CORRELATION OF MOLECULAR STRUCTURE AND VISCOSITY INDEX OF BASE OIL

Abstract

Abstract: The structure-activity relationship between molecular structure and viscosity index of lubricating base oil was revealed comprehensively and accurately through the proposed molecular structure parameters measured by high resolution mass spectrometry and nuclear magnetic resonance. It was demonstrated that VI increased with increasing average carbon number of the alkyl chain structure and lowered with increase of polycyclic naphthene carbons and iso/normal ratio. The structure-activity relationship between viscosity index and structural characterization parameters provides solutions for the selection of raw materials, optimization of process conditions and cutting of distillation range for the production of high-viscosity index base oil.

Key words: lube base oil, mass spectrometry, nuclear magnetic resonance, molecular structure characterization, viscosity index

CLC Number:

References

[1] 吴铮, 周干堂.. 我国润滑油基础油市场现状及发展趋势[J]. 石油商技, 2015,, 12(6): 48-55.
[2] 王雷, 兰奕, 宋琳琳, 等. 近年来我国进口基础油市场分析与展望[J]. 润滑油, 2016,, 31(2): 1-3.
[3] 孔劲媛, 王昭, 张蕾.. 我国润滑油暨基础油市场现状与发展预测[J]. 润滑油, 2016,, 31(5): 1-5.
[4] Sarpal A S, Sastry M I S, Bansal V, et al. Correlation of structure and properties of groups Ⅰ to III base oils[J]. Lubrication Science, 2012,, 24(5): 199-215.
[5] Lynch T R.. Process chemistry of lubricant base stocks[M]. Boca Raton: CRC Press, 2007: 58.
[6] Sarpal A S, Kapur G S, Chopra A, et al. Hydrocarbon characterization of hydrocracked base stocks by one- and two-dimensional NMR spectroscopy[J]. Fuel, 1996,, 75(4): 483-490.
[7] Sarpal A S, Kapur G S, Mukherjee S, et al. Characterization by 13C n.m.r. spectroscopy of base oils produced by different processes[J]. Fuel, 1997,, 76(10): 931-937.
[8] Sarpal A S, Sastry M I S, Kumar R, et al. Molecular dynamics of synthetic-based lubricant system by spectroscopic techniques-part 1[J]. Tribology Transactions, 2013,, 56(3): 442-452.
[9] 王京, 贺瑜玲, 黄蔚霞, 等. 润滑油异构降凝基础油结构的核磁共振研究[C]. 中国石油学会第四届石油炼制学术年会论文集(厦门), 北京：石油工业出版社, 2001: 935-938.
[10] 胡松伟, 郭庆洲, 夏国富, 等. 异构脱蜡润滑油基础油组成对其性质的影响[J]. 石油学报（石油加工）, 2015,, 31(4): 831-835.
[11] 张智华, 张祎玮, 高杰,等. 润滑油基础油的核磁共振表征[J]. 石油炼制与化工, 2019,, 50(9): 91-96.
[12] Sharma B K, Stipanovic A J.. Predicting low temperature lubricant rheology by using nuclear magnetic resonance spectroscopy and mass spectrometry[J]. Tribology Letter, 2004,, 16(1-2): 11-19.
[13] 祝馨怡, 刘泽龙, 田松柏, 等. 重馏分油烃类碳数分布的气相色谱_场电离飞行时间质谱测定[J]. 石油学报（石油加工）, 2012,, 28(3): 426-431.
[14] 祝馨怡, 刘泽龙, 徐延勤, 等. 气相色谱-场电离高分辨飞行时间质谱在柴油详细组成分析中的应用[J]. 石油学报(石油加工), 2010,, 26(02): 277-282.
[15] 解增忠, 龙军, 代振宇, 等. 分子动力学模拟在润滑基础油黏度研究中的应用进展[J]. 计算机与应用化学, 2018,, 35(07): 585-595.
[16] 徐春明，杨朝合.. 石油炼制工程[M]. 第四版. 北京：石油工业出版社, 2009: 72.
[17] 王子文, 高杰, 李洪辉, 等. 加氢法生产HVI Ⅱ/Ⅲ类润滑油基础油的技术途径与实践[J]. 润滑油, 2017,, 32(03): 54-57.