Process for re-refining spent lubeoils

Details Process for re-refining spent lubeoils Process for re-refining spent lubeoils

1987-01-27

1990-07-17

Myers, Helane

Mineral oils: processes and products

Refining

Purifying used oil

208181, 208264, 208355, 208179, 208360, C10M 1100

Patent

active

049419676

ABSTRACT:
Process for re-refining spent lubeoils, wherein a lubeoil freed from water and sludge forming impurities is subjected to a pre-destillation at reduced pressure and with a short residence time of the oil in the distillation column and is subsequently subjected to film evaporation under vacuum, in one or more wiped-film evaporators wherein the overhead product obtained with the film evaporator is subjected to an after-treatment after condensation and the heavy bottom product (residue product) of at least one film evaporator is at least partially recycled to the entrance of said film evaporator.

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