... , paraffin wax, white oil, lubricating oil, vaseline, etc. Recycling and regeneration of industrial waste oil(mineral oil like machine oil and lubricating oil). In food industry ... oil & asphalt approach), % > =95 > =95 Activity(NaAc approach) > =180 > =200 Free acid(H2SO4), % < =0.15 < =0.20 Water content before leaving factory ...