| 摘要 |
FIELD: chemistry.SUBSTANCE: method of purifying non-modified montmorillonite-based bentonite includes primary preparation of raw material, which includes sieving bentonite powder obtained from a open pit, primarily consisting of montmorillonite, from coarse mechanical inclusions, dispersing the bentonite powder in an aqueous medium using a high-speed colloidal mill, further chemical treatment in containers with overhead mixers, treatment in a system of hydrocyclone apparatus and vibratory sieves, treatment in a high-speed drum-type centrifuge, treatment in drying modules and grinding the finished product - non-modified pure montmorillonite-based bentonite or treatment in drying modules and grinding the finished product with preliminary further chemical treatment of pure bentonite in a Z-shaped mixer equipped with an evacuation module. Treatment of the bentonite powder is carried via cation-exchange reactions using phosphates, e.g. sodium phosphate and sodium polyphosphates such as sodium tripolyphosphate, which is a trimer of an orthophosphoric acid salt NaPO.EFFECT: method enables to obtain bentonite of high degree of purity from different types of impurities.3 cl, 3 tbl |
