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- In order to examine the accuracy of empirical correlations of petroleum fraction charac-teristic parameters.the errors governing the accuracy of the selected correlations were calcu-lated.er-rors. 通过考核石油馏分特性参数经验关联式的准确性，求出了衡量经验关联式准确性的误差；
- petroleum fraction distilling apparatus 石油分馏仪器
- Boiling Range Distribution of Petroleum Fractions by Gas Chromatography, Test Method for (05. 用气相色谱法测定石油馏分的沸点范围分布的试验方法(05。
- In contact with a hot surface, naphtha petroleum fractions crack to produce ethylene and propylene. 石脑油馏份与一个热表面接角，就裂解而得到乙烯和丙烯。
- A technique for measuring the corrosive sulfur in the petroleum fractions was introduced. 文章介绍了一种测定石油馏分中腐蚀性硫的方法。
- The cracking of light alkanes is much difficult in comparison with that of petroleum fractions. 低碳烷烃裂化比石油馏分困难得多。
- For petroleum fractions, VLE system at low pressure and the modified reduced Antoine equation are recommended for the calculation of phase equilibrium. 推荐使用修正的对比态Antoine方程进行低压体系馏分油的汽液平衡计算。
- Two correlations have been tested respectively by an example,and show fine accuracy as compared with data of enthalpy figures of petroleum fractions. 通过实例应用表明:该式计算速度快与焓值图表吻合较好。
- A characterization approach for petroleum fractions based on the ASTM distillation data and the overall density has been proposed. 本文提出了一种从镏分恩氏蒸馏数据和总体密度对石油馏分进行假组分切割和物性估算的方法。
- The gas chromatography simulated distillation technology is a method that could replace Engler technology in the measurement of distillation range of petroleum fractions. 色谱模拟蒸馏是一种可以取代恩氏蒸馏的馏程测定方法。
- The soil absorbs only a fraction of the rain that beats down. 土壤只吸收猛打到地面上的雨水的一部分。
- I'll be ready in a fraction of a second. 我马上就好。
- Indonesia is abundant in petroleum deposits. 印尼的石油蕴藏量丰富。
- The story does not contain a fraction of truth. 这故事没有一点真实性。
- The activity order of sulfur-containing compounds in petroleum fractions depends on the reaction systems,and the organic solvents also affect the removal of sulfur-containing compounds. 含硫化合物在不同反应体系中的反应活性顺序不同,而且溶剂对含硫化合物的脱除也有很大的影响。
- He has done only a fraction of his homework. 他只做了家庭作业的一小部分。
- The influences of reaction conditions and petroleum fractions on the removal of calcium by dilute aqueous acetic acid were investigated using calcium naphthenate as model compound. 用稀醋酸水溶液作为脱钙剂,环烷酸钙作为模型有机钙化合物,研究了反应条件以及原油三组分的存在对脱钙的影响。
- A nonequilibrium nonlinear dynamic model of petroleum fractionators is developed in this paper by directly taking into account the mass and heat transfer between liquid and vapor in the tower. 建立了基于工艺机理分析的石油分馏塔非平衡动态数学模型,直接考虑汽液两相间的传质传热。
- According to the structural group theory, the chemical composition of petroleum fractions can be classified as structural groups as aromatics, naphthene, olefin and non-hydrocarbon elements etc. 按照结构基团理论，将石油馏分的化学组成划分为芳烃、环烷烃、烯烃和非烃元素等结构基因，其中芳烃和环烷烃还按照其环分布划分为若干个亚族基因。
- The car stopped within a fraction of an inch of the wall. 汽车在离墙不到一英寸的地方停住了。
