Specifications Bleaching Earth for Waste Oil Refining 1)Free acid:<=0.20% 2)Moisture: ... toxic3)Usage:♦Used for decoloring,refining and purifying minerals,such as lubricating oil,diesel oil,paraffin wax,gasoline,grease, ... and regeneration of industrial waste oil,such as machine oil,lubricating oil,used oil,etc.♦Decoloration and refinement of ... (As),%:<0.0005 Bleaching Earth for Waste Oil Refining