分馏

After methanol is taken out, the research octane number of C5 etherealization product is about 95. The alkene content is less than 35%, the sulfur content is less than 10μg/g and the aromatics content is less than 1%, it is a clean and high quality gasoline component with high octane number.

脱除甲醇后，裂解C5馏分选择性加氢后的醚化产物的研究法辛烷值为95左右，烯烃含量小于35%，硫含量小于10×10^(-6)，芳烃含量小于1%，是一种优质、清洁的高辛烷值汽油组分。

Ii is a process with low investment and great profit to use the C5 etherealization product as the blending component of gasoline with high octane number. The C5 fraction is cut from steam cracking and it's diolefins are saturated by selective hydrogenation.

裂解C5馏分选择性加氢饱和二烯烃后，醚化产物作为高辛烷值汽油调合组分是一条投资少、见效快的工艺路线。

Extractable fraction in n-hexane at 50℃,w/w

50℃条件下，在正庚烷中萃取馏分重量

with the hydroisomerization dewaxing process of shell company, apiⅱgroup and apiⅲgroup lube base oils were produced by taking vgo no.4 and dao from xinjiang karamay paraffin crude oil as raw materials after a series of lab tests and commercial trial production. the developed oils can meet the quality requirements of hviwh300 and vhvih90bs respectively. but all the haze points of the two products are about 16 ℃, and the floccus will appear in these oils with the time going by. the problem of haze point in high viscosity lube oil will still need to study continually.

采用壳牌公司以异构脱蜡催化剂为核心的全加氢工艺，对新疆克拉玛依石蜡基原油减四馏分油、轻脱油进行了实验室工艺研究，并经工业试生产，可以生产出apiⅱ、ⅲ类润滑油基础油，其主要产品性质可以分别满足中国石油hviwh300、vhvih90bs的质量要求，但这两种大粘度产品浊点达到16 ℃左右，室温下长期存储会出现絮状物，需要进一步研究解决。

These early observations have been supplemented with results from chemical fractionation.

这些早期的观察曾为化学馏分的结果所增补。

Euler's gamma function gives factorials for integers but has surprising values for fractions.

欧拉的Gamma函数给出阶乘为整数，但令人惊讶的价值观为馏分。

The gasolene, kerosene, and the gas oil fractions are purified to remove unwanted materials, mainly sulphur compounds.

汽油，煤油，和气体油馏分被提纯以去除不想要的物质，主要是硫化物。

3Glass capillary gas chromatography is used in the analysis of n-paraffin distribution of the diesel,and according to the results of the cold filter plugging point test ,it is conclude that the impressibility of DFI to fuel is not only connected with the alkyl side chain and the polarity group of medicine oneself ,but also the n -paraffin distribution of the diesel ,the component ,technology and directions for producing of fuel and so on.

该方法具有合成线路短、产率高、成本低的特点；(3)通过使用毛细管气相色谱法测定柴油中直链烷烃的组成与含量，及柴油冷滤点(Cold filter plugging point 简称CFPP)的测定得出结论，DFI 对柴油的感受性不仅与药剂本身的烷基侧链、极性基团有关，也与柴油的直链烷烃的含量、馏分组成、加工工艺等有关。

This split should be made by inserting the point of the knife under the hide with the lade turned up.

将刀尖插入皮下，用刀锋划开牛皮。第一步就要将原油分割成更易处理的馏分。

Mono /di hexyl methylnaphthalene could be obtained from β methylnaphthaleneand n bromohexane proceeding condensation catalyzed by anhydrous aluminium chloride.

裂解柴油、煤焦油洗油中富含甲基萘馏分。目前，我国对这些资源已进行了初步开发和利用，但其广度和深度还远远不够。

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。