ACTIVATED BENTONITE FABRICATION PROCESS Russian patent published in 2007 - IPC C09K8/05 C04B33/04 B28C1/10 

FIELD: mining industry.

SUBSTANCE: invention relates to fabrication of activated bentonites for drilling muds and other applications wherein use of activated bentonite is envisaged. Process according to invention comprises preliminarily crushing bentonite clay followed by jointly grinding clay fraction 0.071-0.08 mm with sodium-containing activator, in particular rhomboidal soda crystal hydrate Na₂CO₃·H₂O or naturally occurring thermonatrite mineral, said activator being measured out for 0.5-1.0 h in quantities of 1.5-2.0% of the weight of clay and said soda crystal hydrate being prepared by dehydration of soda ash first in autoclave at 60-70°C and then in air over a period of at least 48 h.

EFFECT: enhanced bentonite activation efficiency and improved quality and activity of clay powder.

3 cl, 2 tbl, 2 ex