B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/33
B01J 20/12 (2006.01)
Patent
CA 2015256
A process for making acid-activated bleaching earth from certain naturally occurring mixtures of calcium bentonite and attapulgite clay. 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 he 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).
Taylor Dennis R.
Ungermann Charles B.
Engelhard Corporation
Sim & Mcburney
LandOfFree
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