Fluorine adsorbent and its method of manufacture

Details Fluorine adsorbent and its method of manufacture Fluorine adsorbent and its method of manufacture

B - Operations, Transporting

01

J

B01J 20/08 (2006.01) B01J 20/12 (2006.01) B01J 20/30 (2006.01) C02F 1/28 (2006.01)

Patent

CA 2070226

Abstract of the Disclosure An adsorbent material for removing fluorine ion from water is formed of an allophane which is processed to yield the material which has a characteristic content by weight of Al -- 15-30%, Si -- 15030%, Fe -- 1-2%, Mg, Ca, alkali (each) 0.01 - 0.1%, the balance being inert elements. The starting allophane can be a Kanuma Tuchi earth, or equivalent. This is crushed and classified to 125-150 mesh, then washed . Iron removal can be carried out magnetically. The material is press dehydrated, and then pulverized or extruded into pellets. These are heat treated by plasma discharge in a closed atmosphere, at a range of 1420-1480° C for 1 - 2 minutes. The adsorbent is relatively rapid in action, and the fluorine can be desorbed by heating.

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