馏分

Raney nickel catalyst was used in hydrogenation of the turpentine and c-pinane,t-pinane,camphene and isocamphane and some other monoterpane s were determined.

用雷尼镍为催化剂对松节油进行了加氢实验，获得顺蒎烷、反蒎烷、莰烷、异莰烷等单萜烷类化合物，采用气相色谱"反吹、微流控"技术的色谱-质谱分析方法，测得了它们的保留时间和质谱图，为进一步研究原油或抽提物轻馏分中单萜烷类化合物的地球化学意义提供了一些基础性数据。

1 M packed with Mellapak SM-250 under vacuum in batch process to obtain fractions rich in such components as pinenes, camphene, limonene as well as p-cymene, terpenol s, respectively.

松轻油先用碱液进行预处理，再用工业SM-250型孔板波纹填料塔(300mm、高10.1m)，以真空间歇操作方式进行一次性精馏分离，分别得到富含蒎烯、莰烯、苧烯及对-伞花烃、萜烯醇等的馏分。

In the ESI+ mode the compound isolated from fraction III/9 showed a pseudo-molecular ion of m/z 261 ([M + 1]+) as well as sodium and potassium adducts with m/z 283 and m/z 299, respectively, thus suggesting a molecular mass of 260 Da.

在 ESI+模式下，从子馏分 III/9中提取出来的化合物分别出现了伪分子离子 m/z 261 ([M + 1]+)和纳钾加合物 m/z 283 and m/z 299，这样就暗示了260 Da 的分子质量。

Demands on middle-distillates selectivity have become increasingly severe; and a key problem to improve catalyst technology is how to achieve objectives for maximum middle-distillates selectivity To assess the catalytic performance of hydrocracking catalysts, a new laboratory method using decane as the model compound was develo...

本文首先建立了一种以正癸烷为模型化合物的微反评价方法，其中微反转化率与中型活性呈线性关系；采用回归方程可以拟合出中间馏分油选择性。

Gas chromatographic analysis for thermal dimerization mixture of pyrolytic C5 fraction was carried out by using capillary column.

用毛细管柱对裂解C5馏分二聚反应混合物进行了色谱分析。

Can be used in any type of middle distillate diesel fuel to improve engine performance.

可用于任何类型的中间馏分柴油燃料以提高发动机性能。

The product is made of superior petroleum distillate with scientific, reasonable and rigorous process.

本产品采用精选的石油馏分，经过科学合理的加工过程制造而成。

Distillate inventories now cover almost 49 days of supply against about 29 days at this time last year.

馏分油库存目前相当于将近49天的供应量，而上年同期只相当于大约29天的供应量。

Looking ahead, middle distillate and gasoline stocks stand at comfortable levels.

展望未来，中馏分成品油和汽油储备将处于令人满意的水平。

Stocks of distillate, including diesel, fell, but remain 30% above the five-year average.

包括柴油在内的馏分油库存量出现了下降，但仍比五年平均水平高出了30%。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。