Scholarlink

<p>This study presents an efficient two-step method that combines vacuum distillation with solvent extraction. Vacuum distillation effectively removes high-molecular-weight contaminants and recovers about 70 vol% of the base oil. The next step involves the solvent extraction using N-methyl-2-pyrrolidone (NMP) and N, N-dimethylacetamide (DMAc), individually and as a mixed solvent. The results show significant improvements in base oil quality. Energy dispersive X-ray fluorescence (ED-XRF) analysis showed a significant decrease in sulfur content, from 0.428 wt% in untreated base oil to 0.1719 wt% with N-methyl-2-pyrrolidone, 0.1771 wt% with dimethylacetamide, and 0.186 wt% with the mixed solvent. The total removal of oxidation products was confirmed by the disappearance of carbonyl bands at 1704&#xa0;cm⁻¹ in FTIR spectra. UV-visible spectroscopy showed a significant removal of aromatic contaminants in the 200–400&#xa0;nm region. Additionally, proton and carbon nuclear magnetic resonance spectroscopy (¹H-NMR and ¹³C-NMR) revealed a dramatic reduction of aromatic signals at 6.5-8 ppm and 110–140 ppm, indicating an effective treatment process. GC-MS analysis confirmed that the regenerated base oil was mainly made up of paraffinic hydrocarbons (C₁₉ - C₂₈). This integrated method offers a promising way for large-scale base oil regeneration. It supports circular economy principles in lubricant manufacturing while reducing environmental impact.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Advanced distillation-extraction method for sustainable regeneration of high-quality base oil using novel eco-friendly polar solvents

  • 期刊论文

  • 发表日期：

    2026年4月7日

查看全文
  • Hozan Jalal Saleem,
  • Abdulsalam Rahim Karim,
  • Yousif Mustafa Salih

摘要

This study presents an efficient two-step method that combines vacuum distillation with solvent extraction. Vacuum distillation effectively removes high-molecular-weight contaminants and recovers about 70 vol% of the base oil. The next step involves the solvent extraction using N-methyl-2-pyrrolidone (NMP) and N, N-dimethylacetamide (DMAc), individually and as a mixed solvent. The results show significant improvements in base oil quality. Energy dispersive X-ray fluorescence (ED-XRF) analysis showed a significant decrease in sulfur content, from 0.428 wt% in untreated base oil to 0.1719 wt% with N-methyl-2-pyrrolidone, 0.1771 wt% with dimethylacetamide, and 0.186 wt% with the mixed solvent. The total removal of oxidation products was confirmed by the disappearance of carbonyl bands at 1704 cm⁻¹ in FTIR spectra. UV-visible spectroscopy showed a significant removal of aromatic contaminants in the 200–400 nm region. Additionally, proton and carbon nuclear magnetic resonance spectroscopy (¹H-NMR and ¹³C-NMR) revealed a dramatic reduction of aromatic signals at 6.5-8 ppm and 110–140 ppm, indicating an effective treatment process. GC-MS analysis confirmed that the regenerated base oil was mainly made up of paraffinic hydrocarbons (C₁₉ - C₂₈). This integrated method offers a promising way for large-scale base oil regeneration. It supports circular economy principles in lubricant manufacturing while reducing environmental impact.

Graphical abstract