Process and apparatus for regenerating adsorbents and waste...

B - Operations – Transporting – 01 – J

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B01J 21/20 (2006.01) B01D 53/02 (2006.01) B01J 20/30 (2006.01) B01J 49/00 (2006.01) C01B 31/08 (2006.01)

Patent

CA 1064891

ABSTRACT OF THE DISCLOSURE An adsorbate is removed from an adsorbent by contact- ing the adsorbent with a supercritical fluid which is a solvent for the adsorbate. The supercritical fluid containing the dis- solved adsorbate is then subjected to a physical treatment which renders the supercritical fluid a nonsolvent for the adsorbate and makes it possible to remove the adsorbate from the super- critical fluid. The supercritical fluid is then subjected to another physical treatment to restore it to a state wherein it is a solvent for the adsorbate so that it may be reused. The process and apparatus are particularly suitable for adsorbent regeneration in the treating of waste water.

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