Separation method of various components in lubricating oil

By combining thin-layer chromatography and column chromatography, the problem of separating base oil and additives in synthetic hydrocarbon air compressor oil was solved, which laid the foundation for qualitative and quantitative analysis, reduced costs, and improved the stability of separated sample quantities.

CN122171733APending Publication Date: 2026-06-09CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-09
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies cannot effectively separate base oils and additives in synthetic hydrocarbon air compressor oils, making it impossible to conduct qualitative and quantitative analysis to study the relationship between formulation composition and performance.

Method used

A combination of thin-layer chromatography and column chromatography was used. First, the specific shift value (Rf) of each component in the lubricating oil was examined by thin-layer chromatography, and various developing solvents were used to distinguish polarity. Then, column chromatography was used for elution and separation to ensure that each component of the synthetic hydrocarbon base oil and additives was effectively separated.

Benefits of technology

It achieves efficient separation of base oil and additives, provides a basis for qualitative and quantitative analysis, reduces costs, and improves the stability of separated sample quantities.

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Abstract

The present application relates to the field of lubricating oil, discloses a kind of separation methods of various components in lubricating oil, and lubricating oil includes synthetic hydrocarbon base oil and additive, separation method includes: first, using thin layer chromatography to investigate the specific migration value R of each component in lubricating oil f , the specific migration value R of synthetic hydrocarbon base oil in corresponding developing agent f ≥0.7, the specific migration value R of each component in additive in corresponding developing agent f ≤0.5;Then using a variety of developing agents as eluent, the lubricating oil to be separated is eluted and separated using column chromatography, wherein the eluent is used in order from small to large according to the polarity of the corresponding developing agent during elution and separation, and each component is collected in sections, the present application can better realize the separation and enrichment of base oil and additive by using the combination of thin layer chromatography and column chromatography.
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