馏分

Removing naphthenic acid from distillate is an important process in refining crude oil.

从馏分油中脱除环烷酸是石油炼制的一个重要步骤。

Reaction temperature, reaction time and different distillate oil on the properties of petroleum sulfonate were studied.

本文以发烟硫酸和三氧化硫作为磺化剂，选用重烷基苯或石油馏分油，在不同的工艺条件下进行磺化反应，摸索了反应物配比、反应温度、反应时间和不同原料等条件对合成产物的性能影响，得出反应物配比是影响磺化收率的重要因素。

Some suggestions are presented to improve the performance of the feed system, distiller,fraction collector system and cooling system of the molecular distillation equipment.

在此基础上，对分子蒸馏设备的进料系统、蒸馏器、馏分收集系统和冷却系统的进一步改进提出了一些建议。

Finally, two short-path distillation processes and one falling film evaporator are applied in the regeneration of waste lubricating oil. In the test, the diesel oil, gasoline and lubricating oil are distilled respectively, while the gelatinoid materials, asphaltene and carbon residue remain in the draft. The regenerative lubricating oil accords with the standards of base oil. And the recovery efficiency is up to 75 percent. The technology used in the test doesnt comprise processes like pickling and alkali neutralization, which would cause secondary pollution like acid draff and sulfur dioxide and so on. As a result of this, our technology is friendly to the environment.

最后，利用一级薄膜蒸发和两级短程蒸馏工艺对废润滑油进行了再生回收工业应用试验，将柴油、汽油等轻油以及润滑油馏分分别蒸馏出来，而大部分胶质、沥青质、碳垢存在于残渣中，试验得到的再生润滑油符合基础油的标准，回收率达到75％，达到废润滑油再生的目的；同时再生过程中没有酸洗、碱中和等工序，不产生酸渣、二氧化硫等二次污染，是一种清洁环保的废润滑油再生工艺。

ASTM D1159-01 Standard Test Method for Bromine Numbers of Petroleum Distillates and Commercial Aliphatic Olefins by Electrometric Titration.

电化学滴定法测量石油馏分及商用脂族烯烃的溴值试验方法。

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。

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。