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Removal of alkaline nitride from lubricating oil by modified clays

Published online by Cambridge University Press:  15 February 2022

Mingrong Chen Open the ORCID record for Mingrong Chen [Opens in a new window] ,
Naiwang Liu Open the ORCID record for Naiwang Liu [Opens in a new window] ,
Li Shi  and
Xuan Meng Open the ORCID record for Xuan Meng [Opens in a new window]
Mingrong Chen
Affiliation:
East China University of Science and Technology, Shanghai 200237, China
Naiwang Liu*
Affiliation:
East China University of Science and Technology, Shanghai 200237, China
Li Shi
Affiliation:
East China University of Science and Technology, Shanghai 200237, China
Xuan Meng
Affiliation:
East China University of Science and Technology, Shanghai 200237, China
*
*E-mail: liunw@ecust.edu.cn
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Abstract

In order to improve the removal efficiency of clays in oil refining, to explore the related factors and to clarify the removal mechanism of alkaline nitride, a series of modified clays was prepared to test removal of alkaline nitride from lubricating oil. After the addition of 1 wt.% FeCl3, the removal rate of alkaline nitride increased from 33.6% to 43.3%. Furthermore, the acidity and chlorine content did not exceed acceptable levels. The testing methods of N2 adsorption–desorption, particle-size distribution, Fourier-transform infrared spectroscopy and X-ray diffraction were conducted to verify the removal mechanism. The removal rate of alkaline nitride is mainly related to the density of Lewis acid sites. The Fourier-transform infrared spectra confirmed the existence of the complexation reaction. The basic nitrides were removed by chemical adsorption via Fe3+-complexation.

Keywords

adsorptioncomplexationdenitrogenationFeCl3modified clay
Type
Article
Information
Clay Minerals , Volume 56 , Issue 4 , December 2021 , pp. 261 - 268
Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland

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Footnotes

Associate Editor: Miroslav Pospíšil

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