Selection of ionic liquids in decolorization of lubricating oil

doi:10.16085/j.issn.1000-6613.2017.06.021

Abstract

Abstract: The decolorization of lubricating oil is a problem demanding prompt solution in the lubricant industry,meanwhile,the application of ionic liquids in petrochemical industry could be a new direction. In this paper,the application of ionic liquids in the decolorization of regenerated lubricating oil has been discussed. The synthesis and characterization of ionic liquids have been studied by taking [C₄mim]BrAlCl₃ as an example. Through the synthesis of the following ionic liquids: [C_xmim]BrAlCl₃,phosphate ester ionic liquids,[C_xmim]BrZnCl₂ and [C_xmim]BF₄(where x = 2,4,6,8)have been used for decolorization of re-refined oil B and J. This experiment examined the effects of different ionic liquids and different process conditions on the oil discoloration process. Based on the analysis of processed oil color level,the best discoloration effect of ionic liquids were [C₈mim]BF₄ and [Bmim] DBP. The optimum reaction temperature,optimum reaction time,and the optimum ILs mass ratio have been determined. Antioxidant properties of discoloration oil have been tested by ICOT. ICOT results show that ILs processing can improve the antioxidant properties of the oil,and the antioxidant properties of oil after ILs processing are better than those of oil after treatment by furfural refining and clay refining.

Key words: environment, regenerated lubricating oil, ionic liquids, decolorization, oxidation

摘要： 润滑油品的脱色是润滑油工业中亟需解决的问题，而离子液体在石油化工中的应用是一个新的发展方向。本文主要探讨离子液体在再生润滑油脱色中的应用，以[C₄mim]BrAlCl₃为例简介离子液体的合成和表征，通过合成咪唑磷酸酯类离子液体、[C_xmim]BrAlCl₃、[C_xmim]BrZnCl₂、[C_xmim]BF₄（其中，x=2，4，6，8）四类离子液体，将其分别用于再生润滑油B油和J油脱色，考察了不同离子液体和不同工艺条件对油品脱色效果的影响，通过对处理后油品色度的分析，筛选出最佳脱色效果离子液体为[C₈mim]BF₄和[Bmim]DBP，并确定其最佳反应温度、最佳反应时间和最佳离子液体加入量等实验条件。采用铁催化氧化法（ICOT）对脱色处理后油品进行了抗氧性能测试，结果表明：离子液体处理提高了油品的抗氧性能，离子液体脱色处理后油品的抗氧性能要优于传统的糠醛精制和白土精制后油品的抗氧性能。

关键词: 环境, 再生润滑油, 离子液体, 脱色, 氧化

CLC Number:

TE626.3

LUO Li, LÜ Ya. Selection of ionic liquids in decolorization of lubricating oil[J]. Chemical Industry and Engineering Progress, 2017, 36(06): 2115-2122.

罗力, 吕涯. 再生润滑油最优脱色效果离子液体的选择[J]. 化工进展, 2017, 36(06): 2115-2122.

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