AMORPHOUS KAOLIN DERIVATIVE AND METHOD OF PREPARATION THEREOF Russian patent published in 1999 - IPC

Abstract RU 2136593 C1

FIELD: mineral-based cation exchangers. SUBSTANCE: amorphous kaolin derivatives have high values of specific surface and cation exchange and ²⁷Al NMR spectrum obtained during rotation under magic angle having dominant peak of about 55 ppm with respect to Al(H₂O)3+6

. Said derivatives are prepared by reacting kaolin mineral with reagent such as alkali metal or ammonium halogen derivative. This reaction leads to transformation of greater part of octaedrally coordinated aluminium in kaolin mineral into tetrahedrally coordinated aluminium. The resulting derivatives show high selectively with respect to metals:

during cation exchange. EFFECT: improved properties of amorphous kaoline derivative. 17 cl, 8 dwg, 15 ex, 8 tbl

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RU 2 136 593 C1

Authors

Tompson Dzhon Dzherard

Makkinnon Jan Donal'D Richard

Kun Sasha

Gehbbitas Nejl

Dates

1999-09-10—Published

1994-06-16—Filed