馏分

The low-molecular-weight paraffins and olefins, as found in natural gas and refinery gases, and the simple aromatic hydrocarbons have so far been of the most interest because it is these individual species that can readily be isolated and dealt with.

大量化合物都有望得到、其中许多化合物正在生产。目前我们正在探索如何从石油的重质馏分中提炼数量可观的产品。

Petroleum as it is found in the earth is a combination of several fractions.

地下发现的石油是由几种馏分组成的混合物。

Each of the fractions is still a mixture of many different compounds.

每一种馏分仍然是许多不同化合物的混合物。

All of the other fractions showed only very low activity or were inactive.

其它所有的馏分只有很低的活性或不具活性。

Hydrogenation of anthracene oil projects take the sets of coal tar distillate hydrogenation technology and mature technology of Shanghai shengbang Petroleum Chemical Technology Co., Ltd.

蒽油加氢项目采用上海胜帮石油化工技术有限公司的成套煤焦油馏分加氢工艺和成熟的技术。

Anthracene oil, anthracene paste, distn.

蒽油，蒽糊，蒽馏分

Anthracene oil, anthracene

3蒽油，蒽糊，蒽馏分

The results showed that main properties of base oil met the requirements.

结果表明，窄馏分油的主要性能指标达到使用要求。

In order to decrease copolymerization loss of isoprene during thermal dimerization of cyclopentadiene in C5-fraction,the effect of three inhibitors,diethylhydroxylamine,p-tert-butylcatechol and o-nitrophenol,on dienes' polymerization in the process was investigated by experiment with sealed glasstube.

为减少C5馏分环戊二烯热二聚过程中异戊二烯的聚合损失，采用封管实验方法考察了添加阻聚剂二乙基羟胺、对叔丁基邻苯二酚、邻硝基苯酚对热二聚过程中各二烯烃组分聚合程度的影响。

Results showed that the high content of TFs could be obtained by collection the fractions of special zones of column chromatography when crude TFs used as raw material, NAK as adsorbent and the elutes were concentrated by vacuum evaporator and freeze-dried.

结果表明：以茶黄素粗品为原料，NKA为柱填充料，收集解吸液一定区段的馏分，真空浓缩、冷冻干燥，即可制得高含量茶黄素制品，得率为48.04％，茶黄素总量大于15％。

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。