Bleaching Earth is an activated adsorbent clay , typically derived from bentonite or attapulgite, and processed through controlled acid activation . This treatment significantly increases surface area, porosity, and adsorption efficiency , making bleaching earth indispensable in edible oil refining and chemical purification .
It is primarily used to remove color bodies, oxidation products, trace metals, soaps, and residual impurities , helping refiners meet stringent quality, safety, and color specifications.
