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PROCESS FOR RE-REFINING SPENT LUBE OILS

机译:重提润滑油的过程

摘要

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.
机译:再精制用过的润滑油的方法,其中将不含水和淤渣形成杂质的润滑油在减压下进行预蒸馏,并使油在蒸馏塔中的停留时间短,然后在真空下进行膜蒸发。在一个或多个刮膜蒸发器中,其中用膜蒸发器获得的塔顶产物在冷凝后进行后处理,并且至少一个膜蒸发器的重质底部产物(残渣产物)至少部分再循环到入口所述薄膜蒸发器。

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