... )High filtration speed 4)ISO Activated bleaching earth for edible oil refining 1)Raw Material: High quality bentonite and high quality concentrated ... waste oil,such as machine oil, lubricating oil,used engine oil, etc.♦Decoloration and refinement of edible animal and vegetable oil like Cottonseed oil , Soyabean oil, Sunflower oil, Rapeseed oil ...