查询词典 ethane

Ethane＞ toluene＞1, 3, 5-trimethylbenzene＞methyl isobutyl ketone＞1, 4-Dioxane＞isoprene＞ 1, 2, 4-trimethylbenzene＞cyclohexane＞1, 3-Butadiene＞methyl butyl ketone were the most reactive VOC species in PRD.

化学活性排名前十位的化合物为：乙烯＞甲苯＞1，3，5-三甲苯＞甲基异丁基酮＞1，4-环氧乙烷＞异戊二烯＞1，2，4-三甲苯＞环己烷＞1，3-丁二烯＞甲基丁基酮。

Objective］ The research aimed to improve the comprehensive surface performance of lauryl polyoxyethylene ether (AEO3) by means of modification.［Method］ AEO3 was synthesized from lauryl alcohol and epoxy ethane, which reacted with liquid chloroacetic acid to produce modified AEC.

［目的］对月桂醇聚氧乙烯醚（AEO3）进行改性来提高它的综合表面性能［方法］用月桂醇、环氧乙烷合成月桂醇聚氧乙烯醚（AEO3），再用AEO3与液体氯乙酸反应改性合成AEC。

Lauryl alcohol;Epoxy ethane; Modification; Surface modification

江西省新余高等专科学校，江西新余 338000 月桂醇；环氧乙烷；改性；表面活性

The bulk of these upward revisions occurs in North America and reflects increased demand for liquids, LPG and ethane, due to heating and industrial use and increased petrochemical demand. Baseline 2001 revisions due to resubmissions of annual data from OECD Member countries carry forward into succeeding periods, raising 2003 and 2004 demand accordingly.

需求量上调的地区主要是北美，原因是取暖用油和工业用油以及石化工业对于液化天然气、液化石油气以及乙烷的需求都上调了。2001需求数据修正的另一部分原因是经合组织成员国修正了各自国内的年度数据，我们也据此相应提高了2003年和2004年的数据。

The flame retardant asphalts were prepared with Liaohe AH-70 type high-quality paving asphalt as feedstock,decabromo-diphenyl oxide,decabromo-diphenyl ethane,antimonous oxide et al as flame retardants,aluminum hydroxide as smoke inhibitor and drawing off oil high in aromatics as dispersion medium under the condition of heating and mixing.

以辽河AH-70高等级道路沥青为原料，十溴联苯醚、十溴联苯乙烷、三氧化二锑等为阻燃剂，氢氧化铝为抑烟剂，富含芳烃的抽出油为调和剂，在加热搅拌的条件下，制得了阻燃沥青。

The optimum conditions for this reaction were confirmed: the mole ratios of the Lewis base and AlCl〓 with the electron-rich aromatic monomer are 1. 2 and 3. 4, respectively; 1, 2-dichloride ethane is the most suitable solvent in this reaction; The solution of the two reactants must be added slowly to a large amount of solvent containing catalyst under pseudo-high dilution conditions; The Lewis base, such as NMP, DMF are applicable in this reaction system.

在此理论的指导下，通过对单体结构的模拟，高选择性地合成了一种新型结构的芳香环状聚硫酯二聚体，对其结构进行了精确的表征，在不同溶剂中得到了该环状二聚体的单晶，单晶X-ray衍射表明该二聚体为环张力极小的大环化合物。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。