Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1992-06-10
1993-11-16
Chaudhuri, Olik
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
423335, 4235663, 4235192, 25218821, 252192, C01B 33193, C01B 3320
Patent
active
052621430
ABSTRACT:
Production of siliceous precipitates, for example sodium aluminosilicates by decomposition of an alkali metal sulfite solution with a solution of a sulfitic species such as sulfur dioxide, sulfurous acid or a salt thereof. Precipitates having excellent properties are obtained and the co-produced aqueous phase is a solution of alkali metal sulfite which has utility in pulp and paper mills. The process is advantageously carried out in proximity to a pulp and paper making operation wherein the siliceous precipitate may be used as a paper making filler and the alkali metal sulfite solution may be used in the pulping process.
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Hagens Graham R.
Le Fevre Gerard
McLellan Fraser
Chaudhuri Olik
Horton Ken
National Silicates Ltd.
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