HIGH-PURITY BIOGENIC SILICON DIOXIDE PRODUCT Russian patent published in 2001 - IPC

FIELD: biologically active materials. SUBSTANCE: high-purity biogenic silicon dioxide product is prepared from diatomite. Invention also relates to high-purity non-calcined , calcined, and alloyed calcined diatomite products characterized by porous and complex silicon dioxide structure only characteristic of diatomite and which show unusually high silicon dioxide content and low density, which cause high specific volume of silicon dioxide. These products are also often characterized by exclusively low content of soluble metals and/or extremely high brightness. EFFECT: extended choice biologically acceptable materials. 20 cl, 1 tbl, 3 ex