Process for making acid activated bleaching earth using high...

Details Process for making acid activated bleaching earth using high... Process for making acid activated bleaching earth using high...

B - Operations, Transporting

01

J

252/33

B01J 20/12 (2006.01)

Patent

CA 2015257

A process for making acid-activated bleaching earth from a crude attapulgite clay. A crude is selected which is mildly acidic and contains at least about 90% attapulgite. The process involves treating such clay with low levels of activating acid which are mixed with the dried and ground clay, or spray dried from slurries containing the clay-acid mixture. Advantages include: lower acid costs/unit mass of clay treated, lower production costs (no washing, filtering, or waste treatment steps) and environmental soundness (no harmful environmental waste products are produced).

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