1989•ACS symposium seriesRequires access

Nonaqueous Synthesis of Silica Sodalite

D.M. Bibby, Neville I. Baxter, D. Grant-Taylor, L.M. Parker

Abstract

The synthesis of ethylene glycol-silica sodalite from the non-aqueous systems SiO 2 -Na 2 O-ethylene glycol and SiO 2 -Na 2 CO 3 -ethylene glycol is described. Addition of water up to a water/ethylene glycol ratio of 0.05 has no effect, above this sodium metasilicate is produced in increasing amounts until it is the only product at a water/ethylene glycol ratio 0.5. Each sodalite cage contains one ethylene glycol molecule which can be removed by a combination of pyrolysis and high pressure oxidation. These oxidation products can be decapsulated at low pressures to produce a pure silica sodalite.

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Key concepts: Sodalite, Ethylene glycol, Ethylene, Aqueous solution, Chemistry, Inorganic chemistry, Organic chemistry, Catalysis