... . HCY machine is very suitable for the oil refinery company, also for the small oil company who ... decolorization, deacidification, dealkalizing. -- oil vacuum distillation plant , -- oil refinery ,diesel production line, -- waste tyre,rubber ,plastic pyrolysis plant, ... extraction. -- home oil,cooking oil,vegetable oil expeller and refinery ,etc.Waiting for your news. Used engine Oil Depolymerization ...