Alkyl-tetralin base oils synthesized from coal-based chemicals and evaluation of their lubricating properties

doi:10.1016/j.cjche.2022.12.011

中国化学工程学报 ›› 2023, Vol. 58 ›› Issue (6): 20-28.DOI: 10.1016/j.cjche.2022.12.011

• Full Length Article • 上一篇下一篇

Alkyl-tetralin base oils synthesized from coal-based chemicals and evaluation of their lubricating properties

Chen Chen¹, Qiong Tang¹, Hong Xu¹, Mingxing Tang², Xuekuan Li², Lei Liu¹, Jinxiang Dong¹

1. College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China;
2. Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

收稿日期:2022-09-28 修回日期:2022-12-02 出版日期:2023-06-28 发布日期:2023-08-31
通讯作者: Lei Liu,E-mail:liulei@tyut.edu.cn
基金资助:
This work was financially supported by the National Natural Science Foundation of China (U1910202, 21978194, 22078219 and 22072173), and the Fund for Shanxi “1331 Project”, the Key Research and Development Program of Shanxi Province (202102090301005).

Alkyl-tetralin base oils synthesized from coal-based chemicals and evaluation of their lubricating properties

Chen Chen¹, Qiong Tang¹, Hong Xu¹, Mingxing Tang², Xuekuan Li², Lei Liu¹, Jinxiang Dong¹

1. College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China;
2. Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Received:2022-09-28 Revised:2022-12-02 Online:2023-06-28 Published:2023-08-31
Contact: Lei Liu,E-mail:liulei@tyut.edu.cn
Supported by:
This work was financially supported by the National Natural Science Foundation of China (U1910202, 21978194, 22078219 and 22072173), and the Fund for Shanxi “1331 Project”, the Key Research and Development Program of Shanxi Province (202102090301005).

摘要/Abstract

摘要： Naphthenic base oil is an important lubricating base oil and very scarce in the global petroleum resources. Herein, a series of alkylated tetralin fluids similar to naphthenic base oils were produced by the alkylation of tetralin and α-olefins (n-hexene, n-octene, n-decene) with ionic liquid Et₃NHCl/AlCl₃ as the catalyst, where the applied raw materials are totally derived from the coal chemical industry. The product composition could be controlled by adjusting the feeding ratio of tetralin and olefin. The synthetic fluids were evaluated as lubricating base oils to reveal the structure-property correlations. Their principal physicochemical and tribological properties depend on the chain-length of α-olefins and the number of alkyl groups onto the aromatic rings. Bis-(octyl- or decyl-) alkyl tetralin exhibited good properties in terms of viscosity, thermo-oxidation stability and pour point, as well as friction-reducing and anti-wear performance, showing great potential for producing naphthenic base synthetic oils from coal-based chemicals.

关键词: Alkylated tetralin, Product engineering, Ionic liquids, Structure-property correlations, Lubricants, Preparation

Abstract: Naphthenic base oil is an important lubricating base oil and very scarce in the global petroleum resources. Herein, a series of alkylated tetralin fluids similar to naphthenic base oils were produced by the alkylation of tetralin and α-olefins (n-hexene, n-octene, n-decene) with ionic liquid Et₃NHCl/AlCl₃ as the catalyst, where the applied raw materials are totally derived from the coal chemical industry. The product composition could be controlled by adjusting the feeding ratio of tetralin and olefin. The synthetic fluids were evaluated as lubricating base oils to reveal the structure-property correlations. Their principal physicochemical and tribological properties depend on the chain-length of α-olefins and the number of alkyl groups onto the aromatic rings. Bis-(octyl- or decyl-) alkyl tetralin exhibited good properties in terms of viscosity, thermo-oxidation stability and pour point, as well as friction-reducing and anti-wear performance, showing great potential for producing naphthenic base synthetic oils from coal-based chemicals.

Key words: Alkylated tetralin, Product engineering, Ionic liquids, Structure-property correlations, Lubricants, Preparation

Chen Chen, Qiong Tang, Hong Xu, Mingxing Tang, Xuekuan Li, Lei Liu, Jinxiang Dong. Alkyl-tetralin base oils synthesized from coal-based chemicals and evaluation of their lubricating properties[J]. 中国化学工程学报, 2023, 58(6): 20-28.

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Alkyl-tetralin base oils synthesized from coal-based chemicals and evaluation of their lubricating properties

Alkyl-tetralin base oils synthesized from coal-based chemicals and evaluation of their lubricating properties

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