馏分

The technology is suitable for various oil distillates, and under the optimal conditions, acidify of diesel and flashing oil produced by this technology is less than 5 mg KOH/100mL.

馏分油加氢脱酸技术虽已工业化，但仍存在投资和操作费用高，不能回收高附加值的精细化工原料—环烷酸等问题，推广应用较少。

Factors, such as functional additive for internal combustion engine, blending temperature, distillation range of base oil and the complex ratio of antifoaming agent, affect the foaming performance are highlighted.

报道不同种类抗泡剂在不同润滑油中的泡沫特性，重点介绍了内燃机油功能添加剂、油品调合温度、基础油馏分组成、抗泡剂复合比例等对油品泡沫特性的影响。

The kinetics of tertamyl methyl ether synthesis using C5 fraction of FCC gasoline was studied. The molar ratio of tertiary amylene to methanol was 1.0 and the kinetic experimental data was obtained at the temperature range from 55℃ to 90℃.

研究了FCC汽油中C5馏分合成甲基叔戊基醚的宏观动力学。C5原料与甲醇摩尔比为1/1，在温度分别为55℃~90℃时反应得到了动力学实验数据。

The technology of molecular-distillation for purifying star anise essential oil was researched, and chemical constitutions of essential oil and distilled substance were analyzed by GC-MS.

研究分子蒸馏技术纯化八角精油的工艺条件，利用GC-MS对精油及分离纯化的馏分进行化学组成分析。

With this standard method, simultaneous quantification of DMC, MPC, DPC, phenol and anisole can be achieved accurately, which provide the standard methods for evaluation of different catalysts and control of the reaction process. The microwave-aided catalytic technique was applied in the transesterification of DMC and phenol.

分别以苯甲酸乙酯和丙酮为内标物，实现了对酯交换反应塔釜产品和塔顶馏分的同时定量，为评价催化剂活性的高低和工艺条件的优劣提供了标准化分析方法。

It is separated into a few fractions which boil over different ranges of temperature.

它按沸点的几个温度范围分成少数几种馏分。

But because of its high moisture content, high oxygen content and some impurity, biomass tar needs to be purified or modified before using it as bunker oil.

生物质焦油150℃以下下层馏分的主要含量为羧酸类和酚类物质等多种有机化合物，具有较高的综合利用潜力。

The production of value-added products based on butene oligomerization is one of the effective ways to improve the comprehensive utilization of four carbon fraction.

以丁烯齐聚为基础生产高附加值产品是提高碳四馏分化工综合利用率，为企业挖潜增效的有效途径之一。

In addition nC〓, nC〓, two isomers of C〓 sterene and three isomers of C〓 isoprenoid hydrocarbons were also identified from aliphatic fraction of pyrolyzed product at 200℃. After pyrolyzed at 300℃, the main aliphatic hydrocarbons were normal alkanes ranged from C〓 to C〓, with C〓 as the main peak and C〓 as the second main peak. Meanwhile, pristane, phytane and C〓 sterane were also detected. In the pyrolysates at 400℃ and 500℃, the content of saturated hydrocarbons decreased, the range of normal alkanes distribution became narrow and the main peak was nC〓. Low concentration of C〓-C〓 steranes was detected and the content of C〓-C〓 increased more.

在200℃热模拟产物饱和烃馏分中除检测出两种长链烯烃外，还检测到正十九碳单烯烃、正三十五碳双烯烃、两个碳二十八甾烯的同分异构体和三个C〓类异戊二烯烷烃化合物同分异构体。300℃模拟产物饱和烃主要为正烷烃，正烷烃的碳数分布范围为C〓-C〓，以C〓为主峰、C〓为次主峰；另外，样品中还检出姥鲛烷、植烷和C〓甾烷等化合物。400和500℃热模拟产物中的饱和烃含量下降，正烷烃系列碳数分布范围变窄，主峰碳后移至C〓，检测到低浓度的C〓-C〓甾烷系列化合物，另外，C〓-C〓藿烷系列化合物含量进一步增加。

At present the company mainly engaged in natural fatty alcohol products (C8-10, C12-14, C16-18 and various pure distillate), fatty alcohol polyoxyethylene ether, the basic sub-nonyl polyoxyethylene ether, polyethylene glycol and penetrant series over 100 varieties and zinc powder Insurance Law, Insurance Law sodium powder, hair bleaching agent, carved white block , carved white zinc, zinc oxide, zinc borate, sulfur dioxide and so on.

目前公司主要经营产品有天然脂肪醇（C8-10、C12-14、C16-18及各种纯馏分）、脂肪醇聚氧乙烯醚（AEO、OS及平平加O）、壬基本分聚氧乙烯醚、聚乙二醇和渗透剂系列100多个品种和锌粉法保险粉、甲酸钠法保险粉、漂毛剂、雕白块、雕白锌、氧化锌、硼酸锌、二氧化硫等。

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。