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- narrow cut petroleum fractions 石油窄馏分
- 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。
- Oil prices were higher Friday in a fluctuating market, as speculative buying helped offset worries that a slowing U.S. Economy would cut petroleum consumption. 油价高周五,在市场起伏,由于投机性买盘帮助抵消担心美国经济放缓将减少石油消耗。
- 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。
- High-pressure water jet cutting has advantages of narrow cuts,no thermal stress,dustless and cutting any materials. 高压水射流切割具有切缝窄、不产生热应力、无粉尘、几乎可切割任何材料等优点。
- A gem cut in the form of a narrow rectangle. 狭长形宝石被切成细条形的宝石
- TECHNICAL TRANSFORM OF A HEXANE NARROW CUT UNIT 窄馏分己烷生产装置技术改造
- 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。
- 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。
- 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。
- Using ASTM method as basic model, a method is proposed for measuring distillation range of petroleum fractions by Engler distillation related with gas chromatography simulated distillation technology. 摘要以美国材料与试验协会(ASTM)方法为基础模型，提出一种基于色谱模拟蒸馏技术的恩氏蒸馏馏程测定方法。
- Rose bushes shoot again after being cut back. 玫瑰丛修剪後还能再长出新枝。
- In order not to be late, she cut across the fields. 为了不迟到，她抄近路穿过田野。
- 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；
