METHOD FOR REGENERATING USED LUBRICANTS USING SUPERCRITICAL CO2

    公开(公告)号:EP4183463A1

    公开(公告)日:2023-05-24

    申请号:EP21306630.1

    申请日:2021-11-23

    摘要: The present invention relates to a process for regenerating a used lubricant composition, especially used for regenerating an engine drain oil, comprising the steps of:
    - fractionating said used lubricant composition in a countercurrent fractional distillation column with a countercurrent flow of supercritical carbon dioxide (sCO 2 ), wherein said used lubricant composition and supercritical CO 2 are fed in the countercurrent column with a ratio of the S CO 2 flow rate on used lubricant flow rate ranging from 15 to 50; and
    - recovering the regenerated oil extracted within the supercritical CO 2 .
    It further relates to a process for preparing a lubricant composition from a regenerated base oil obtained according to the invention.

    METHOD FOR DEODORIZING REGENERATED LUBRICATING OILS USING SUPERCRITICAL CO2

    公开(公告)号:EP4183462A1

    公开(公告)日:2023-05-24

    申请号:EP21306629.3

    申请日:2021-11-23

    摘要: The present invention relates to a process of deodorization of a at least partly regenerated lubricating oil, said process comprising the steps of:
    - fractionating the at least partly regenerated lubricating oil in a countercurrent fractional distillation column with a countercurrent flow of supercritical carbon dioxide (sCO2), wherein said oil and supercritical CO 2 are fed in the countercurrent column with a ratio of the sCO 2 flow rate on oil flow rate ranging from 15 to 50; and
    - recovering the deodorized lubricating oil which is freed of the bad smelling fraction, said bad smelling fraction being extracted within the supercritical CO 2 .
    It further relates to a process for preparing a lubricant composition from a deodorized base oil obtained according to the invention.