,产品收率达80%。
    The results indi cate that the presence of vapor is favorable for catalyst to increase the ethylene selectivity . Ethylene in yield up to 52% is obtained under conditions of: V (C 2H 6)∶ V (O 2)∶ V (H 2O, g)= 1∶0 65∶3 8, GHSV=1600 h -1 , 740 ℃ with 10 mL catalyst.
    在催化剂装量 10 m L,V( C2 H6)∶ V( O2 )∶V( H2 O) =1∶ 0 .65∶ 3.8,GHSV=160 0 h-1,74 0℃时 ,乙烯收率仍可以稳定在 52 %以上 .
    A new method in which lactic acid was oxidized by liquid phase catalysis and selectively converted to pyruvic acid with yield up to 58. 2% was introduced.
    采用液相催化氧化乳酸,乳酸选择性地转化为丙酮酸的新方法,丙酮酸收率可达58.2%。
    After adopted procedure the yield up to 90% and cost reduce 20 yuan/mg.
    采用此工艺后收率提高到90%,成本下降20元/公斤。
    The optimum conditions are molar ratio of benzaldehyde to 1,2propanediol was 1:1.5, the quantity of catalyst was equal to 0.3% feed stock, and the reaction time was 1.0 h. TiSiW12O40/TiO2 was an excellent catalyst to synthesize benzaldehyde 1,2propanediol acetal with a optimal yield up to 90.0%. 
    实验表明:TiSiW12O40/TiO2是合成苯甲醛1,2-丙二醇缩醛的良好催化剂,在苯甲醛与1,2-丙二醇的摩尔比为1:1.5,催化剂用量为反应物料总质量的0.3%,环己烷为带水剂,反应时间1.0h的优化条件下,苯甲醛1,2-丙二醇缩醛的收率可达90.0%.
    Adipic acid in yield up to 75 0% was obtained in 6 h, in the presence of 8 hydroxyquinoline.
    8 羟基喹啉作助剂时 ,己二酸的收率最高 ,反应 6h ,己二酸的收率可达 75 0 % ;
    The optimal conditions obtained by the orthogonal design experiment for the esterification reaction with the yield up to 62% is that reaction time 55 min,reaction temperature 70℃,catalyst amount 110 g/L and reactants molar ratio of ethanol to acetic acid 1.5∶1.
    通过正交实验得到优化反应条件:反应时间为55 min,反应温度为70℃,催化剂用量为110 g/L,醇与酸摩尔比为1.5∶1,乙酸乙酯收率可达62%。
    Cu-Zn-Ti catalysts exhibited good catalytic activity in the hydrogenation of maleic anhydride toγ-butyrolactone with the yield up to 98%.
    Cu-Zn-Ti是优良的顺酐气相加氢催化剂,且γ-丁内酯收率最高可达到98%。
    The catalyst prepared through macroporous aminomethyl resin showed the most efficient in the catalytic oxidation of ethylbenzene with moderate yields (total yield up to 69.9 %, turnover number 55.3).
    其中,使用大孔氨甲基树脂为载体合成的催化剂能有效地催化乙苯氧化得到较好的转化率(总收率达69.9%,TON值达55.3)。
    Benzylamine could be obtained in mild condition by this method and the yield up to 84.1% was obtained. This method is a good method for industrial.
    以苄氯为原料,苯甲醛做副反应抑制剂合成苄胺,在温和条件下同样可达到高收率(84.1%),是一种具有工业化前景的方法。
    Two products were obtained with a high yield up 80% from raw materials after a series of unit reactions, such as bromizing, alkanisation, acidylation and esterification etc.
    本文以月桂醇、月桂酸、甲醇、乙二胺、氯乙酸等为原料,经过溴化、酯化、烷基化、酰基化、羧甲基化等单元反应合成了本论文的两种目标产物,最大收率都在80%以上。
    Suitablereflux ratio and quantities of additives were discussed and determined. Geraniolproduct was gained with purity above 90% and yield up to 86%, and nerol productwas gained with purity above 90% and yield up to 60%.
    确定了适宜的变回流比、络合剂用量等条件,获得了含量90%以上的单一产品,橙花醇产品的单程收率为 86%,香叶醇的收率为 60%。
    N,N-dimethylhydrazine is synthesised via the reactions of ammonia, hypochloride and dimethylamine, with the yield up to 87%, higher than the known reports in published articles , and the influential factors are discussed.
    研究了氨一次氯酸钠法合成偏二甲肼的反应,探索出本合成法的最佳反应条件,收率达87%。 对影响因素进行了初步讨论。
    Methylenedioxyphenyl)propanone2 (MDP2P) was synthesized. In one step, with high yield up to 70%, from isosafrole and performic acid. Product was analyzed by IR and MS.
    以异黄樟油素和过氧甲酸为原料 ,一步氧化合成 3,4亚甲二氧基苯基 2丙酮 ,收率可达 70 %以上 ,并用红外光谱法和质谱法对产品进行分析
    CC - 20D catalyst with high activity, good coke selectivity, high cracking capacity of heavy oil and high heavy metal resistance etc. was used on 500 kt/a FCCU of Yumen General Petrochemical Works. It could significantly increase the ratio of diesel to gasoline from 0.68 to 0.73 with diesel yield up to 38 % , RON of gasoline from 87 to 89 - 90. The unit could run smoothly.
    长岭炼油厂生产的CC-20D型催化剂具有活性高、焦炭选择性好、重油裂化能力、抗重金属污染能力强等特点,用于玉门炼油厂500 kt/a FCC装置后,大幅度提高了柴汽比,由原来的0.68提高到0.73,柴油收率最高可达38%,汽油的RON值由使用前的87提高到89~90,装置操作平稳,流化正常。
    By one-pass distillation operation under the condition described above,nerol and geraniol were gained with yield up to 65% and purity above 90%. The experimental results provided an important basis for technique innovation in factories,for the total cycle time is adoptable and the process is steady without thermal decomposition.
    实验结果显示,单塔精馏即可得到含量大于90%的橙花醇和香叶醇,收率在65%以上,提高20%无热分解现象,过程稳定,为工业生产奠定了基础。
    n-butyl acrylate was synthesized by the selected M_x~(2+)/resin catalyst with yield up to 97%.
    改进后的催化剂应用于丙烯酸正丁酯的合成,酯化收率达到97%以上.
 

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