Technology for rerefining used lube oils applied in Europe: A review

Antonina Kupareva, Päivi Mäki-Arvela*, Dmitry Yu Murzin

*Corresponding author for this work

    Research output: Contribution to journalReview Article or Literature ReviewScientificpeer-review

    35 Citations (Scopus)

    Abstract

    The European oil rerefining industry is comprised of 28 plants treating waste oil, which represent one-third in volume of the total European market for lubricants. The biggest European rerefineries with capacity greater than 40 000 tons/year apply various technologies for recycling of used oils from different sources. Used oil recycling technology has undergone significant changes over the past decade. With the newly developed rerefining technologies it is possible to produce higher quality base oil compared with the traditional and old acid clay methods. Currently in Europe the following re-refining methods are widely used: solvent extraction (N-methyl-2-pyrrolidone (Germany), Interline process (United Kingdom, Spain)); combined vacuum distillation and solvent extraction (Vaxon process (Denmark, Spain); hydroprocessing (Hylube process (Germany)); combined thin film evaporation and hydrofinishing (CEP process (Finland)); combined thermal de-asphalting and hydrofinishing (Revivoil process (Italy, Poland, and Spain)). The majority of applied technologies in Europe is appropriate for rerefining of synthetic lubricating oils, which currently are replacing the conventional mineral lube oils due to their enhanced performance characteristics. However, for the rerefining technologies applying alkaline treatment (CEP, Vaxon) and hydrofinishing step (Cyclon, Snamprogetti, Revivoil) the amount of synthetic or semi-synthetic oils based on esters in the feedstock should be eliminated, since these oils are less stable under alkali and hydrofinishing conditions.

    Original languageEnglish
    Pages (from-to)1780-1793
    Number of pages14
    JournalJournal of Chemical Technology and Biotechnology
    Volume88
    Issue number10
    DOIs
    Publication statusPublished - Oct 2013
    MoE publication typeA2 Review article in a scientific journal

    Keywords

    • Base oil
    • Hydrofinishing
    • Solvent extraction
    • Thin film evaporation
    • Used oil rerefining

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