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US4154670A Method of rerefining oil by dilution, clarification and extraction 失效
通过稀释,澄清和萃取再炼油的方法

Method of rerefining oil by dilution, clarification and extraction
摘要:
Used oil is rerefined by diluting it with a non-polar diluent, removing insoluble impurities from the resulting solution, extracting said solution with an immiscible liquid extractant to remove further impurities, and finally removing extractant and diluent from the oil.
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