Absorbents and a method for their production

Details Absorbents and a method for their production Absorbents and a method for their production

B - Operations, Transporting

01

J

B01J 20/12 (2006.01) B01D 15/08 (2006.01) B01J 20/20 (2006.01)

Patent

CA 2048546

Abstract Adsorbents and a process for their production Adsorbents suitable for use to remove aromatic or polyaromatic hydrocarbons from liquids such as oils may be produced from an acid-activated siliceous clay containing adsorbed oil by treating to carbonise the oil and to activate the carbon so produced on the surface of the clay. The carbonisation and activation steps may be conducted by heating in the presence of an activating agent which may be zinc chloride. Preferably zinc chloride activated material is subsequently steam-treated. The invention is particularly useful to reduce the content of hazardous polyaromatic hydrocarbons, such as benzo(a)pyrene, from edible oils. 147WF

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